From 111c1a0b4210de8d8411b2b77d9f47dec0639a7f Mon Sep 17 00:00:00 2001
From: proddy <paul@derbyshire.nl>
Date: Wed, 18 Sep 2019 16:39:39 +0200
Subject: [PATCH] ignore empty HC1 telegrams

---
 src/ems.cpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/ems.cpp b/src/ems.cpp
index d68469f40..aa4238119 100644
--- a/src/ems.cpp
+++ b/src/ems.cpp
@@ -1393,6 +1393,11 @@ void _process_RC30StatusMessage(_EMS_RxTelegram * EMS_RxTelegram) {
  * received every 60 seconds
  */
 void _process_RC35StatusMessage(_EMS_RxTelegram * EMS_RxTelegram) {
+    // ignore if first byte is 0x00
+    if (EMS_RxTelegram->data[0] == 0x00) {
+        return;
+    }
+
     uint8_t hc_num = _getHeatingCircuit(EMS_RxTelegram) - 1; // which HC is it?
 
     // check if setpoint temp sensor is unavailable
@@ -1402,8 +1407,6 @@ void _process_RC35StatusMessage(_EMS_RxTelegram * EMS_RxTelegram) {
 
     // check if current temp sensor is unavailable
     if (EMS_RxTelegram->data[EMS_OFFSET_RC35StatusMessage_curr] == 0x7D) {
-        EMS_Thermostat.hc[hc_num].curr_roomTemp = EMS_VALUE_SHORT_NOTSET;
-    } else {
         EMS_Thermostat.hc[hc_num].curr_roomTemp = _toShort(EMS_OFFSET_RC35StatusMessage_curr); // is * 10
     }