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WSAL17693 – SIM7080G Cat-M – 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 SIM7080G Cat-M/NB-IoT HAT by Waveshare is a HAT module for Raspberry Pi with integrated NB-IoT/Cat-M(eMTC) connectivity and GNSS positioning. It supports globally available frequency bands, various communication protocols, and provides UART, USB, and GPIO interfaces for connecting to host boards.

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Technical overview

  • Compatible with Raspberry Pi 2B/3B/Zero/Zero W via the standard 40-pin GPIO header.
  • Supports protocols: TCP, UDP, HTTP, HTTPS, TLS, DTLS, PING, LWM2M, COAP, MQTT.
  • GNSS reception: GPS, GLONASS, BeiDou, Galileo; NMEA-0183 output; active antenna required.
  • NB-IoT frequency bands: B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B25/B26/B28/B66/B71/B85.
  • Cat-M frequency bands: B1/B2/B3/B4/B5/B8/B12/B13/B14/B18/B19/B20/B25/B26/B27/B28/B66/B85.
  • Data rates: NB-IoT UL ≤150 kbps / DL ≤136 kbps; Cat-M UL ≤1119 kbps / DL ≤589 kbps.
  • Power supply: 5 V; logic level selectable between 3.3 V (default) or 5 V via jumper.
  • Operating temperature: −40 °C to +85 °C; dimensions: 30.5 mm × 65 mm.

Commands and examples – verify before use:  

AT
AT+CPIN?
AT+CNMP=38
AT+CMNB=2
AT+CSQ
AT+CGREG?
AT+CGNAPN
AT+CPSI?
AT+CNACT=0,1
AT+CNACT?
AT+CNCAT=0,0
AT+SMCONF
AT+CSSLCFG
AT+SMSSL
AT+SMCONN
AT+SMPUB
AT+SMSUB
AT+SMUNSUB
AT+SMSTATE
AT+SMPUBHEX

Notes and version constraints

  • Only 1.8 V SIM cards are supported; 3 V cards are not available.
  • Network registration may be delayed; local mobile providers should be consulted.
  • Ordinary phone SIM cards are not supported; an NB-IoT or eMTC-capable card is required.
  • Cellular network and GNSS positioning cannot be used simultaneously according to the source.
  • If there is no signal: fix the network mode (AT+CMNB=2 for NB-IoT, AT+CMNB=1 for Cat-M) and set LTE mode (AT+CNMP=38).
  • Sample files referenced in the source (e.g., code archive) should be verified for completeness and version before use.
  • Some steps are version-sensitive; when in doubt, have a human confirm the configuration.

Source and revision record

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