KiCad PCB based on the CP2102N USB-UART serial converter. This implements the "auto reset" circuits of most ESP32 dev boards. You can run things like esp-idf's make flash or flash code from the Arduino IDE without having to hold down any buttons.
Connect EN, RX, TX, IO0, and GND to their respective pins on the ESP32 (don't forget to swap the RX and TX pins!) and make sure you have the Silicon Labs CP210x driver installed on your OS.
You can order this PCB on OshPark
(All resistors and capacitors are size 1608 metric)
| Label | Description |
|---|---|
| U1 | CP2102N |
| R1 | 1 kOhm |
| R2 | 10 kOhm |
| R3 | 22.1 kOhm |
| R4 | 10 kOhm |
| R5 | 47.5 kOhm |
| C1 | 4.7 uF |
| C2 | 0.1 uF |
| C3 | 4.7 uF |
| C4 | 0.1 uF |
| Q1 | MMBT2222L transistor (SOT-23 package) |
| Q2 | MMBT2222L transistor (SOT-23 package) |
