adds code


I did it! I added button controls to a 4-channel $7 relay board in the AA0Z Contest Dashboard. Special thanks to Connor KD9LSV. Check out these channels below: @AA0Z @Node-RED @HamRadioClubhouse @FlexRadioSystems Keyestudio Relay board for Raspberry Pi: https://www.keyestudio.com/products/keyestudio-rpi-4channel-relay-5v-shield-for-raspberry-pi-ce-certification Link to install the Relay Flow to Node Red: https://flows.nodered.org/node/node-red-contrib-keyestudio-relay-shield-ks0212
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