CP210xRelay

This project contain windows command line software and cad drawings for a relay box based on a CP210x USB chip. Originally used for test automation.

Part list

Software

This tool is for windows. Linux has a kernel driver for the chip so there are some options.

Build

Build using CMake or open with Visual Studio 2019 which support CMake out of the box.

Preparation

For windows to recognice a CP210x delivered from the factory you need to either:

Install a windows driver
Or to reprogram the board's PID to utilize the driver distributed with windows. (see below)

Reprogramming procedure

To make the box plug-and-play with Windows without driver installation, use CP210xSetIDs.exe from legacy utilitities to reprogram the chip´s VID to 0x10C4 and PID to 0xEA63. This will make Windows find and install the correct driver automatically. Note that the windows driver is needed to run the reprogramming tool.

How to run

Examples:

Turn on first relay: CP210xRelay.exe 0 1
Turn off first relay: CP210xRelay.exe 0 0
Turn on second relay: CP210xRelay.exe 1 1
Select one of many connected boxes: CP210xRelay.exe --port COM4 0 1

Help:

$  ./CP210xRelay.exe --help
Usage: CP210xRelay.exe [OPTION]... RELAY_NUMBER NEW_STATE
Control the state of a CP210x GPIO based relay board.

RELAY_NUMBER  Which relay to control. (0 to 3)
NEW_STATE     1 turns on the relay, 0 turns it off.

All COM ports are probed by default to find the relay board. If
exactly one relay board is found, it is used without the need to
specify it explicitly.

 -p, --port   COM port for the relay board to control
              Example: "COM4"
 --test       Cycle all relays on and off

Box

The relay card enclosure can be 3D-printed using the pre-exported amf box file and lid file or opened and modified using FreeCAD.

Assembly

Put relay card into enclosure. Put some force where the mounting holes are and press it down and it will stay in place. The lid will snap into place.

SICKAG/CP210xRelay