diff --git a/README.md b/README.md
index 3349b059a..ec6d85222 100644
--- a/README.md
+++ b/README.md
@@ -61,7 +61,7 @@ Note: Version 2.0 is not backward compatible with v1.0. The File system structur
 common commands available in all contexts:
   exit
   help
-  log [level] [pretty | raw] [trace ID]
+  log [level]
   su
 
 (top root level)
@@ -86,6 +86,7 @@ ems
 	show devices
 	show emsbus
 	show values
+	watch <on | off | raw> [ID]
 
 mqtt
 	publish
diff --git a/lib/uuid-log/src/format_level_char.cpp b/lib/uuid-log/src/format_level_char.cpp
index 39f7848ea..264e88083 100644
--- a/lib/uuid-log/src/format_level_char.cpp
+++ b/lib/uuid-log/src/format_level_char.cpp
@@ -23,7 +23,7 @@ namespace uuid {
 namespace log {
 
 char format_level_char(Level level) {
-    constexpr char log_level_chars[(int)Level::ALL - (int)Level::OFF + 1] = {' ', 'P', 'A', 'C', 'E', 'W', 'N', 'I', 'T', 'D', ' '}; // changed by proddy
+    constexpr char log_level_chars[(int)Level::ALL - (int)Level::OFF + 1] = {' ', 'P', 'A', 'C', 'E', 'W', 'N', 'I', 'D', 'T', ' '};
     return log_level_chars[(int)level + 1];
 }
 
diff --git a/lib/uuid-log/src/format_level_lowercase.cpp b/lib/uuid-log/src/format_level_lowercase.cpp
index 4cd603590..61dc124fb 100644
--- a/lib/uuid-log/src/format_level_lowercase.cpp
+++ b/lib/uuid-log/src/format_level_lowercase.cpp
@@ -47,8 +47,8 @@ PROGMEM = {reinterpret_cast<const __FlashStringHelper *>(pstr_level_lowercase_of
            reinterpret_cast<const __FlashStringHelper *>(pstr_level_lowercase_warning),
            reinterpret_cast<const __FlashStringHelper *>(pstr_level_lowercase_notice),
            reinterpret_cast<const __FlashStringHelper *>(pstr_level_lowercase_info),
-           reinterpret_cast<const __FlashStringHelper *>(pstr_level_lowercase_trace), // switched by proddy
            reinterpret_cast<const __FlashStringHelper *>(pstr_level_lowercase_debug),
+           reinterpret_cast<const __FlashStringHelper *>(pstr_level_lowercase_trace),
            reinterpret_cast<const __FlashStringHelper *>(pstr_level_lowercase_all)};
 
 const __FlashStringHelper * format_level_lowercase(Level level) {
diff --git a/lib/uuid-log/src/format_level_uppercase.cpp b/lib/uuid-log/src/format_level_uppercase.cpp
index 9379b378a..480e2e7a8 100644
--- a/lib/uuid-log/src/format_level_uppercase.cpp
+++ b/lib/uuid-log/src/format_level_uppercase.cpp
@@ -47,8 +47,8 @@ PROGMEM = {reinterpret_cast<const __FlashStringHelper *>(pstr_level_uppercase_of
            reinterpret_cast<const __FlashStringHelper *>(pstr_level_uppercase_warning),
            reinterpret_cast<const __FlashStringHelper *>(pstr_level_uppercase_notice),
            reinterpret_cast<const __FlashStringHelper *>(pstr_level_uppercase_info),
-           reinterpret_cast<const __FlashStringHelper *>(pstr_level_uppercase_trace), // switched by proddy
            reinterpret_cast<const __FlashStringHelper *>(pstr_level_uppercase_debug),
+           reinterpret_cast<const __FlashStringHelper *>(pstr_level_uppercase_trace),
            reinterpret_cast<const __FlashStringHelper *>(pstr_level_uppercase_all)};
 
 const __FlashStringHelper * format_level_uppercase(Level level) {
diff --git a/lib/uuid-log/src/levels.cpp b/lib/uuid-log/src/levels.cpp
index e5bd51281..232067785 100644
--- a/lib/uuid-log/src/levels.cpp
+++ b/lib/uuid-log/src/levels.cpp
@@ -33,8 +33,8 @@ std::vector<Level> levels() {
             Level::WARNING,
             Level::NOTICE,
             Level::INFO,
+            Level::DEBUG,
             Level::TRACE,
-            Level::DEBUG, // switched by proddy
             Level::ALL};
 }
 
diff --git a/lib/uuid-log/src/levels_lowercase.cpp b/lib/uuid-log/src/levels_lowercase.cpp
index c54512db7..30b3a4c29 100644
--- a/lib/uuid-log/src/levels_lowercase.cpp
+++ b/lib/uuid-log/src/levels_lowercase.cpp
@@ -35,8 +35,8 @@ std::vector<std::string> levels_lowercase() {
             uuid::read_flash_string(format_level_lowercase(Level::WARNING)),
             uuid::read_flash_string(format_level_lowercase(Level::NOTICE)),
             uuid::read_flash_string(format_level_lowercase(Level::INFO)),
-            uuid::read_flash_string(format_level_lowercase(Level::TRACE)), // switched by proddy
             uuid::read_flash_string(format_level_lowercase(Level::DEBUG)),
+            uuid::read_flash_string(format_level_lowercase(Level::TRACE)),
             uuid::read_flash_string(format_level_lowercase(Level::ALL))};
 }
 
diff --git a/lib/uuid-log/src/levels_uppercase.cpp b/lib/uuid-log/src/levels_uppercase.cpp
index 9f86f1476..b7d546603 100644
--- a/lib/uuid-log/src/levels_uppercase.cpp
+++ b/lib/uuid-log/src/levels_uppercase.cpp
@@ -35,8 +35,8 @@ std::vector<std::string> levels_uppercase() {
             uuid::read_flash_string(format_level_uppercase(Level::WARNING)),
             uuid::read_flash_string(format_level_uppercase(Level::NOTICE)),
             uuid::read_flash_string(format_level_uppercase(Level::INFO)),
-            uuid::read_flash_string(format_level_uppercase(Level::TRACE)), // switched by proddy
             uuid::read_flash_string(format_level_uppercase(Level::DEBUG)),
+            uuid::read_flash_string(format_level_uppercase(Level::TRACE)),
             uuid::read_flash_string(format_level_uppercase(Level::ALL))};
 }
 
diff --git a/lib/uuid-log/src/uuid/log.h b/lib/uuid-log/src/uuid/log.h
index 48ee3f727..8fa64f31d 100644
--- a/lib/uuid-log/src/uuid/log.h
+++ b/lib/uuid-log/src/uuid/log.h
@@ -71,7 +71,7 @@ namespace uuid {
 namespace log {
 
