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fix: store last_payload during MQTT topic discovery

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The discovery message handler was missing the payload parameter,
so topics were saved without their last value.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Christian Mueller 2026-04-06 20:40:56 +02:00
parent 73179f3040
commit 633d098206
1 changed files with 8 additions and 1 deletions
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9
display/middleware/src/modules/mqtt/topic-discovery.ts
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@ -93,11 +93,18 @@ export function startDiscovery(brokerId: number, prefix?: string): Promise<MqttT
resolve(getTopicsForBroker(brokerId));
};
const onMessage = (topic: string): void => {
const onMessage = (topic: string, payload: Buffer): void => {
const payloadStr = payload.toString();
if (!discoveredTopics.has(topic)) {
discoveredTopics.add(topic);
ensureTopicExists(brokerId, topic);
}
// Always update last_payload so the user sees the latest value
const db = getDb();
db.run(
'UPDATE mqtt_topics SET last_payload = ? WHERE broker_id = ? AND topic = ?',
[payloadStr, brokerId, topic]
);
};
if (existingClient && existingClient.connected) {