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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 ==
The 2-Channel Isolated RS232 Expansion HAT connects two isolated RS232 devices to a Raspberry Pi via SPI. It uses SC16IS752 and SP3232, includes TVS protection, and is suitable for industrial automation.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL17498 WSAL17498 – 2-Channel Isolated RS232 Expansion HAT for Raspberry Pi]

== Technical overview ==
* Uses the standard Raspberry Pi 40-pin GPIO header and fits common Raspberry Pi boards.
* Uses the SC16IS752 (SPI-to-UART) and SP3232 (RS232 transceiver) chip combination.
* Transfers data at rates from 300 to 921600 bps over an SPI interface.
* Provides power isolation, ADI magnetic coupler, and TVS diodes for surge protection.
* Indicates operating state via onboard LEDs for power and transmit/receive status.
* Breaks out the SPI control pins (VCC, GND, SCLK, MOSI, MISO, CS, IRQ) as headers for external control boards.

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
sudo nano /boot/config.txt
dtoverlay=sc16is752-spi1,int_pin=24
sudo reboot
ls /dev
sudo apt-get install wiringpi
sudo apt-get update
sudo apt-get install python-pip
sudo pip install RPi.GPIO
sudo apt-get install python-serial
sudo apt-get install p7zip-full
wget https://files.waveshare.com/upload/3/35/2-CH_RS232_HAT_Code.7z
7z x 2-CH_RS232_HAT_Code.7z -o./2-CH_RS232_HAT
sudo chmod 777 -R 2-CH_RS232_HAT
cd 2-CH_RS232_HAT/2-CH_RS232_HAT_Code/
sudo git clone https://github.com/waveshare/2-CH-RS232-HAT
cd 2-CH-RS232-HAT/
cd c
make clean
make
sudo ./main
</syntaxhighlight>

== Notes and version constraints ==
* The exact path structure of example code may vary by OS version; local verification required.
* Modifying config.txt requires a reboot; on Ubuntu the file is located under /boot/firmware instead of /boot.
* Simultaneous use with the 2-Channel RS485 HAT is not supported according to the source.
* Stacking multiple 2-Channel RS232 HATs on a single Raspberry Pi is not supported; a maximum of four channels is possible.
* For communication issues, check flow control, wiring, parity, and baud rate settings.

== Source and revision record ==
* [https://www.waveshare.com/wiki/2-CH_RS232_HAT 2-CH RS232 HAT - Waveshare Wiki]
* Source revision: 90571
* Captured: 2026-08-31T04:21:23+00:00
* SHA-256: <code>a9668979939455478bf62dfcb5e6164e3d14e6a60cc95869661809a10fa8ffa1</code>

WSAL17498 – 2-CH RS232 HAT/en - Versionsgeschichte

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