 /**
- * Severity level of log messages. Proddy switches trace & debug
+ * Severity level of log messages.
  *
  * @since 1.0.0
  */
@@ -84,8 +84,8 @@ enum Level : int8_t {
     WARNING,    /*!< Warning conditions. @since 1.0.0 */
     NOTICE,     /*!< Normal but significant conditions. @since 1.0.0 */
     INFO,       /*!< Informational messages. @since 1.0.0 */
-    TRACE,      /*!< Trace messages. @since 1.0.0 */
     DEBUG,      /*!< Debug-level messages. @since 1.0.0 */
+    TRACE,      /*!< Trace messages. @since 1.0.0 */
     ALL,        /*!< Meta level representing all log messages. @since 1.0.0 */
 };
 
diff --git a/src/console.cpp b/src/console.cpp
index 7dce00224..419eb8082 100644
--- a/src/console.cpp
+++ b/src/console.cpp
@@ -225,9 +225,8 @@ void Console::load_standard_commands(unsigned int context) {
         context,
         CommandFlags::USER,
         flash_string_vector{F_(log)},
-        flash_string_vector{F_(log_level_optional), F_(trace_format_optional), F_(traceid_optional)},
+        flash_string_vector{F_(log_level_optional)},
         [](Shell & shell, const std::vector<std::string> & arguments) {
-            uint16_t watch_id;
             if (!arguments.empty()) {
                 uuid::log::Level level;
 
@@ -237,41 +236,10 @@ void Console::load_standard_commands(unsigned int context) {
                     shell.printfln(F_(invalid_log_level));
                     return;
                 }
-
-                // trace logic
-                if (level == uuid::log::Level::TRACE || level == uuid::log::Level::DEBUG) {
-                    watch_id = LOG_TRACE_WATCH_NONE; // no watch ID set
-                    if (arguments.size() > 1) {
-                        // next argument is raw or full
-                        if (arguments[1] == read_flash_string(F_(raw))) {
-                            emsesp::EMSESP::trace_raw(true);
-                        } else if (arguments[1] == read_flash_string(F_(pretty))) {
-                            emsesp::EMSESP::trace_raw(false);
-                        } else {
-                            emsesp::EMSESP::trace_watch_id(Helpers::hextoint(arguments[1].c_str()));
-                        }
-
-                        // get the watch_id if its set
-                        if (arguments.size() == 3) {
-                            emsesp::EMSESP::trace_watch_id(Helpers::hextoint(arguments[2].c_str()));
-                        }
-                    } else {
-                        // it was "log trace" so reset the watch id and switch back to pretty
-                        emsesp::EMSESP::trace_raw(false);
-                        emsesp::EMSESP::trace_watch_id(LOG_TRACE_WATCH_NONE);
-                    }
-                }
             }
 
             // print out logging settings
             shell.printfln(F_(log_level_fmt), uuid::log::format_level_uppercase(shell.log_level()));
-            watch_id = emsesp::EMSESP::trace_watch_id();
-            if (watch_id == LOG_TRACE_WATCH_NONE) {
-                shell.printfln(F("Tracing all telegrams"));
-            } else {
-                shell.printfln(F("Tracing only telegrams that match a device ID or telegram type of 0x%02X"), watch_id);
-            }
-            shell.printfln(F_(trace_raw_fmt), emsesp::EMSESP::trace_raw() ? F("as raw bytes") : F("in decoded format"));
         },
         [](Shell & shell __attribute__((unused)), const std::vector<std::string> & arguments __attribute__((unused))) -> std::vector<std::string> {
             return uuid::log::levels_lowercase();
diff --git a/src/console.h b/src/console.h
index 640326926..69ad657f4 100644
--- a/src/console.h
+++ b/src/console.h
@@ -42,8 +42,8 @@ using uuid::log::Level;
 // clang-format off
 
 #define LOG_DEBUG(...) if (logger_.enabled(Level::DEBUG)) {logger_.debug(__VA_ARGS__);}
-#define LOG_TRACE(...) if (logger_.enabled(Level::TRACE)) {logger_.trace(__VA_ARGS__);}
 #define LOG_INFO(...) logger_.info(__VA_ARGS__)
+#define LOG_TRACE(...) logger_.trace(__VA_ARGS__)
 #define LOG_NOTICE(...) logger_.notice(__VA_ARGS__)
 #define LOG_WARNING(...) logger_.warning(__VA_ARGS__)
 #define LOG_ERROR(...) logger_.err(__VA_ARGS__)
@@ -90,7 +90,7 @@ MAKE_PSTR_WORD(restart)
 MAKE_PSTR_WORD(reconnect)
 MAKE_PSTR_WORD(format)
 MAKE_PSTR_WORD(raw)
-MAKE_PSTR_WORD(pretty)
+MAKE_PSTR_WORD(watch)
 
 // context menus
 MAKE_PSTR_WORD(mqtt)
@@ -102,9 +102,6 @@ MAKE_PSTR(degrees_mandatory, "<degrees>")
 MAKE_PSTR(asterisks, "********")
 MAKE_PSTR(n_mandatory, "<n>")
 MAKE_PSTR(n_optional, "[n]")
-MAKE_PSTR(traceid_optional, "[trace ID]")
-MAKE_PSTR(trace_raw_fmt, "Displaying telegrams %s")
-MAKE_PSTR(trace_format_optional, "[pretty | raw]")
 MAKE_PSTR(bool_mandatory, "<on | off>")
 MAKE_PSTR(typeid_mandatory, "<type ID>")
 MAKE_PSTR(deviceid_mandatory, "<device ID>")
diff --git a/src/device_library.h b/src/device_library.h
index 828a02ad2..3cbe47026 100644
--- a/src/device_library.h
+++ b/src/device_library.h
@@ -98,6 +98,7 @@
 {207, DeviceType::CONTROLLER, F("Sense II/CS200"), DeviceFlags::EMS_DEVICE_FLAG_NONE}, // 0x10
 {209, DeviceType::CONTROLLER, F("ErP"), DeviceFlags::EMS_DEVICE_FLAG_NONE}, // 0x09
 {218, DeviceType::CONTROLLER, F("M200/RFM200"), DeviceFlags::EMS_DEVICE_FLAG_NONE}, // 0x50
+{224, DeviceType::CONTROLLER, F("Bosch 9000i"), DeviceFlags::EMS_DEVICE_FLAG_NONE}, // 0x09
 {230, DeviceType::CONTROLLER, F("BC Base"), DeviceFlags::EMS_DEVICE_FLAG_NONE}, // 0x09
 {241, DeviceType::CONTROLLER, F("Condens 5000i"), DeviceFlags::EMS_DEVICE_FLAG_NONE}, // 0x09
 
