Pin | Funcion | Type | Description |
1 | D13 | Digital | SPI SCK, GPIO |
2 | +3V3 | Power Out | Internally generated power output to external devices |
3 | AREF | Analog | Analog Reference; can be used as GPIO |
4 | A0 | Analog | ADC in; can be used as GPIO |
5 | A1 | Analog | ADC in; can be used as GPIO |
6 | A2 | Analog | ADC in; can be used as GPIO |
7 | A3 | Analog | ADC in; can be used as GPIO |
8 | A4/SDA | Analog | ADC in; I2C SDA; Can be used as GPIO |
9 | A5/SCL | Analog | ADC in; I2C SCL; Can be used as GPIO |
10 | A6 | Analog | ADC in; can be used as GPIO |
11 | A7 | Analog | ADC in; can be used as GPIO |
12 | +5V | Power Out | Internally generated power output to external devices |
13 | RST | Digital In | Active low reset input (duplicate of pin 18) |
14 | GND | Power | Power Ground |
15 | VIN | Power In | Vin Power input |
16 | TX | Digital | USART TX; can be used as GPIO |
17 | RX | Digital | USART RX; can be used as GPIO |
18 | RST | Digital | Active low reset input (duplicate of pin 13) |
19 | GND | Power | Power Ground |
20 | D2 | Digital | GPIO |
21 | D3/PWM | Digital | GPIO; can be used as PWM |
22 | D4 | Digital | GPIO |
23 | D5/PWM | Digital | GPIO; can be used as PWM |
24 | D6/PWM | Digital | GPIO; can be used as PWM |
25 | D7 | Digital | GPIO |
26 | D8 | Digital | GPIO |
27 | D9/PWM | Digital | GPIO; can be used as PWM |
28 | D10/PWM | Digital | GPIO; can be used as PWM |
29 | D11/MOSI | Digital | SPI MOSI; can be used as GPIO |
30 | D12/MISO | Digital | SPI MISO; can be used as GPIO |