We took a closer look at the “Waveshare SIM7070G Cat-M/NB-IoT/GPRS HAT” for the Raspberry Pi and put it into operation. We uncovered various pitfalls and describe below how we set up the NB-IoT modem to connect one of our #AMPS nodes to the internet.

• Hardware:
  • Raspberry Pi 4 B
  • Mobilfunk-HAT: Waveshare SIM7070G Cat-M/NB-IoT/GPRS HAT
  • SIM-Karte: Telekom M2M
• Software: Raspbian 12 “Bookworm”

Because we had to find out the painful way: The Waveshare IO BASE Module B for the Raspberry Pi CM4 module does not work with the 4" DSI Touch Display from Waveshare - at least not as long as you use a BASE IO board revision < 4.

Only from board version 4 the higher performance DSI1 interface is used instead of the DSI0 interface of the Raspberry CM4 by the IO Base Board.