diff --git a/src/devices/boiler.cpp b/src/devices/boiler.cpp
index 031b74333..19565c058 100644
--- a/src/devices/boiler.cpp
+++ b/src/devices/boiler.cpp
@@ -51,7 +51,6 @@ Boiler::Boiler(uint8_t device_type, int8_t device_id, uint8_t product_id, const
     // the telegram handlers...
     register_telegram_type(0x10, F("UBAErrorMessage1"), false, std::bind(&Boiler::process_UBAErrorMessage, this, _1));
     register_telegram_type(0x11, F("UBAErrorMessage2"), false, std::bind(&Boiler::process_UBAErrorMessage, this, _1));
-    register_telegram_type(0x12, F("UBAErrorMessage3"), false, std::bind(&Boiler::process_UBAErrorMessage, this, _1));
     register_telegram_type(0x18, F("UBAMonitorFast"), false, std::bind(&Boiler::process_UBAMonitorFast, this, _1));
     register_telegram_type(0x19, F("UBAMonitorSlow"), true, std::bind(&Boiler::process_UBAMonitorSlow, this, _1));
     register_telegram_type(0x34, F("UBAMonitorWW"), false, std::bind(&Boiler::process_UBAMonitorWW, this, _1));
diff --git a/src/emsesp.cpp b/src/emsesp.cpp
index 571c2388e..4152eaf71 100644
--- a/src/emsesp.cpp
+++ b/src/emsesp.cpp
@@ -32,6 +32,10 @@ MAKE_PSTR(tx_mode_fmt, "Tx mode = %d")
 MAKE_PSTR(bus_id_fmt, "Bus ID = %02X")
 MAKE_PSTR(read_only_fmt, "Read-only mode is %s")
 
+MAKE_PSTR(watchid_optional, "[ID]")
+MAKE_PSTR(watch_format_mandatory, "<off | on | raw>")
+MAKE_PSTR(invalid_watch, "Invalid watch type")
+
 MAKE_PSTR(logger_name, "emsesp")
 
 namespace emsesp {
@@ -56,8 +60,8 @@ Shower    EMSESP::shower_;    // Shower logic
 
 // static/common variables
 uint8_t  EMSESP::actual_master_thermostat_ = EMSESP_DEFAULT_MASTER_THERMOSTAT; // which thermostat leads when multiple found
-uint16_t EMSESP::trace_watch_id_           = LOG_TRACE_WATCH_NONE;             // for when log is TRACE. 0 means no trace set
-bool     EMSESP::trace_raw_                = false;                            // not showing raw when in trace logging
+uint16_t EMSESP::watch_id_                 = WATCH_NONE;                       // for when log is TRACE. 0 means no trace set
+uint8_t  EMSESP::watch_                    = 0;                                // trace off
 bool     EMSESP::tap_water_active_         = false;                            // for when Boiler states we having running warm water. used in Shower()
 bool     EMSESP::ems_read_only_;
 uint32_t EMSESP::last_fetch_ = 0;
@@ -97,12 +101,12 @@ uint8_t EMSESP::actual_master_thermostat() {
 }
 
 // to watch both type IDs and device IDs
-void EMSESP::trace_watch_id(uint16_t trace_watch_id) {
+void EMSESP::watch_id(uint16_t watch_id) {
     // if it's a device ID, which is a single byte, remove the MSB so to support both Buderus and HT3 protocols
-    if (trace_watch_id <= 0xFF) {
-        trace_watch_id_ = (trace_watch_id & 0x7F);
+    if (watch_id <= 0xFF) {
+        watch_id_ = (watch_id & 0x7F);
     } else {
-        trace_watch_id_ = trace_watch_id;
+        watch_id_ = watch_id;
     }
 }
 
@@ -389,10 +393,9 @@ void EMSESP::process_version(std::shared_ptr<const Telegram> telegram) {
 // We also check for common telgram types, like the Version(0x02)
 // returns false if there are none found
 bool EMSESP::process_telegram(std::shared_ptr<const Telegram> telegram) {
-    if ((logger_.enabled(Level::TRACE)) && !trace_raw()) {
-        if ((trace_watch_id_ == LOG_TRACE_WATCH_NONE) || (telegram->src == trace_watch_id_) || (telegram->dest == trace_watch_id_)
-            || (telegram->type_id == trace_watch_id_)) {
-            LOG_TRACE(pretty_telegram(telegram).c_str());
+    if (watch() == 1) {
+        if ((watch_id_ == WATCH_NONE) || (telegram->src == watch_id_) || (telegram->dest == watch_id_) || (telegram->type_id == watch_id_)) {
+            LOG_INFO(pretty_telegram(telegram).c_str());
         }
     }
 
@@ -568,9 +571,9 @@ void EMSESP::incoming_telegram(uint8_t * data, const uint8_t length) {
     if (((first_value & 0x7F) == txservice_.ems_bus_id()) && (length > 1)) {
         // if we ask ourself at roomcontrol for version e.g. 0B 98 02 00 20
         Roomctrl::check((data[1] ^ 0x80 ^ rxservice_.ems_mask()), data);
-//#ifdef EMSESP_DEBUG
-        LOG_DEBUG(F("Echo: %s"), Helpers::data_to_hex(data, length).c_str());
-//#endif
+#ifdef EMSESP_DEBUG
+        LOG_DEBUG(F("[DEBUG] Echo: %s"), Helpers::data_to_hex(data, length).c_str());
+#endif
         return; // it's an echo
     }
 
@@ -613,7 +616,7 @@ void EMSESP::incoming_telegram(uint8_t * data, const uint8_t length) {
             // So re-send the last Tx and increment retry count
             uint8_t retries = txservice_.retry_tx(); // returns 0 if exceeded count
 #ifdef EMSESP_DEBUG
-            LOG_DEBUG(F("Last Tx operation failed. Retry #%d. Sent: %s, received: %s"),
+            LOG_DEBUG(F("[DEBUG] Last Tx operation failed. Retry #%d. Sent: %s, received: %s"),
                       retries,
                       txservice_.last_tx_to_string().c_str(),
                       Helpers::data_to_hex(data, length).c_str());
@@ -725,7 +728,6 @@ void EMSESP::console_commands(Shell & shell, unsigned int context) {
         flash_string_vector{F_(set), F_(tx_mode)},
         flash_string_vector{F_(n_mandatory)},
         [](Shell & shell, const std::vector<std::string> & arguments) {
-            // uint8_t tx_mode = (arguments[0]).at(0) - '0';
             uint8_t tx_mode = std::strtol(arguments[0].c_str(), nullptr, 10);
             if ((tx_mode > 0) && (tx_mode <= 30)) {
                 Settings settings;
@@ -824,6 +826,50 @@ void EMSESP::console_commands(Shell & shell, unsigned int context) {
                                            shell.printfln(F_(read_only_fmt), settings.ems_read_only() ? F_(on) : F_(off));
                                        });
 
