Step 1. Check hardware wires
The Cactus Micro Rev2 has connected esp8266 module as the bottom table. You don't need make any change.
| ESP8266 | Cactus Micro Rev2 |
| GPIO0 | 12 |
| ENABLE | 13 |
| RX | TXO (Serial1) |
| TX | RXI (Serial1) |
| GND | GND |
Step 2. Program the programmer sketch
We wrote a sketch esp8266Programmer. For upgrade firmware for esp8266 module, you should open Arduino IDE and upload the sketch.
Step 3. Download tools and upload firmware to esp8266
- For Linux/OSX, download the modified version esptool, we changed the flash block to smaller size.
- For Windows, download the NodeMCU Flasher (Options: 1M bytes/QIO)
If upload failed, please press the reset button on Cactus Micro Rev2 and try again.