From b10c89505ca81a93851b7b0bc660795f9c656904 Mon Sep 17 00:00:00 2001
From: "Adrian A. Baumann" <ade@adebaumann.com>
Date: Sat, 27 Jun 2026 01:44:32 +0200
Subject: [PATCH] Retain HA command messages so values survive restarts

---
 src/main.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/main.cpp b/src/main.cpp
index 69eebce..b909983 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -258,6 +258,7 @@ static void mqttPublishDiscovery() {
     doc["name"]              = name;
     doc["state_topic"]       = stat;
     doc["command_topic"]     = stat + "/set";
+    doc["retain"]                = true;  // HA publishes commands retained so values survive restarts
     doc["availability_topic"]    = String(mqttCfg.prefix) + "/status";
     doc["payload_available"]     = MQTT_PAYLOAD_AVAILABLE;
     doc["payload_not_available"] = MQTT_PAYLOAD_NOT_AVAILABLE;