ATSAMD21 Cortex-M0+ board with U-BLOX NINA-W10 ESP32 Wi-Fi/BLE module and ECC508 crypto chip for secure IoT prototyping. LiPo charging built in; 3.3 V logic. Successor to the MKR 1000 — replaces the Atmel WINC1500 with the ESP32-based NINA module.
| Pin | Position | Type |
|---|---|---|
| VIN | VIN | Power |
| 5V | 5V | Power |
| 3V3 | 3V3 | Power |
| GND | GND | Ground |
| A0 | A0 | Analog |
| A1 | A1 | Analog |
| A2 | A2 | Analog |
| A3 | A3 | Analog |
| A4 | A4 | Analog |
| A5 | A5 | Analog |
| A6 | A6 | Analog |
| D0 | D0 | GPIO |
| D1 | D1 | GPIO |
| D2 | D2 | GPIO |
| D3 | D3 | GPIO |
| D4 | D4 | GPIO |
| D5 | D5 | GPIO |
| D6 | D6 | GPIO |
| D7 | D7 | GPIO |
| D8 | D8 | GPIO |
| D9 | D9 | GPIO |
| D10 | D10 | GPIO |
| D11 | D11 | GPIO |
| D12 | D12 | GPIO |
| D13 | D13 | GPIO |
| D14 | D14 | GPIO |
| SDA | SDA | I2C |
| SCL | SCL | I2C |
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