We are trying to send messages to our mqtt hub using an LTE module from Nimbelink, through the method of “Socket Dials”, these are AT Commands issued to the modem which uses an internal TCP/IP stack.
We would basically enter
which the modem answers with success
after that the only other command to use is at#xtcpsend=3, which opens a promt to enter whatever is going to be sent, we have tried sending mosquitto_pub string without success.
Sadly, Nimbelink only has an example using HTTP POST, sending to the promt something like this POST /dweet/for/xxxxxxxxxxxxxxx?hello=world, which works without a problem.
We wonder if you have an idea of what should be sent to the promt to actually send de data to the hub. Thanks in advance!