+
+
+    EMSESPShell::commands->add_command(ShellContext::EMS,
+                                       CommandFlags::USER,
+                                       flash_string_vector{F_(watch)},
+                                       flash_string_vector{F_(watch_format_mandatory), F_(watchid_optional)},
+                                       [](Shell & shell, const std::vector<std::string> & arguments) {
+                                           // get raw/pretty
+                                           if (arguments[0] == read_flash_string(F_(raw))) {
+                                               emsesp::EMSESP::watch(2); // raw
+                                           } else if (arguments[0] == read_flash_string(F_(on))) {
+                                               emsesp::EMSESP::watch(1); // on
+                                           } else if (arguments[0] == read_flash_string(F_(off))) {
+                                               emsesp::EMSESP::watch(0); // off
+                                           } else {
+                                               shell.printfln(F_(invalid_watch));
+                                               return;
+                                           }
+
+                                           uint16_t watch_id;
+                                           if (arguments.size() == 2) {
+                                               // get the watch_id if its set
+                                               watch_id = Helpers::hextoint(arguments[1].c_str());
+                                           } else {
+                                               watch_id = WATCH_NONE;
+                                           }
+
+                                           emsesp::EMSESP::watch_id(watch_id);
+
+                                           uint8_t watch = emsesp::EMSESP::watch();
+                                           if (watch == 0) {
+                                               shell.printfln(F("Watch is off"));
+                                           } else if (watch == 1) {
+                                               shell.printfln(F("Watching incoming telegrams, displayed in decoded format"));
+                                           } else {
+                                               shell.printfln(F("Watching incoming telegrams, displayed as raw bytes"));
+                                           }
+
+                                           watch_id = emsesp::EMSESP::watch_id();
+                                           if (watch_id != WATCH_NONE) {
+                                               shell.printfln(F("Filtering only telegrams that match a device ID or telegram type of 0x%02X"), watch_id);
+                                           }
+                                       });
+
     // enter the context
     Console::enter_custom_context(shell, context);
 }
@@ -839,7 +885,6 @@ void EMSESP::start() {
     network_.start();
     console_.start();
     sensors_.start();
-    rxservice_.start();
     txservice_.start();
     shower_.start();
     mqtt_.start();
diff --git a/src/emsesp.h b/src/emsesp.h
index 5ebceed26..a2c862df1 100644
--- a/src/emsesp.h
+++ b/src/emsesp.h
@@ -46,7 +46,7 @@
 
 #include "devices/boiler.h"
 
-#define LOG_TRACE_WATCH_NONE 0 // no watch id set
+#define WATCH_NONE 0 // no watch id set
 
 namespace emsesp {
 
@@ -99,18 +99,18 @@ class EMSESP {
         return sensors_.devices();
     }
 
-    static void trace_watch_id(uint16_t id);
+    static void watch_id(uint16_t id);
 
-    static uint16_t trace_watch_id() {
-        return trace_watch_id_;
+    static uint16_t watch_id() {
+        return watch_id_;
     }
 
-    static void trace_raw(bool trace_raw) {
-        trace_raw_ = trace_raw;
+    static void watch(uint8_t watch) {
+        watch_ = watch; // 0=off, 1=on, 2=raw
     }
 
-    static bool trace_raw() {
-        return trace_raw_;
+    static uint8_t watch() {
+        return watch_; // 0=off, 1=on, 2=raw
     }
 
     static bool tap_water_active() {
@@ -131,7 +131,7 @@ class EMSESP {
 
     static void fetch_device_values(const uint8_t device_id = 0);
 
-    static bool        add_device(const uint8_t device_id, const uint8_t product_id, std::string & version, const uint8_t brand);
+    static bool add_device(const uint8_t device_id, const uint8_t product_id, std::string & version, const uint8_t brand);
 
     static Mqtt      mqtt_;
     static System    system_;
@@ -166,8 +166,8 @@ class EMSESP {
     static std::vector<Device_record>              device_library_;
 
     static uint8_t  actual_master_thermostat_;
-    static uint16_t trace_watch_id_;
-    static bool     trace_raw_;
+    static uint16_t watch_id_;
+    static uint8_t  watch_;
     static bool     tap_water_active_;
     static bool     ems_read_only_;
 };
diff --git a/src/helpers.cpp b/src/helpers.cpp
index ae83cd0b6..6ac1d7341 100644
--- a/src/helpers.cpp
+++ b/src/helpers.cpp
@@ -104,7 +104,7 @@ char * Helpers::render_value(char * result, uint8_t value, uint8_t format) {
         return (result);
     }
 
-    static char s2[5] = {0};
+    char s2[5] = {0};
 
     switch (format) {
     case 2:
@@ -226,7 +226,7 @@ char * Helpers::render_value(char * result, const uint32_t value, const uint8_t
         return (result);
     }
 
-    static char s[20] = {0};
+    char s[20] = {0};
 
 #ifndef EMSESP_STANDALONE
     if (format <= 1) {
diff --git a/src/mqtt.cpp b/src/mqtt.cpp
index 5954bb79b..b02898efd 100644
--- a/src/mqtt.cpp
+++ b/src/mqtt.cpp
@@ -340,7 +340,7 @@ void Mqtt::on_message(char * topic, char * payload, size_t len) {
     strlcpy(message, payload, len + 1);
 
 #ifdef EMSESP_DEBUG
-    LOG_DEBUG(F("Received %s => %s (length %d)"), topic, message, len);
+    LOG_DEBUG(F("[DEBUG] Received %s => %s (length %d)"), topic, message, len);
 #endif
 
     // strip out everything until the last /
diff --git a/src/system.h b/src/system.h
index 06fd5c32f..d8f16c930 100644
--- a/src/system.h
+++ b/src/system.h
@@ -29,12 +29,7 @@
 #include "telegram.h"
 
 #if defined(ESP8266)
-#include "uart/emsuart_esp8266.h"
 #include <RTCVars.h>
-#elif defined(ESP32)
-#include "uart/emsuart_esp32.h"
-#elif defined(EMSESP_STANDALONE)
-#include <emsuart_standalone.h>
 #endif
 
 #ifndef EMSESP_STANDALONE
diff --git a/src/telegram.cpp b/src/telegram.cpp
index 6ae4907a0..a393093bc 100644
--- a/src/telegram.cpp
+++ b/src/telegram.cpp
@@ -68,8 +68,8 @@ Telegram::Telegram(uint8_t operation, uint8_t src, uint8_t dest, uint16_t type_i
     , type_id(type_id)
     , offset(offset)
     , message_length(message_length) {
-    // copy complete telegram data over
-    for (uint8_t i = 0; i < message_length; i++) {
+    // copy complete telegram data over, preventing buffer overflow
+    for (uint8_t i = 0; ((i < message_length) && (i != EMS_MAX_TELEGRAM_MESSAGE_LENGTH - 1)); i++) {
         message_data[i] = data[i];
     }
 }
@@ -211,36 +211,26 @@ void RxService::flush_rx_queue() {
     rx_telegram_id_ = 0;
 }
 
