![]() There is nothing being output from the serial monitor. ![]() When I go to reload the program into the relay node, the red onboard led is flashing every second as if it is running the 'blink' code. If I initiate a valve opening within sight of the gateway (indoors) I can tell the relay node is not working as there is no initial handshake visible on the gateway leds. They are mains powered and turned on at the same time as the water butt pump. The nano and relays are mounted outside in a waterproof box. However once every few weeks, the nano loses its program code. ![]() This has been working the vast majority of the time for 2 years. ![]() I have an irrigation system with an arduino nano (clone) driving 4 relays that control the irrigation valves.
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