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WSAL21705 – RM500U-CN 5G 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

Concise technical guide for the Waveshare M.2 to 4G/5G HAT with RM500U-CN: board overview, modules, AT commands, and integration on Windows, Raspberry Pi, and Jetson Nano.

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Technical overview

  • The board has a standard M.2 B-key slot compatible with RM500U-CN, RM500Q-GL, RM500Q-AE and RM502Q-AE 5G modules.
  • A USB 3.1 port (USB 2.0 backward compatible) connects the HAT to a PC, Raspberry Pi or Jetson Nano host.
  • Two SIM card slots are onboard; SIM1 is active by default, SIM2 is on the back and requires module support plus AT-command switching.
  • An onboard voltage level translator is enabled via a DIP switch to expose UART, PWR and RST control pins for hosts such as Raspberry Pi or Arduino.
  • A USB Type-C connector accepts 5 V / 3 A input for stable external power; a separate power switch controls module power.
  • Four antenna connectors are provided; a cooling fan cools both the Raspberry Pi and the 5G module simultaneously.
  • Power consumption values depend on the selected module; the source lists figures such as 78 µA at shutdown and up to about 69 mA at USB 3.0 idle, varying by module variant.
  • For first use under Linux, the USB device descriptor must be loaded; afterwards network access can be obtained via RNDIS or ECM dial-up.

Commands and examples – verify before use:  

AT
ATE0
ATE1
AT+CGMI
AT+CGMM
AT+CGSN
AT+CSUB
AT+QGMR
AT+IPR?
AT+CFUN=1,1
AT+QUIMSLOT?
AT+QUIMSLOT=1
AT+QUIMSLOT=2
AT+CPIN?
AT+COPS?
AT+CEREG?
AT+C5GREG?
AT+QENG="servingcell"
AT+QNWPREFCFG="mode_pref",AUTO
AT+QNWPREFCFG="mode_pref",NR5G

Notes and version constraints

  • Not all features (e.g., GNSS, voice calls via the headphone jack) are supported by every compatible module – verify which module is installed before deployment.
  • Dual-SIM functionality requires explicit module support; some modules lack this capability.
  • Some steps are version-sensitive: e.g., OpenWrt flashing, driver installation on Windows, or loading the USB device descriptor on Linux may vary by OS version.
  • Compatibility with M.2 modules other than the listed 5G series must be checked against the pinout diagram; not every arbitrary M.2 module will work out of the box.
  • When using with Jetson Nano: other Nano variants may need an adapter cable; Orin Nano systems require a verified JetPack 6.0 (Ubuntu 22.04) image.

Source and revision record

  • RM500U-CN 5G HAT - Waveshare Wiki
  • Source revision: 73402
  • Captured: 2026-09-03T03:19:07+00:00
  • SHA-256: f1647167648d0688069d6aa4ad6c0c43fd02ee8da8f26d5b18a471bf97f6d0d5
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