-// start and initialize the Rx incoming buffer
-void RxService::start() {
-    // LOG_DEBUG(F("RxStart"));
-    // function not currently used
-}
-
 // Rx loop, run as many times as you can
 // processes all telegrams on the queue. Assumes there are valid (i.e. CRC checked)
 void RxService::loop() {
+    /*
 #ifndef EMSESP_STANDALONE
-    // give rx some breathing space
-    //if ((uuid::get_uptime() - last_rx_check_) < RX_LOOP_WAIT) {
-    //    return;
-    //}
-    //last_rx_check_ = uuid::get_uptime();
+    give rx some breathing space if ((uuid::get_uptime() - last_rx_check_) < RX_LOOP_WAIT) {
+        return;
+    }
+    last_rx_check_ = uuid::get_uptime();
 #endif
+*/
 
     while (!rx_telegrams_.empty()) {
         auto telegram = rx_telegrams_.front().telegram_;
 
-        // rx_telegrams_overflow_ = false;
-
         (void)EMSESP::process_telegram(telegram); // further process the telegram
 
         increment_telegram_count(); // increase count
 
-        // remove it from the queue
-        // if (!rx_telegrams_overflow_) {
-        rx_telegrams_.pop_front();
-        // }
+        rx_telegrams_.pop_front(); // remove it from the queue
     }
 }
 
@@ -249,10 +239,15 @@ void RxService::loop() {
 // length includes the CRC
 // for EMS+ the type_id has the value + 256. We look for these type of telegrams with F7, F9 and FF in 3rd byte
 void RxService::add(uint8_t * data, uint8_t length) {
+    if (length < 2) {
+        return;
+    }
+
     // validate the CRC
     uint8_t crc = calculate_crc(data, length - 1);
-    if (data[length - 1] != crc) {
-        LOG_TRACE(F("Rx: %s %s(BAD, CRC %02X != %02X)%s"), Helpers::data_to_hex(data, length).c_str(), COLOR_RED, data[length - 1], crc, COLOR_RESET);
+
+    if ((data[length - 1] != crc) && (EMSESP::watch() != 0)) {
+        LOG_ERROR(F("Rx: %s %s(BAD, CRC %02X != %02X)%s"), Helpers::data_to_hex(data, length).c_str(), COLOR_RED, data[length - 1], crc, COLOR_RESET);
         increment_telegram_error_count();
         return;
     }
@@ -270,43 +265,36 @@ void RxService::add(uint8_t * data, uint8_t length) {
     uint8_t dest   = data[1] & 0x7F; // strip MSB, don't care if its read or write for processing
     uint8_t offset = data[3];        // offset is always 4th byte
 
-    uint16_t  type_id = 0; // this could be 2 bytes for ems+
-    uint8_t * message_data;
-    uint8_t   message_length;
+    // set default values, which will be adjusted depending on the EMS1.0/2.0 logic below
+    uint16_t  type_id        = 0;
+    uint8_t * message_data   = data;
+    uint8_t   message_length = length;
 
     // work out depending on the type where the data message block starts
     if (data[2] < 0xF0 || length < 6) {
         // EMS 1.0
-        type_id        = data[2];
-        message_data   = data + 4;   // message block starts at 5th byte
-        message_length = length - 5; // remove 4 bytes header plus CRC
+        type_id = data[2];
+        message_data += 4;   // message block starts at 5th byte
+        message_length -= 5; // remove 4 bytes header plus CRC
     } else {
         // EMS 2.0 / EMS+
         if (data[2] == 0xFF) {
             // check for empty data
             // special broadcast telegrams on ems+ have no data values, some even don't have a type ID, e.g. "21 0B FF 00"
-            if (length <= 7) {
-                message_data   = data; // bogus pointer, will not be used
-                message_length = 0;
-                if (length <= 5) {
-                    type_id = 0; // has also an empty type_id
-                } else {
-                    type_id = (data[4] << 8) + data[5] + 256;
-                }
-            } else {
-                type_id        = (data[4] << 8) + data[5] + 256;
-                message_length = length - 7; // remove 6 byte header plus CRC
-                message_data   = data + 6;   // message block starts at 7th position
+            if (length > 8) {
+                message_length -= 7; // remove 6 byte header plus CRC
+                message_data += 6;   // message block starts at 7th position
+            }
+            if (length > 5) {
+                type_id = (data[4] << 8) + data[5] + 256; // set type_id if there is one
             }
         } else {
             // its F9 or F7
             uint8_t shift = (data[4] != 0xFF) ? 1 : 0; // true (1) if 5th byte is not 0xFF, then telegram is 1 byte longer
             type_id       = (data[5 + shift] << 8) + data[6 + shift] + 256;
-            message_data  = data + 6 + shift; // there is a special byte after the typeID which we ignore for now
-            if (length <= (9 + shift)) {
-                message_length = 0; // special broadcast on ems+ have no data values
-            } else {
-                message_length = length - (9 + shift);
+            message_data += 6 + shift; // there is a special byte after the typeID which we ignore for now
+            if (length > (9 + shift)) {
+                message_length -= (9 + shift);
             }
         }
     }
@@ -316,26 +304,27 @@ void RxService::add(uint8_t * data, uint8_t length) {
         return;
     }
 
+    // if we're in "trace" and "raw" print out actual telegram as bytes to the console
+    if (EMSESP::watch() == 2) {
+        uint16_t trace_watch_id = EMSESP::watch_id();
+        if ((trace_watch_id == WATCH_NONE) || (src == trace_watch_id) || (dest == trace_watch_id) || (type_id == trace_watch_id)) {
+            LOG_INFO(F("Rx: %s"), Helpers::data_to_hex(data, length).c_str());
+        }
+    }
+
+#ifdef EMSESP_DEBUG
+    LOG_DEBUG(F("[DEBUG] New Rx [#%d] telegram, message length %d"), rx_telegram_id_, message_length);
+#endif
+
     // create the telegram
     auto telegram = std::make_shared<Telegram>(Telegram::Operation::RX, src, dest, type_id, offset, message_data, message_length);
 
     // check if queue is full, if so remove top item to make space
     if (rx_telegrams_.size() >= MAX_RX_TELEGRAMS) {
-        // rx_telegrams_overflow_ = true;
         rx_telegrams_.pop_front();
     }
 
-    // add to queue
-    LOG_DEBUG(F("New Rx [#%d] telegram, length %d"), rx_telegram_id_, message_length);
-    rx_telegrams_.emplace_back(rx_telegram_id_++, std::move(telegram));
-
-    // if we're in "trace" and "raw" print out actual telegram as bytes to the console
-    if (logger_.enabled(Level::TRACE) && EMSESP::trace_raw()) {
-        uint16_t trace_watch_id = EMSESP::trace_watch_id();
-        if ((trace_watch_id == LOG_TRACE_WATCH_NONE) || (src == trace_watch_id) || (dest == trace_watch_id) || (type_id == trace_watch_id)) {
-            LOG_TRACE(F("Rx: %s"), Helpers::data_to_hex(data, length).c_str());
-        }
-    }
+    rx_telegrams_.emplace_back(rx_telegram_id_++, std::move(telegram)); // add to queue
 }
 
