As you might have seen, I’ve made a few projects with PL2303HX, namely that little nifty esp8266 developer board. I plan to dive in esp8266 firmware development soon and my goal will be a nifty mysql client, so that I can run mysql queries via UART! The only bad thing (apart from eeprom never working, and occasional freezes that I’ve later fixed with a 10uF SMD capacitor) – I had to press the buttons to reset the ESP8266 module to bootloader mode. So I’ve made a ‘dark green evil sister’ twin of that red board with a little bit updated schematics:
- GP0 and GP1 lines are now rigged to reset and bootloader buttons respectively, resistors protect those against logic level conflict.
- I’ve ditched EEPROM. It doesn’t work anyway. Screw that!
- Proper decoupling – no more freezes!
- SMD LEDs on GP0 and GP1.
- Nice dark greenish design and clear urethane coating FTW!