Customize MQTT topics

Hi:

Is there a way to customize the topics that Shelly devices subscribe to or listen to? I have 2 shelly devices, one acting as a switch, and one acting as a relay. I'd like for them to communicate over MQTT without having to write an automation script or using any other 3rd party software (other than Mosquitto)

Thanks,
Marc

Yes, you can always accomplish this with calling the API directly, but I'm trying to avoid that. I want to standardize all device communication (not just between Shellies, but also with others like Sonoff) on MQTT.

After more research I think the best way to accomplish device to device communication over MQTT, is to flash the Shelly devices with ESPHome and then configure MQTT topics in YAML.

Just to close this topic. I did flash my Shelly devices with ESPHome and I've been very happy with the MQTT support. The Shelly devices are auto-discovered by HA (without the need for any special script), and you have full control over the topic structure through your ESPHome YAML configuration.