Review on 🌈 Dmyond 5PCS WS2812 RGB LED ESP-01/01S Controller Adapter Module for DIY WS2812 Light LED Strip by Kyle Ross

I have many projects where I need an ESP chip to send data over the UART serial port. Normally you would use a real TX line (and you would have RX available too) but this yellow wire is connected to gpio2 and it is not a TX line. but! Instead of using Serial.begin(9600) use Serial1.begin(9600) then use Serial1.println() and all serial sends go over the yellow wire. this is the so-called "half uart", which is the second port on the esp. I have many clock projects that need to get time updates and I do that over the serial port with this board. If you are using esp01s (should be 's') then you have enough firmware to support OTA updates. What I don't like: Only 1 screw hole, but still there. Some boards don't have them at all (scary.)