After many attempts to send data or messages with SparkFun’s Cat-M1-R410 I found this update for the same module on Nova. It was facing the same issue we have with SparkFun’s shield.
I contacted SparkFun’s and they told me to contact Hologram support for the firmware update. How could we update the firmware for Cat-M1-R410 that resides on SparkFun’s shield ?
I get connection but there is no data or messages transmission and the module stuck when it opens a socket !
This AT command stuck forever !