Important!
Please note that this board 3.3V, and can NOT be used with 5V logic modules without a voltage level converter!
Overview
WEMOS D1 is a WIFI development board based on ESP8266. The functioning is similar to that of NODEMCU , except that the hardware is built resembling Arduino UNO. It has a larger flash memory compared to an Arduino Uno. It consists of 11 digital I/O pins and 1 analogue (input) pin.
| Microcontroller | ESP-8266EX |
| Operating Voltage | 3.3V |
| Digital I/O Pins | 11 |
| Analog Input Pins | 1 |
| Clock Speed | 80MHz/160MHz |
| Flash | 4M bytes |
Pinouts
Important! all the I/O pins runs at 3.3V only. Do not plug anything over 3.3V on all I/O pins. It will damage the boards in a second.
Installation
Windows Drive Manager
Use a MicroUSB cable to connect D1 with Windows PC. Make sure that the cable is capable of handling both Data & power (some of the mobile cables can handle only power & not data) .Open the DEVICE MANAGER & note the COM PORT allotted to the module.As the serial chip used on D1 is CH340 , you need to install the corresponding drivers.
Arduino IDE
- Installing the latest Arduino IDE from Arduino website.
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Go to File > Preferences on Arduino IDE, enter
https://arduino.esp8266.com/stable/package_esp8266com_index.jsoninto the Additional Board Manager URLs field.
- Open Boards Manager from Tools > Board > Boards Manager menu , search and install esp8266 platform.
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From Tools > Board, Select the board as WEMOS D1 R1, and choose the correct Com port.
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Now, Let's light up the build in LED. open the File > Examples > 01. Basics > Blink sketch and click UPLOAD button. The build in LED nears the Wifi chips should blink accordingly.
Reference