I received RFID SA810 reader. Do you have docs for MQTT. I do not see it in sdk. If you have the same question, please refer to the "Instructions for actively uploading custom data format settings" Configuration Content: { "MAC":"", "EPC":"", } Proactively submit data: { “MAC”:”376F16853143”, "EPC":"0102030405060708B97A4625” } Proactively submit heartbeat data: { “MAC”:” 376F16853143”, "EPC":"" }