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Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

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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.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL21705 WSAL21705 – RM500x / RM502x 5G HAT for Raspberry Pi, quad antennas LTE-A, multi band, 5G/4G/3G]
* [https://shop.jw-tech.eu/p/WSAL22348 WSAL22348 – RM500x / RM502x 5G HAT for Raspberry Pi, quad antennas LTE-A, multi band, 5G/4G/3G]
* [https://shop.jw-tech.eu/p/WSAL22531 WSAL22531 – RM500x / RM502x 5G HAT for Raspberry Pi, quad antennas LTE-A, multi band, 5G/4G/3G]
* [https://shop.jw-tech.eu/p/WSAL22704 WSAL22704 – RM500x / RM502x 5G HAT for Raspberry Pi, quad antennas LTE-A, multi band, 5G/4G/3G]
* [https://shop.jw-tech.eu/p/WSAL22705 WSAL22705 – RM500x / RM502x 5G HAT for Raspberry Pi, quad antennas LTE-A, multi band, 5G/4G/3G]
* [https://shop.jw-tech.eu/p/WSAL22706 WSAL22706 – RM500x / RM502x 5G HAT for Raspberry Pi, quad antennas LTE-A, multi band, 5G/4G/3G]
* [https://shop.jw-tech.eu/p/WSAL22707 WSAL22707 – RM500x / RM502x 5G HAT for Raspberry Pi, quad antennas LTE-A, multi band, 5G/4G/3G]

== 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:'''
<syntaxhighlight lang="text">
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
</syntaxhighlight>

== 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 ==
* [https://www.waveshare.com/wiki/RM500U-CN_5G_HAT RM500U-CN 5G HAT - Waveshare Wiki]
* Source revision: 73402
* Captured: 2026-09-03T03:19:07+00:00
* SHA-256: <code>f1647167648d0688069d6aa4ad6c0c43fd02ee8da8f26d5b18a471bf97f6d0d5</code>

WSAL21705 – RM500U-CN 5G HAT/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex