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MQTT: add Homeassistant discovery message

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This commit is contained in:
Marcel Walter 2026-01-16 23:16:41 +01:00
parent f81326f3ef
commit d21db10795
1 changed files with 55 additions and 0 deletions
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55
src/main.cpp
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@ -34,6 +34,59 @@ void publishClose()
mqtt.publish(FLIPDOT_TEXT_TOPIC "/state", Text.c_str());
}
void publishHomeAssistantDiscovery()
{
auto mac = WiFi.macAddress();
mac.replace(":", "_");
JsonDocument doc;
JsonObject device = doc["dev"].to<JsonObject>();
device["ids"] = mac;
device["name"] = "FlipDotDisplay";
device["mf"] = "-mf-";
device["mdl"] = "-mdl-";
device["sw"] = "-sw-";
device["sn"] = "-sn-";
device["hw"] = "-hw-";
JsonObject origin = doc["o"].to<JsonObject>();
origin["name"] = "Hobbyhimmel";
origin["sw"] = "-sw-";
origin["url"] = "https://hobbyhimmel.de";
JsonObject components = doc["cmps"].to<JsonObject>();
JsonObject sw = components["FlipDotDisplaySwitch"].to<JsonObject>();
sw["unique_id"] = mac + "FlipDotDisplaySwitch";
sw["p"] = "switch";
sw["command_topic"] = FLIPDOT_SWITCH_TOPIC;
sw["state_topic"] = FLIPDOT_SWITCH_TOPIC "/state";
sw["payload_on"] = "open";
sw["payload_off"] = "close";
sw["qos"] = 0;
sw["retain"] = false;
JsonObject txt = components["FlipDotDisplayText"].to<JsonObject>();
sw["unique_id"] = mac + "FlipDotDisplayText";
sw["p"] = "text";
sw["command_topic"] = FLIPDOT_TEXT_TOPIC;
sw["state_topic"] = FLIPDOT_TEXT_TOPIC "/state";
sw["qos"] = 0;
sw["retain"] = false;
doc["availability_topic "] = FLIPDOT_AVAILABILITY_TOPIC;
String jsonString;
serializeJson(doc, jsonString);
String discoveryTopic = "homeassistant/device/";
discoveryTopic += mac + "/config";
mqtt.publish(discoveryTopic.c_str(), jsonString.c_str());
Serial.print("Homeassistant Discovery was published: ");
Serial.println(jsonString);
}
/* ------------ OTA section and variables -------------- */
bool OTAStarted;
void onOTAStart()
@ -196,6 +249,8 @@ void loop()
mqtt.subscribe(FLIPDOT_SWITCH_TOPIC);
mqtt.subscribe(FLIPDOT_TEXT_TOPIC);
mqtt.publish(FLIPDOT_AVAILABILITY_TOPIC, "available");
publishHomeAssistantDiscovery();
}
}
}