The above is an example of Weixue. In my case, the second and fourth items need to be changed
AT+CMQCON=0,3,”myclient”,6000,0,0,”admin”,”password” You need to add admin and password. If you don’t add it, you cannot connect.
SIM7020C NB-IoT MQTT communication Raspberry Pi 4B – Programmer Sought was last modified: June 12th, 2021 by