Test MQTT with cellular modules

How to test MQTT with cellular modules?

Many cellular module vendors provide propriety AT commands to implement MQTT feature with the module. The other approach is to use a MQTT stack on the host platform and use the cellular module just for connectivity.  In either case, MQTT is a great option for sending data in a bandwidth constrained environment such as the cellular network.

Let us see how we can use the AT Command Tester tool to test MQTT feature with the cellular module. The AT Command Tester tool has built-in MQTT feature that be used to test on any network connection. Since you can also install MQTT broker on your local Windows machine, it will be easy to test, debug and trouble shoot your MQTT implementation.

Here are the steps,

• Setup a dial-up connection with the cellular module using the AT Command Tester tool
• Connect to the MQTT broker
• Send/Receive messages using the cellular connection

Set-up dial connection

Keywords: Module , M2M , GPRS , 3G , through AT commands,