I roughly measured the size of the pcb board. It is slightly larger than the inner opening of the 86 box of the white board and is easier to paste. Maybe the caliber you bought is different from mine, so you can measure it yourself. The project author address: https://github.com/1technophile/ OpenMQTTGateway firmware download address: https://sumju.net/wp-content/uploads/2020/04/OpenMQTTGateway_IR_RF_0.9.3.nodemcu.zip
Infrared receiving topic: home/OpenMQTTGateway/IRtoMQTT/ Infrared transmitting topic: home/OpenMQTTGateway/MQTTtoIR/
RF receiving topic: home/OpenMQTTGateway/433toMQTT/ RF transmitting topic: home/OpenMQTTGateway/MQTTto433/
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