How to configure an Arduino Uno to program an esp8266-01
| Arduino Uno | esp8266 |
|---|---|
| 3.3v | VCC, CH_PD |
| GND | GND, GPIO_0 |
| TX | TXD |
| RX | RXD |
And Arduino Uno GND to RESET as seen above. Install the esp8266 boards from inside the Arduino IDE, select "Generic ESP8266 Module" and upload your code! Yes, TX > TXD and RX > RXD is correct - blame the manufactuer I guess ¯\_(ツ)_/¯