B4R Question Sending MQTT messages with gprs shield?

[corwin42]

Hello,

I'm very new to Arduino and B4R and I'm still learning the basics.

My goal is to create a piece of hardware which is able to communicate with an MQTT broker over a GSM/GPRS shield.

I know there is an MQTT tutorial for B4R but this uses an ethernet connection. There is also a tutorial for gsm/gprs communication but this uses only SMS messages to communicate.

Is it possible to create a connection to an MQTT broker over GPRS? The hardware will work in my car so there is no way to use wifi. I need to use gsm/gprs connection.

 

[Erel]

The Arduino GSM library was not wrapped yet. The SMS implementation is a custom implementation based on the AT commands.

I will try to wrap it as this is indeed an interesting feature.

 

[Erel]

I've created an example of sending http requests with the GSM shield: https://www.b4x.com/android/forum/threads/http-requests-with-gsm-shield.81382/
The implementation is based on the internal AT modem. Creating a TCP connection is a pretty complicated task, especially as there are all kinds of shields with different modules.

I recommend you to plan the solution based on http requests.

 

[corwin42]

Hmm, then I will need to run/host a http server which is what I want to avoid.

 

[Erel]

You can use IO Adafruit. It works with both MQTT and HTTP.

 

[corwin42]

This sounds like a great solution. Thanks.