The D1 R2 is a mini wifi board based on ESP-8266EX.
11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0)
1 analog input(3.3V max input)
A Micro USB connection
A power jack, 9-24V power input.
Compatible with
Compatible with nodemcu
Getting Started
NodeMcu
Technical specs:
| Microcontroller | ESP-8266EX |
| Operating Voltage | 3.3V |
|---|---|
| Digital I/O Pins | 11 |
| Analog Input Pins | 1 |
| Clock Speed | 80MHz/160MHz |
| FLash | 4M bytes |
| Length | 68.6mm |
| Width | 53.4mm |
| Weight | 25g |
| Pin | Function | ESP-8266 Pin |
|---|---|---|
| TX | TXD | TXD |
| RX | RXD | RXD |
| A0 | Analog input, max 3.3V input | A0 |
| D0 | IO | GPIO16 |
| D1 | IO, SCL | GPIO5 |
| D2 | IO, SDA | GPIO4 |
| D3 | IO,Pull-up | GPIO0 |
| D4 | IO,pull-up, BUILTIN_LED | GPIO2 |
| D5 | IO, SCK | GPIO14 |
| D6 | IO, MISO | GPIO12 |
| D7 | IO, MOSI | GPIO13 |
| D8 | IO,pull-down, SS | GPIO15 |
| G | Gound | GND |
| 5V | 5V | - |
| 3V3 | 3.3V | 3.3V |
| RST | Reset | RST |
*All IO have interrupt/pwm/I2C/one-wire supported(except D0)Programming:
The D1 R2 has a micro USB for auto programming.
Also you can programming it using OTA
Warnings:
All IO is work at 3.3V.
Package included:1 x D1 R2 WiFi ESP8266 Development Board