Good Evening (from Arizona), I have a Sparkfun LTE Cat M1/NB-IoT Shield. It works great using the Sparkfun library for its limited examples, but I wanted to branch out and use my shield for more, such as using it as an MQTT client. I have been researching using TinyGSM as it has an MQTT example, however, the library will not communicate with my modem whatsoever. Using the diagnostics tools and serial passthrough examples from TinyGSM, I cannot get any kind of response from my modem. I have selected the correct modem(SaraR4) and am using the same Rx/Tx as the sparkfun example uses, but still nothing.
Thank you for any insight you may have.