 
@@ -380,7 +369,7 @@ void TxService::loop() {
 
 // sends a 1 byte poll which is our own device ID
 void TxService::send_poll() {
-    //LOG_TRACE(F("Ack %02X"),ems_bus_id() ^ ems_mask());
+    //LOG_DEBUG(F("Ack %02X"),ems_bus_id() ^ ems_mask());
     EMSuart::send_poll(ems_bus_id() ^ ems_mask());
 }
 
@@ -477,24 +466,19 @@ void TxService::send_telegram(const QueuedTxTelegram & tx_telegram) {
               tx_telegram.id_,
               telegram->to_string(telegram_raw, length).c_str());
 
-    // if we're watching an ID, then always show the full telegram
-    if ((logger_.enabled(Level::TRACE))
-        && ((telegram->src == EMSESP::trace_watch_id()) || (telegram->dest == EMSESP::trace_watch_id()) || (telegram->type_id == EMSESP::trace_watch_id()))) {
-        logger_.trace(F("Sending %s Tx [#%d], telegram: %s"),
-                      (telegram->operation == Telegram::Operation::TX_WRITE) ? F("write") : F("read"),
-                      tx_telegram.id_,
-                      telegram->to_string(telegram_raw, length).c_str());
-    }
-
     // send the telegram to the UART Tx
     uint16_t status = EMSuart::transmit(telegram_raw, length);
 #ifdef EMSESP_DEBUG
-    LOG_TRACE(F("Tx: %s"), Helpers::data_to_hex(telegram_raw, length).c_str());
+    // if watching in 'raw' mode
+    if (EMSESP::watch() == 2) {
+        LOG_INFO(F("[DEBUG] Tx: %s"), Helpers::data_to_hex(telegram_raw, length).c_str());
+    }
 #endif
 
-    if (status != EMS_TX_STATUS_OK) {
+    if (status == EMS_TX_STATUS_ERR) {
         LOG_ERROR(F("Failed to transmit Tx via UART."));
-        tx_waiting(false); // nothing send, tx not in wait state
+        increment_telegram_fail_count(); // another Tx fail
+        tx_waiting(false);               // nothing send, tx not in wait state
         return;
     }
 
@@ -514,11 +498,15 @@ void TxService::send_telegram(const uint8_t * data, const uint8_t length) {
 
     LOG_DEBUG(F("Sending Raw telegram: %s (length=%d)"), Helpers::data_to_hex(telegram_raw, length).c_str(), length);
 
+    tx_waiting(false); // no post validation
+
     // send the telegram to the UART Tx
     uint16_t status = EMSuart::transmit(telegram_raw, length);
-    //LOG_TRACE(F("Tx: %s"), Helpers::data_to_hex(telegram_raw, length).c_str());
-    if (status != EMS_TX_STATUS_OK) {
-        LOG_ERROR(F("Failed to transmit Tx via UART"));
+    //LOG_DEBUG(F("Tx: %s"), Helpers::data_to_hex(telegram_raw, length).c_str());
+
+    if (status == EMS_TX_STATUS_ERR) {
+        LOG_ERROR(F("Failed to transmit Tx via UART."));
+        increment_telegram_fail_count(); // another Tx fail
     }
 }
 
@@ -526,7 +514,9 @@ void TxService::send_telegram(const uint8_t * data, const uint8_t length) {
 // given some details like the destination, type, offset and message block
 void TxService::add(const uint8_t operation, const uint8_t dest, const uint16_t type_id, const uint8_t offset, uint8_t * message_data, const uint8_t message_length) {
     auto telegram = std::make_shared<Telegram>(operation, ems_bus_id(), dest, type_id, offset, message_data, message_length);
-    LOG_DEBUG(F("New Tx [#%d] telegram, length %d"), tx_telegram_id_, message_length);
+#ifdef EMSESP_DEBUG
+    LOG_DEBUG(F("[DEBUG] New Tx [#%d] telegram, length %d"), tx_telegram_id_, message_length);
+#endif
 
     // if the queue is full, make room but removing the last one
     if (tx_telegrams_.size() >= MAX_TX_TELEGRAMS) {
@@ -537,14 +527,17 @@ void TxService::add(const uint8_t operation, const uint8_t dest, const uint16_t
 }
 
 // builds a Tx telegram and adds to queue, using only raw data
+// format is EMS 1.0 (src, dest, type_id, offset, data)
 // length is the length of the whole telegram data
-void TxService::add(uint8_t * data, const uint8_t length) {
-    uint8_t message_length = length - 4;
-    if (!message_length) {
-        LOG_ERROR(F("Bad Tx telegram, too short (message length is %d)"), message_length);
+// front = true if adding to the front of queue, e.g. with an Tx retry. Default is false.
+void TxService::add(uint8_t * data, const uint8_t length, bool front) {
+    if (length < 5) {
+        LOG_ERROR(F("Tx telegram too short (telegram length is %d)"), length);
         return;
     }
 
+    uint8_t message_length = length - 4;
+
     // build header
     uint8_t   src          = data[0];
     uint8_t   dest         = data[1];
@@ -559,8 +552,16 @@ void TxService::add(uint8_t * data, const uint8_t length) {
         tx_telegrams_.pop_front();
     }
 
-    LOG_DEBUG(F("New Tx [#%d] telegram, length %d"), tx_telegram_id_, message_length);
-    tx_telegrams_.emplace_back(tx_telegram_id_++, std::move(telegram));
+#ifdef EMSESP_DEBUG
+    LOG_DEBUG(F("[DEBUG] New Tx [#%d] telegram, length %d"), tx_telegram_id_, message_length);
+#endif
+
+    // add to either front or back of queue
+    if (front) {
+        tx_telegrams_.emplace_front(tx_telegram_id_++, std::move(telegram));
+    } else {
+        tx_telegrams_.emplace_back(tx_telegram_id_++, std::move(telegram));
+    }
 }
 
 // send a Tx telegram to request data from an EMS device
@@ -626,25 +627,8 @@ uint8_t TxService::retry_tx() {
         increment_telegram_fail_count(); // another Tx fail
         return 0;
     }
-   // if the queue is full, throw away
-    if (tx_telegrams_.size() >= MAX_TX_TELEGRAMS) {
-        reset_retry_count();             // give up
-        increment_telegram_fail_count(); // another Tx fail
-        return 0;
-    }
 
