ESP-12E ESP8266 Development Board WeMos D1 R1

SKU: FA1011 Tag:
Weight 0.003 kg
Dimensions 3.42 × 2.56 cm
Operating Voltage

3.3V
Digital I/O Pins

11
Analog Input Pins

1(3.2V Max)
Clock Speed

80/160MHz
Flash

4M Bytes

WeMOS D1:

The WeMOS d1 which is an Arduino compatible board with the built-in ESP8266 Wifi Module. WeMos D1 Arduino compatible development board is the cheapest WiFi-enabled board available today.  It is a WiFi enabled based on the ESP8266 chip. The board looks like an ordinary Arduino board. The dimensions and the pin layouts are exactly the same. So, this board is compatible with all the existing shields for Arduino. But don’t expect them to work at once, since the libraries available for the ESP8266 chip are few so far. The boards, instead of an ATMEGA chip that standard Arduino boards use, use the impressive ESP8266 WiFi chip. The ESP8266EX chip that the WeMos D1 board uses offers:

  • A 32 bit RISC CPU running at 80MHz
  • 64Kb of instruction RAM and 96Kb of data RAM
  • 4MB flash memory!
  • Wi-Fi
  • 16 GPIO pins
  • I2C,SPI
  • I2S
  • 1 ADC

First of all you are going to notice there is no Atmel chip on the board. The esp8266 is the heart of the board acting not only as the WiFi chip but also as the main processor, other ICs on the board include the CH340 which is our UART USB. ESP8266 D1 R1 IOT board which is an alternative to NodeMCU this is built on ESP12e IC.

It has got a USB socket for power as well as serial communication. A separate power adapter is also there onboard, a 3.3 volt regulator is there so you can use an external adapter up to 12 volt. For our interface it has a micro USB, and then we have our CH340 chip, and having a reset switch. It consists of barrel Jack for DC input and we have got a selection of pin headers TX and RX. For I2C communication it has SDA and SCL pins and have digital pins which are D3, D4, D5, D6, and D7. Then we have another I2C communication pins which are copy of D1 and D2. This board only has the one analog input. We have Vin, ground, 5 volt, 3.3 Volt, and reset. Then we have some extra pin headers for 3.3 volts, RX, TX, and ground.

WeMOS D1Features:

  • 11 digital IO, interrupt/pwm/I2C/one-wire supported(except D0)
  • 1 analog input(3.2V max input)
  • a Micro USB connection
  • Compatible with MicroPython, Arduino, nodemcu

WeMOS D1Technical specs:

Operating Voltage 3.3V
Digital I/O Pins 11
Analog Input Pins 1(3.2V Max)
Clock Speed 80/160MHz
Flash 4M Bytes
Size 34.2*25.6mm
Weight 3g

 

WeMOS D1Pin Description:

Pin Function ESP-8266 Pin
TX TXD TXD
RX RXD RXD
A0 Analog input, max 3.2V 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

Interfacing relay with Wemos D1:

We are going to control basically anything in your house from the internet and really I mean that’s why you bought an esp8266 so that you can turn things on and off from a different place. Now we are going to turn on and off a relay. The relay that we are using can control up to 10 amps 250 volts AC or 10 amps 125 volt AC and 10 amps 30 volt DC.  It’s got three contacts in the center is your common on the right is your normally closed and on the left is your normally open. So when you activate the relay your normally closed contacts opens and you are normally open contacts closes. So if you want something that’s lonely off that you want to be able to turn it on you plug it into the open and the common. Now at the other end of the relay it has only three pins signal positive and negative. We will connect the signal pin of the relay module with the pin d4 on our esp8266 board and connect the VCC and ground of the relay with the 5 volts and ground of the WeMOS board. You could plug a light, motor, fan, heater, air conditioner whatever you want and control it over the Internet with the relay.

WeMOS D1

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