Wemos D1 R2 V2.1 - nodeMCU meets Uno meets ESP8266 WiFi - Arduino IDE
New Version!! WeMOS D1 R2 V2.1 WiFi Board
$15.95
QTY: 6
In Stock
This is Arduino Form factor compatible (The pin mapping is different here when compared to the old D1 product)
You can program this device via the regular Arduino IDE.. Very interesting piece of kit for anyone interesting in
prototyping with Arduino form factor shields while leveraging off the capability of the Wemos ESP8266 Wifi Chip.
You can also treat this board like a nodeMCU and then run Arduino Shields on it. All in all extremely clever and great value for money.
If you are a Maker, an experimenter, a prototyper, I'd highly recommend one.
What's new V2.1.0
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Use BRT (Bias Resistor Transistor), easier entry into flash mode.
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Optimize the circuit, the system is more stable.
About D1 R2 V2.1.0
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based on the ESP-8266EX.
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Arduino Compatible, you can use it on Arduino IDE.
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NodeMcu Compatible
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11 Digital I/O pins
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1 Analog Input pin
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OTA -- Wireless Upload(Program)
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On board switching power supply -- Max 24V input, 5V 1A output
The D1 R2 is a mini wifi board based on the ESP-8266EX.
- 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except for D0)
- 1 analog input(3.2V max input)
- Micro USB connection
- Power jack, 9-24V power input.
- Compatible with Arduino
- Compatible with nodemcu
Getting Started
Arduino
NodeMcu
Technical specs
| Microcontroller | ESP-8266EX |
| Operating Voltage | 3.3V |
| Digital I/O Pins | 11 |
| Analog Input Pins | 1(Max input: 3.2V) |
| Clock Speed | 80MHz/160MHz |
| Flash | 4M bytes |
| Length | 68.6mm |
| Width | 53.4mm |
| Weight | 25g |
Documentation
Board size
Schematics
Pin
| 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, 10k Pull-up | GPIO0 |
| D4 | IO, 10k Pull-up, BUILTIN_LED | GPIO2 |
| D5 | IO, SCK | GPIO14 |
| D6 | IO, MISO | GPIO12 |
| D7 | IO, MOSI | GPIO13 |
| D8 | IO, 10k Pull-down, SS | GPIO15 |
| G | Ground | GND |
| 5V | 5V | - |
| 3V3 | 3.3V | 3.3V |
| RST | Reset | RST |
All of the IO pins have interrupt/pwm/I2C/one-wire support except D0
Programming
The D1 R2 has a micro USB for auto programming.
You can also program it using OTA.
Warnings
All of the IO pins run at 3.3V.
(IF_598C9A3AB)
| SKU | IF_598C9A3AB |
| Brand | Logicware |
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