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BREAKING CHANGE: add dtu serial to mqtt status topics #304

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BREAKING CHANGE: add dtu serial to mqtt status topics #304

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10 changes: 6 additions & 4 deletions docs/MQTT_Topics.md
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Original file line number Diff line number Diff line change
Expand Up @@ -4,13 +4,15 @@ The base topic, as configured in the web GUI is prepended to all follwing topics

## General topics

serial will be replaced with the serial number of the OpenDTU device.

| Topic | R / W | Description | Value / Unit |
| --------------------------------------- | ----- | ---------------------------------------------------- | -------------------------- |
| dtu/ip | R | IP address of OpenDTU | IP address |
| dtu/hostname | R | Current hostname of the dtu (as set in web GUI) | |
| dtu/rssi | R | WiFi network quality | db value |
| dtu/[serial]/ip | R | IP address of OpenDTU | IP address |
| dtu/[serial]/hostname | R | Current hostname of the dtu (as set in web GUI) | |
| dtu/[serial]/rssi | R | WiFi network quality | db value |
| dtu/status | R | Indicates whether OpenDTU network is reachable | online / offline |
| dtu/uptime | R | Time in seconds since startup | seconds |
| dtu/[serial]/uptime | R | Time in seconds since startup | seconds |

## Inverter specific topics

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15 changes: 11 additions & 4 deletions src/MqttPublishing.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -22,11 +22,18 @@ void MqttPublishingClass::loop()
const CONFIG_T& config = Configuration.get();

if (millis() - _lastPublish > (config.Mqtt_PublishInterval * 1000)) {
MqttSettings.publish("dtu/uptime", String(millis() / 1000));
MqttSettings.publish("dtu/ip", NetworkSettings.localIP().toString());
MqttSettings.publish("dtu/hostname", NetworkSettings.getHostname());

// compose subtopic "dtu/<serialnumber>" with config.DtuSerial as hex
char dtu_subtopic[sizeof(uint64_t) * 8 + 5];
snprintf(dtu_subtopic, sizeof(dtu_subtopic), "dtu/%0x%08x",
((uint32_t)((config.Dtu_Serial >> 32) & 0xFFFFFFFF)),
((uint32_t)(config.Dtu_Serial & 0xFFFFFFFF)));

MqttSettings.publish(String(dtu_subtopic) + "/uptime", String(millis() / 1000));
MqttSettings.publish(String(dtu_subtopic) + "/ip", NetworkSettings.localIP().toString());
MqttSettings.publish(String(dtu_subtopic) + "/hostname", NetworkSettings.getHostname());
if (NetworkSettings.NetworkMode() == network_mode::WiFi) {
MqttSettings.publish("dtu/rssi", String(WiFi.RSSI()));
MqttSettings.publish(String(dtu_subtopic) + "/rssi", String(WiFi.RSSI()));
}

// Loop all inverters
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