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WSAL20681 – SIM7000G NB-IoT HAT/en

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Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The SIM7000G is a global NB-IoT/Cat-M/EDGE/GPRS HAT for Raspberry Pi, with GNSS capability and worldwide band support.

Related products at JW Tech

Technical overview

  • Compatible with Raspberry Pi 2B/3B/3B+/Zero W
  • Supports NB-IoT, Cat-M, EDGE and GPRS across the global spectrum
  • Connects via the Raspberry Pi's serial (UART) interface
  • GNSS reception requires an external GPS antenna and clear sky visibility
  • To access the NB-IoT network, set parameters CNMP=38, CMNB=2, and NBSC=1
  • The device supports various protocols: MQTT, HTTP(S), FTP, NTP, PING, TCPIP, SSL, SAT, and FOTA
  • Firmware can be updated using the 'sim7000 qdl v1.43' tool; administrator privileges are required
  • There are two schematic versions: before May 1, 2021, and after

Commands and examples – verify before use:  

AT+CNMP=38
AT+CMNB=2
AT+NBSC=1

Notes and version constraints

  • Exact compatibility list for all Pi models must be confirmed by the manufacturer
  • GPS data reception does not work on rainy days or without clear sky visibility
  • PSM-mode power consumption was not fully explained in the source; measured ~700 uA vs theoretical 6 uA remains unexplained
  • Firmware updates often fail due to poor USB cables or missing drivers; exact resolution steps require manual verification
  • Compilation error of the BCM2835 library is resolved with 'autoreconf -vfi'; exact steps are version-sensitive

Source and revision record

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