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Add ability to change MQTT topic and or gateway name by MQTT command. #1053

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Aug 5, 2021
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Add ability to change MQTT topic and or gateway name by MQTT command. #1053

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5383b3a
Add ability to change MQTT topic and or gateway name by MQTT command.
h2zero Aug 5, 2021
1cc16c6
Update example with /
1technophile Aug 5, 2021
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12 changes: 12 additions & 0 deletions docs/use/gateway.md
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Expand Up @@ -68,6 +68,18 @@ Server, port, and secure_flag are only required if changing connection to anothe
If the new connection fails the gateway will fallback to the previous connection.
:::

## Change the MQTT main topic and or gateway name
```
mosquitto_pub -t "home/OpenMQTTGateway/commands/MQTTtoSYS/config" -m
'{
"mqtt_topic": "topic/",
"gateway_name: "name"
}'
```
::: info
This will change the subscribed and published mqtt_topic/gateway_name that the gateway uses. No parameters are manditory, the current topic or gateway name will be used if not supplied.
:::

## Switching brokers and using self signed and client certificates

In the `user_config.h` file it is possible to specify multiple MQTT brokers and client certificates. These are commonly self signed and are supported by defining `MQTT_SECURE_SELF_SIGNED` as true or 1.
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12 changes: 12 additions & 0 deletions main/main.ino
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Expand Up @@ -2026,6 +2026,18 @@ void MQTTtoSYS(char* topicOri, JsonObject& SYSdata) { // json object decoding
# endif
}
# endif
if (SYSdata.containsKey("mqtt_topic") || SYSdata.containsKey("gateway_name")) {
if (SYSdata.containsKey("mqtt_topic")) {
strncpy(mqtt_topic, SYSdata["mqtt_topic"], mqtt_topic_max_size);
}
if (SYSdata.containsKey("gateway_name")) {
strncpy(gateway_name, SYSdata["gateway_name"], parameters_size * 2);
}
# ifndef ESPWifiManualSetup
saveMqttConfig();
# endif
client.disconnect(); // reconnects in loop using the new topic/name
}
#endif

#ifdef ZmqttDiscovery
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