-    uint8_t message_length = telegram_last_length_ - 4;
-
-    // build header
-    uint8_t   src          = telegram_last_[0];
-    uint8_t   dest         = telegram_last_[1];
-    uint8_t   type_id      = telegram_last_[2];
-    uint8_t   offset       = telegram_last_[3];
-    uint8_t * message_data = telegram_last_ + 4;
-
-    auto telegram = std::make_shared<Telegram>(Telegram::Operation::TX_RAW, src, dest, type_id, offset, message_data, message_length);
-
-    tx_telegrams_.emplace_front(tx_telegram_id_++, std::move(telegram));
+    add(telegram_last_, telegram_last_length_, true); // add the last Tx telegram to the front of the tx queue, at the top
 
     return retry_count_;
 }
diff --git a/src/telegram.h b/src/telegram.h
index 4c8608d82..b0d7192e9 100644
--- a/src/telegram.h
+++ b/src/telegram.h
@@ -23,7 +23,15 @@
 #include <deque>
 #include <memory> // for unique ptrs
 #include <vector>
-// #include <atomic> // for overflow
+
+// UART drivers
+#if defined(ESP8266)
+#include "uart/emsuart_esp8266.h"
+#elif defined(ESP32)
+#include "uart/emsuart_esp32.h"
+#elif defined(EMSESP_STANDALONE)
+#include <emsuart_standalone.h>
+#endif
 
 #include <uuid/log.h>
 
@@ -43,8 +51,8 @@ static constexpr int16_t  EMS_VALUE_SHORT_INVALID  = 0x8000;
 static constexpr uint32_t EMS_VALUE_ULONG_NOTSET   = 0xFFFFFFFF; // for 3-byte and 4-byte longs
 static constexpr uint32_t EMS_VALUE_ULONG_INVALID  = 0x80000000;
 
-static constexpr uint8_t EMS_MAX_TELEGRAM_LENGTH         = 32;                          // max length of a telegram
-static constexpr uint8_t EMS_MAX_TELEGRAM_MESSAGE_LENGTH = EMS_MAX_TELEGRAM_LENGTH - 5; // max length of message block
+static constexpr uint8_t EMS_MAX_TELEGRAM_LENGTH         = 32; // max length of a complete EMS telegram
+static constexpr uint8_t EMS_MAX_TELEGRAM_MESSAGE_LENGTH = 27; // max length of message block, assuming EMS1.0
 
 namespace emsesp {
 
@@ -170,7 +178,6 @@ class RxService : public EMSbus {
     RxService()  = default;
     ~RxService() = default;
 
-    void start();
     void loop();
 
     void add(uint8_t * data, uint8_t length);
@@ -210,7 +217,6 @@ class RxService : public EMSbus {
     static constexpr uint32_t RX_LOOP_WAIT   = 800; // delay in processing Rx queue
     uint32_t                  last_rx_check_ = 0;
 
-    // std::atomic<bool> rx_telegrams_overflow_{false};
     uint8_t rx_telegram_id_ = 0; // queue counter
 
     uint16_t telegram_count_       = 0; // # Rx received
@@ -234,7 +240,7 @@ class TxService : public EMSbus {
     void send();
 
     void add(const uint8_t operation, const uint8_t dest, const uint16_t type_id, const uint8_t offset, uint8_t * message_data, const uint8_t message_length);
-    void add(uint8_t * data, const uint8_t length);
+    void add(uint8_t * data, const uint8_t length, bool front = false);
 
     void read_request(const uint16_t type_id, const uint8_t dest, const uint8_t offset = 0);
 
diff --git a/src/uart/emsuart_esp32.cpp b/src/uart/emsuart_esp32.cpp
index 091363cec..d4dc5d2b5 100644
--- a/src/uart/emsuart_esp32.cpp
+++ b/src/uart/emsuart_esp32.cpp
@@ -122,7 +122,12 @@ void EMSuart::start(uint8_t tx_mode) {
         .parity    = UART_PARITY_DISABLE,
         .stop_bits = UART_STOP_BITS_1,
         .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
-    };
+    }
+    if (tx_mode_ == 5) {
+        EMS_UART.conf0.stop_bit_num = UART_STOP_BITS_1_5;
+    } else {
+        EMS_UART.conf0.stop_bit_num = UART_STOP_BITS_1;
+    }
 
     ESP_ERROR_CHECK(uart_param_config(EMSUART_UART, &uart_config));
     ESP_ERROR_CHECK(uart_set_pin(EMSUART_UART, EMSUART_TXPIN, EMSUART_RXPIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE));
@@ -161,7 +166,12 @@ void EMSuart::restart() {
     EMS_UART.int_ena.brk_det = 1; // activate only break
     emsTxBufIdx = 0;
     emsTxBufLen = 0;
-};
+    if (tx_mode_ == 5) {
+        EMS_UART.conf0.stop_bit_num = UART_STOP_BITS_1_5;
+    } else {
+        EMS_UART.conf0.stop_bit_num = UART_STOP_BITS_1;
+    }
+}
 
 /*
  * Sends a 1-byte poll, ending with a <BRK>
@@ -186,7 +196,7 @@ void EMSuart::send_poll(uint8_t data) {
  */
 uint16_t EMSuart::transmit(uint8_t * buf, uint8_t len) {
     if (len == 0 || len > 32) {
-        return EMS_TX_STATUS_ERROR;
+        return EMS_TX_STATUS_ERR;
     }
     if (tx_mode_ == EMS_TXMODE_NEW || tx_mode_ == 5) {
         for (uint8_t i = 0; i < len; i++) {
diff --git a/src/uart/emsuart_esp32.h b/src/uart/emsuart_esp32.h
index 4e958469e..000a20c00 100644
--- a/src/uart/emsuart_esp32.h
+++ b/src/uart/emsuart_esp32.h
@@ -58,7 +58,7 @@
 namespace emsesp {
 
 #define EMS_TX_STATUS_OK 1
-#define EMS_TX_STATUS_ERROR 0
+#define EMS_TX_STATUS_ERR 0
 
 class EMSuart {
   public:
diff --git a/src/uart/emsuart_esp8266.cpp b/src/uart/emsuart_esp8266.cpp
index d77a77de3..1b1468f89 100644
--- a/src/uart/emsuart_esp8266.cpp
+++ b/src/uart/emsuart_esp8266.cpp
@@ -35,6 +35,7 @@ uint8_t               phantomBreak = 0;
 uint8_t               tx_mode_     = 0xFF;
 bool                  drop_next_rx = true;
 uint32_t              emsRxTime;
+// uint32_t              emsTxTime = 0;
 uint8_t               emsTxBuf[EMS_MAXBUFFERSIZE];
 uint8_t               emsTxBufIdx;
 uint8_t               emsTxBufLen;
@@ -88,7 +89,10 @@ void ICACHE_FLASH_ATTR EMSuart::emsuart_recvTask(os_event_t * events) {
         phantomBreak = 0;
         length--; // remove phantom break from Rx buffer
     }
-
+    // if (emsTxTime > 0) {
+    //     LOG_INFO(F("tx duration: %d ms"), uuid::get_uptime() - emsTxTime);
+    //     emsTxTime = 0;
+    // }
     // it's a poll or status code, single byte and ok to send on, then quit
     if (length == 2) {
         EMSESP::incoming_telegram((uint8_t *)pCurrent->buffer, 1);
@@ -124,7 +128,7 @@ void ICACHE_RAM_ATTR EMSuart::emsuart_tx_timer_intr_handler() {
     } else if (emsTxBufIdx == emsTxBufLen) {
         USC0(EMSUART_UART) |= (1 << UCBRK); // set <BRK>
         if (tx_mode_ > 5 || tx_mode_ < 11) {
-        timer1_write(5 * EMSUART_TX_BIT_TIME * 11);
+            timer1_write(5 * EMSUART_TX_BIT_TIME * 12);
             USIE(EMSUART_UART) &= ~(1 << UIBD); // disable break interrupt
         }
     } else if (USC0(EMSUART_UART) & (1 << UCBRK)) {
@@ -258,10 +262,10 @@ void ICACHE_FLASH_ATTR EMSuart::tx_brk() {
     ETS_UART_INTR_DISABLE();
     USC0(EMSUART_UART) |= (1 << UCBRK); // set bit
 
