The D1 R2 WiFi Development Board Discover the D1 R2, a compact and versatile mini WiFi board powered by the ESP-8266EX chip. Perfect for your electronics and IoT projects. Key Features: Versatile Digital I/O: 11 digital input/output pins with full support for interrupt, PWM, I2C, and one-wire (except D0). Analog Input: 1 analog input pin with a maximum input of 3.3V. Connectivity: Comes with a Micro USB connection for easy interfacing. Power Options: Features a power jack supporting 9-24V input. Compatibility: Works seamlessly with NodeMCU for robust project development. Technical Specifications: Microcontroller: ESP-8266EX Operating Voltage: 3.3V Digital I/O Pins: 11 Analog Input Pins: 1 Clock Speed: 80MHz/160MHz Flash Memory: 4M bytes Dimensions: 68.6mm x 53.4mm Weight: 25g Pin Mapping: Pin Function ESP-8266 Pin TX TXD TXD RX RXD RXD A0 Analog input, max 3.3V 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 Ground GND 5V 5V - 3V3 3.3V 3.3V RST Reset RST Note: All IO pins support interrupt, PWM, I2C, and one-wire, except for D0. Programming: Easily program the D1 R2 using its Micro USB for automatic programming or opt for wireless programming using OTA (Over The Air). Warnings: All IO operations run at 3.3V. Ensure compatibility with your components. Package Includes: 1 x D1 R2 WiFi ESP8266 Development Board
