I know this is an old conversation but has anyone managed a long term solution to the Turn ON problem with the DFRobot SIM7000E shield.
I have been struggling for some time to correct the issue but so far no success.
I have used the examples and libraries from the DFRobot site https://wiki.dfrobot.com/SIM7000_Arduino_NB-IoT_LTE_GPRS_Expansion_Shield_SKU__DFR0505_DFR0572
and the modifies code for the library file suggested in SIM7000E expansion shield with Arduin Lenardo
I had a reliable system running on SMS messages to run a genset, pumps and valves. Since the closure of 3G where I live, the system no longer works. I simply want a shield that I can read SMS messages. I can then pass those messages along to my control system.
If the DFRobot SIM700E shield is not the best choice, I would gratefully accept advice.
