I am are trying to use a sim800L module to connect an esp32 running Arduino to AWS MQTT. I need to connect and publish and subscribe to topics. I am doing this successfully via WiFi. Not via the sim800L GSM module. I cannot find any example code. Something should be done with Amazon security certificates (private, certificate, and root).

Anyway, can you provide me with a working code/library for this application? Or perhaps another workaround?

  • 1
    security procedure and certificates that you are using over WiFi should also be adopted in the cellular configuration. So, I suggest you follow the same approach.
    – rebatoma
    Dec 7, 2020 at 11:24

1 Answer 1


I also have the same issue!! Did you find any resolution for the same?
Found this url, https://github.com/vshymanskyy/TinyGSM/tree/master/examples%2Fmore%2FSIM800_SslSetCert

And https://github.com/vshymanskyy/TinyGSM/issues/136

yet to try these..

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