This self-test cable works with the Sequent Home Automation 8-layer stackable HAT, allowing you to test groups of three inputs and outputs on the HAT. Features * Three-connector cable for self-testing the Sequent Home Automation HAT * Self-test groups of 3 inputs and outputs * Command-line software for each test How to Use Test the GPIO and Opto-Inputs 1-4: Insert the cable on the left side of the card, as shown in the picture below, and run the self-test command Test the analog inputs and outputs: Insert the cable on the bottom side of the card, as shown in the following picture, and run the self-test command. Test the open-drain outputs and opto-inputs 5-8: Insert the cable on the right side of the card, as shown in the following picture, and run the self-test command. Testing the relays Without the loopback cable, run the command relaytest. Relays will cycle on and off in sequence and the corresponding LED's will turn on and off. https://elecena.pl/product/22725778/self-test-cable-for-home-automation-hat 2023-03-07 https://elecena.pl/product/22725778/self-test-cable-for-home-automation-hat 2023-12-27 https://elecena.pl/product/22725778/self-test-cable-for-home-automation-hat 2024-04-02 https://elecena.pl/product/22725778/self-test-cable-for-home-automation-hat 2024-09-19 https://elecena.pl/product/22725778/self-test-cable-for-home-automation-hat 2024-11-29 https://elecena.pl/product/22725778/self-test-cable-for-home-automation-hat 2024-11-30 https://elecena.pl/product/22725778/self-test-cable-for-home-automation-hat 2025-11-28 https://elecena.pl/product/22725778/self-test-cable-for-home-automation-hat 2025-11-29