MQTT PUB topic with message {"firmware_version":"221.0.2", "serial_number":"SN-001"},how to do that?

I try to send AT+QMTPUB=0,1,1,0,“v1/devices/me/attributes”,"{\“firmware_version\”:\“221.0.2\”, \“serial_number\”:\“SN-001\”}", the server will receive {\ only.

what is the correct message format if want to send message with quotes?


AT Commands (by default) quotes in the quotes is not used

AizIO, thanks for your answer.
Is there a way to do that?

in direct JSON format… no way … encode/decode base64

no idea … ask Quectel FAE

thank you very much…