From df1204d92fa24a7d90beb4e834d31d435d7dc311 Mon Sep 17 00:00:00 2001
From: Ben Fulton <fulton.benjamin@gmail.com>
Date: Sun, 15 Feb 2026 16:35:22 -0500
Subject: [PATCH] [DISC] Add HASS_UNIT_PPM to availableHASSUnits array (#2279)

HASS_UNIT_PPM is defined in config_mqttDiscovery.h but was missing from
the availableHASSUnits validation array in mqttDiscovery.cpp. This caused
unit_of_measurement to be silently dropped for CO2 sensors (like the
Govee H5140) during MQTT discovery, resulting in Home Assistant warnings
about invalid units.
---
 main/mqttDiscovery.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/main/mqttDiscovery.cpp b/main/mqttDiscovery.cpp
index 6a249e9d..ef07780f 100644
--- a/main/mqttDiscovery.cpp
+++ b/main/mqttDiscovery.cpp
@@ -127,6 +127,7 @@ static const char* const availableHASSUnits[] = {
     HASS_UNIT_UGM3,
     HASS_UNIT_OHM,
     HASS_UNIT_PERCENT,
+    HASS_UNIT_PPM,
     HASS_UNIT_DEGREE,
     HASS_UNIT_CELSIUS,
     HASS_UNIT_FAHRENHEIT,