Has anyone attempted using an UNO r3 with a relay shield like one linked below instead of a nano and separate relay board? I only need 4 sections with a 2amp load and it seems like it would be a pretty simple plug and play endeavor. Relay current draw should be well within the 500ma provided by USB even if all 4 relays are active at once which would alleviate having to run 12v to the section control box. Please advise if my thoughts are flawed…
Should work. You need to set the correct pins for the relais in the code. According to a Amazon comment is is 7,6,5,4
A possible code would be the section control code for nano.
Just wanted to update this. It works great with the minor alterations to the code.
I have been using it to spray all day. It makes for a neat and compact little package.
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Could you help me with this please, its all new to me, iv got AOG on a tablet so far and the UNO R3 communicating with the tablet. I can find instructions from beginning to end, just bits here and there @BrianTee