A development board for the ESP12 and ESP12E WiFi modules. Featuring some useful sensors and required peripherals to make it work.
Initial board version with 3.3V LDO and 5V LDO.
- TXB0106 symbol is wrong resulting in a short circuit
- 3V3 LDO will get hot when board is powered with 12V
- Replaced the 3.3V LDO with a TPS562209 based switching power supply to reduce power dissipation.
- Added more capacitors to increase stability
- 3V3 level FTDI-compatible UART pin header
- push buttons for reset and boot
- 7 - 12VDC power input
- 5V power input possible when bypassing internal 5V LDO with 0 Ohm resistor or ferrite bead.
- 6 bidirectional 5V I/O pins
- Microphone
- Temperature and humidity sensor
| Component | Description | Notes | IO pin |
|---|---|---|---|
| TXB0106 | 6 bit level translator | Interfacing with 5V I/O | 4,9,10,12,13,14 |
| DS18B20 | 1-Wire temperature sensor | Shares pin with DHT11 | 5 |
| DHT11 | Temperature and humidity sensor | Shares pin with DS18B20 | 5 |
| LED | General purpose LED | 16 | |
| EKMC1601113 | Digital motion detection | Shares I/O pin with TXB0106 | 4 |
| MIC | Electret Microphone with amplifier circuit | ADC has max input of 1V | ADC |