From c760218024b987584331c3f84485ea9b13ce0845 Mon Sep 17 00:00:00 2001
From: proddy <paul@derbyshire.nl>
Date: Thu, 16 Jul 2026 21:20:13 +0200
Subject: [PATCH] add UPTIME for HA UOM - #3146

---
 src/core/emsdevicevalue.h | 1 +
 src/core/mqtt.cpp         | 8 ++++++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/core/emsdevicevalue.h b/src/core/emsdevicevalue.h
index 25ca1875b..58154771d 100644
--- a/src/core/emsdevicevalue.h
+++ b/src/core/emsdevicevalue.h
@@ -81,6 +81,7 @@ class DeviceValue {
         HERTZ,        // 27 - Hz - frequency
         CONNECTIVITY, // 28 - used in HA - connectivity
         TIMESTAMP,    // 29 - used in HA - timestamp
+        UPTIME,       // 30 - used in HA - uptime for boot time
     };
 
     // TAG mapping - maps to DeviceValueTAG_s in emsdevicevalue.cpp
diff --git a/src/core/mqtt.cpp b/src/core/mqtt.cpp
index 5c77f7b9c..8063a2de8 100644
--- a/src/core/mqtt.cpp
+++ b/src/core/mqtt.cpp
@@ -587,7 +587,7 @@ void Mqtt::ha_status() {
 
     // These come from the info MQTT topic - and handled in the publish_ha_sensor_config function
     publish_system_ha_sensor_config(DeviceValueType::STRING, "Version", "version", DeviceValueUOM::NONE);
-    publish_system_ha_sensor_config(DeviceValueType::STRING, "Boot time", "bootTime", DeviceValueUOM::TIMESTAMP);
+    publish_system_ha_sensor_config(DeviceValueType::STRING, "Boot time", "bootTime", DeviceValueUOM::UPTIME);
 }
 
 // add sub or pub task to the queue.
@@ -1178,7 +1178,7 @@ void Mqtt::add_ha_classes(JsonObject doc, const uint8_t device_type, const uint8
         doc[uom_ha] = "L/h";
     } else if (uom == DeviceValueUOM::L) {
         doc[uom_ha] = "L";
-    } else if (uom == DeviceValueUOM::TIMESTAMP) {
+    } else if (uom == DeviceValueUOM::TIMESTAMP || uom == DeviceValueUOM::UPTIME) {
         // do nothing
     } else if (uom != DeviceValueUOM::NONE) {
         auto uom_str = EMSdevice::uom_to_string(uom);
@@ -1280,6 +1280,10 @@ void Mqtt::add_ha_classes(JsonObject doc, const uint8_t device_type, const uint8
         doc[sc_ha] = sc_ha_measurement;
         doc[dc_ha] = "timestamp";
         break;
+    case DeviceValueUOM::UPTIME:
+        doc[sc_ha] = sc_ha_measurement;
+        doc[dc_ha] = "uptime";
+        break;
     case DeviceValueUOM::MV:
     case DeviceValueUOM::VOLTS:
         doc[sc_ha] = sc_ha_measurement;