-    if (tx_mode_ == EMS_TXMODE_EMSPLUS) {           // EMS+ mode
-        delayMicroseconds(EMSUART_TX_BRK_WAIT);     // 2070
-    } else if (tx_mode_ == EMS_TXMODE_HT3) {        // junkers mode
-        delayMicroseconds(EMSUART_TX_BRK_WAIT_HT3); // 1144
+    if (tx_mode_ == EMS_TXMODE_EMSPLUS) {        // EMS+ mode
+        delayMicroseconds(EMSUART_TX_WAIT_PLUS); // 2070
+    } else {                                     // junkers and EMS1.0
+        delayMicroseconds(EMSUART_TX_WAIT_BRK);  // 1144
     }
 
     USC0(EMSUART_UART) &= ~(1 << UCBRK); // clear BRK bit
@@ -283,10 +287,17 @@ void EMSuart::send_poll(uint8_t data) {
     } else if (tx_mode_ >= EMS_TXMODE_NEW) { // hardware controlled modes
         USF(EMSUART_UART) = data;
         USC0(EMSUART_UART) |= (1 << UCBRK); // send <BRK> at the end
-    } else { // software controlled modes
-        // EMS1.0, EMS+ and HT3
+    } else if (tx_mode_ == EMS_TXMODE_HT3) {
         USF(EMSUART_UART) = data;
-        delayMicroseconds(EMSUART_TX_BRK_WAIT);
+        delayMicroseconds(EMSUART_TX_WAIT_HT3);
+        tx_brk(); // send <BRK>
+    } else if (tx_mode_ == EMS_TXMODE_EMSPLUS) {
+        USF(EMSUART_UART) = data;
+        delayMicroseconds(EMSUART_TX_WAIT_PLUS);
+        tx_brk(); // send <BRK>
+    } else { // EMS1.0
+        USF(EMSUART_UART) = data;
+        delayMicroseconds(EMSUART_TX_WAIT_BRK);
         tx_brk(); // send <BRK>
     }
 }
@@ -303,6 +314,7 @@ uint16_t ICACHE_FLASH_ATTR EMSuart::transmit(uint8_t * buf, uint8_t len) {
 #ifdef EMSESP_DEBUG
     // LOG_INFO(F("[DEBUG] UART Response time: %d ms"), uuid::get_uptime() - emsRxTime);
 #endif
+    // emsTxTime = uuid::get_uptime();
     // if ((uuid::get_uptime() - emsRxTime) > EMS_RX_TO_TX_TIMEOUT)) { // send allowed within 20 ms
     //      return EMS_TX_STATUS_ERR;
     // }
@@ -317,6 +329,8 @@ uint16_t ICACHE_FLASH_ATTR EMSuart::transmit(uint8_t * buf, uint8_t len) {
         emsTxBufIdx = 0;
         emsTxBufLen = len;
         USF(EMSUART_UART) = buf[0];
+        // timer1_attachInterrupt(emsuart_tx_timer_intr_handler); // Add ISR Function
+        // timer1_enable(TIM_DIV16, TIM_EDGE, TIM_SINGLE);        // 5 MHz timer
         timer1_write(emsTxWait);
         return EMS_TX_STATUS_OK;
     }
@@ -334,7 +348,7 @@ uint16_t ICACHE_FLASH_ATTR EMSuart::transmit(uint8_t * buf, uint8_t len) {
     if (tx_mode_ == EMS_TXMODE_EMSPLUS) { // With extra tx delay for EMS+
         for (uint8_t i = 0; i < len; i++) {
             USF(EMSUART_UART) = buf[i];
-            delayMicroseconds(EMSUART_TX_BRK_WAIT); // 2070
+            delayMicroseconds(EMSUART_TX_WAIT_PLUS); // 2070
         }
         tx_brk(); // send <BRK>
         return EMS_TX_STATUS_OK;
@@ -350,7 +364,7 @@ uint16_t ICACHE_FLASH_ATTR EMSuart::transmit(uint8_t * buf, uint8_t len) {
                 ;
 
             // wait until bits are sent on wire
-            delayMicroseconds(EMSUART_TX_BRK_WAIT_HT3);
+            delayMicroseconds(EMSUART_TX_WAIT_HT3);
         }
         tx_brk(); // send <BRK>
         return EMS_TX_STATUS_OK;
diff --git a/src/uart/emsuart_esp8266.h b/src/uart/emsuart_esp8266.h
index 26ca2478c..1923b2f2e 100644
--- a/src/uart/emsuart_esp8266.h
+++ b/src/uart/emsuart_esp8266.h
@@ -42,13 +42,16 @@
 
 // LEGACY
 #define EMSUART_TX_BIT_TIME 104  // bit time @9600 baud
-#define EMSUART_TX_BRK_WAIT 2070 // the BRK from Boiler master is roughly 1.039ms, so accounting for hardware lag using around 2078 (for half-duplex) - 8 (lag)
+#define EMSUART_TX_WAIT_BRK (EMSUART_TX_BIT_TIME * 11) // 1144
 
 // EMS 1.0
 #define EMSUART_TX_BUSY_WAIT (EMSUART_TX_BIT_TIME / 8) // 13
 
-// HT3/Junkers - Time to send one Byte (8 Bits, 1 Start Bit, 1 Stop Bit). The -8 is for lag compensation.
-#define EMSUART_TX_BRK_WAIT_HT3 (EMSUART_TX_BIT_TIME * 11) - 8 // 1136
+// HT3/Junkers - Time to send one Byte (8 Bits, 1 Start Bit, 1 Stop Bit) plus 7 bit delay. The -8 is for lag compensation.
+#define EMSUART_TX_WAIT_HT3 (EMSUART_TX_BIT_TIME * 17) - 8 // 1760
+
+// EMS+ - Time to send one Byte (8 Bits, 1 Start Bit, 1 Stop Bit) and delay of another Bytetime.
+#define EMSUART_TX_WAIT_PLUS 2070
 
 namespace emsesp {
 
diff --git a/src/version.h b/src/version.h
index 01841a477..5393f3853 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1 +1 @@
-#define EMSESP_APP_VERSION "2.0.0a17"
+#define EMSESP_APP_VERSION "2.0.0a18"