Mqtt over sim868 GRPS

Hello everyone !

I follow the tutoriel of Ravi, for connect cloudMqtt over GPRS. I transform the original paquet but, the sim close the connection and nothing appears on cloudMQTT.

Do I need send both packets (suscribe and connects) at the same time ?

Please could you help me please :slight_smile:

You have to send connect packet and then you can see ack bytes from server. If connection closes after you send connect packet. Your packet formation is wrong.