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What is it? It's a extension board for the Raspberry Pi which provides two additional RS232 ports. The latest version is almost completely compliant to the Raspberry Pi HAT specification. The only ...Read More…
It's a extension board for the Raspberry Pi which provides two additional RS232 ports. The latest version is almost completely compliant to the Raspberry Pi HAT specification. The only missing thing is the slot for the camera flex cable.
I made it because I ran out of serial RS232 interfaces on the Raspberry Pi. You can use it to connect some microcontrollers or Arduino boards. You can also use it as a serial sniffer. A simple program can analyze and forward the serial data to the other port. And you are able to see what's going on on the serial connection between two devices.
The latest version of the Dual Serial Port Extension is working with your Raspberry Pi out of the box! The necessary overlay is provided by the integrated eeprom memory. Just attach the board to your Raspberry Pi and you should get two additional serial devices in Linux (/dev/ttySC0 and /dev/ttySC1).
If you have the very first version without the eeprom, you need to get a copy the overlay from my GitHub repository. Finally, you have to enable the overlay in your config.txt of RPi.
The latest RPi Linux kernel comes already with the necessary SC16IS752 driver.
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I studied at the local University of Technology. 5 years ago, I started my own company. Since then, I'm working as a contractor for the high-tech electronic industry in Austria and Germany. I'm designing electronic hardware devices, make the first prototypes and develop the software for this devices.