Change the listening MHz on LILYGO

Received a LILYGO LoRa32 V2.1_1.6, got OMG installed and it is talking to the Mosquitto broker on Home Assistant. I am seeing data coming in from discovered devices on the 433 MHz. How do I change the listening MHz to 345 MHz to pick up my wireless window sensors? I have read the frequency can be changed by sending a message with the new parameter. How do you send a message??? I have tired using the MQTT UI in HA and sending a payload with no luck. Any idea’s?

Personally I use MQTT Explorer to explorer the MQTT messages created by the boards. And with MQTT Explorer you can also publish messages as well.

Looking at your screen shot you likely have the incorrect prefix on the MQTT Topic for your board.

In the example here, RF gateways (433mhz/315mhz) | OpenMQTTGateway v1.5.1

You need to substitute home/OpenMQTTGateway with the name of your board.