![RAK812 RX TX pin with Arduino Pro Mini 3,3V - #2 by Nicholas - LPWAN Modules / EVBs - RAKwireless Forum RAK812 RX TX pin with Arduino Pro Mini 3,3V - #2 by Nicholas - LPWAN Modules / EVBs - RAKwireless Forum](https://forum.rakwireless.com/uploads/default/original/2X/0/0b30f43c81364f2384bc7742829b43167aea7db1.jpeg)
RAK812 RX TX pin with Arduino Pro Mini 3,3V - #2 by Nicholas - LPWAN Modules / EVBs - RAKwireless Forum
![RAK812 RX TX pin with Arduino Pro Mini 3,3V - #2 by Nicholas - LPWAN Modules / EVBs - RAKwireless Forum RAK812 RX TX pin with Arduino Pro Mini 3,3V - #2 by Nicholas - LPWAN Modules / EVBs - RAKwireless Forum](https://forum.rakwireless.com/uploads/default/original/2X/c/c7be33aa3777918cb019d0d141af4a6b4d0dce8a.jpeg)
RAK812 RX TX pin with Arduino Pro Mini 3,3V - #2 by Nicholas - LPWAN Modules / EVBs - RAKwireless Forum
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how use pin rx tx to on off ( high low ) an relay or led - Installation & Troubleshooting - Arduino Forum
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