Quelltext der Seite WSAL18821 – Compute Module PoE 4G Board/en

__NOINDEX__
'''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 ==
Technical reference for the Waveshare board: compatibility, resources, image flashing and test commands.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL18821 WSAL18821 – Industrial IoT Mini-computer Add-ons, 4G / PoE Features, Based on Raspberry Pi Compute Module CM4S / CM3 / CM3+ Series]
* [https://shop.jw-tech.eu/p/WSAL18866 WSAL18866 – Compute Module Industrial IoT Base Board, 4G / PoE Feature, For Raspberry Pi CM4S / CM3 Series]
* [https://shop.jw-tech.eu/p/WSAL19061 WSAL19061 – Industrial IoT Mini-computer Add-ons, 4G / PoE Features, Based on Raspberry Pi Compute Module CM4S / CM3 / CM3+ Series]

== Technical overview ==
* Compatible with Raspberry Pi CM3, CM3 Lite, CM3+ and CM3+ Lite.
* Onboard SIM7600X module supports 4G/3G/2G via the SIM card slot.
* 10/100M Ethernet with PoE power over RJ45.
* 2.4 GHz Wi-Fi connection.
* Isolated industrial interfaces: CAN, RS485, RS232, ADC (16-bit), GPIO.
* USB HUB and USB-to-UART for serial debugging.
* Audio: 3.5 mm output and 4-pin speaker connector (8 Ω / 5 W).
* External RTC chip DS3231 with temperature sensor.
* Two CSI camera ports plus HDMI/DSI for displays.
* Industrial-grade aluminum alloy case.

'''Commands and examples – verify before use:''' 
<syntaxhighlight lang="text">
sudo apt-get update
sudo apt-get install raspberrypi-ui-mods
cd /boot/ && sudo dtc -I dts -O dtb -o /boot/dt-blob.bin dt-blob-disp1-cam2.dts
sudo raspivid -t 0 -cs 0
sudo raspivid -t 0 -cs 1
sudo raspi-config
sudo reboot
cd RS485/c/ && sudo make clean && sudo make && sudo ./main
cd RTC/python/ && sudo python examples/main.py
</syntaxhighlight>

== Notes and version constraints ==
* Flashing the eMMC requires administrator privileges on Windows 10; the process may be unstable on Windows 7 or Linux.
* Only the eMMC versions of CM3/CM3+ (identifiable by an extra IC on the back) can be flashed via USB Slave.
* The default credentials of the provided image are user 'pi' and password 'raspberry'; these should be changed after first boot.
* Do not write to other portable drives while flashing to avoid conflicts.
* The camera number in the '-cs' parameter may not match the board silkscreen; verify before testing.

== Source and revision record ==
* [https://www.waveshare.com/wiki/Compute_Module_PoE_4G_Board Compute Module PoE 4G Board - Waveshare Wiki]
* Source revision: 104351
* Captured: 2026-09-01T03:41:16+00:00
* SHA-256: <code>a58b722259cac5e7b8188fdcb6907838b8b412c5222c27a64a69386336813183</code>