WEMOS ESP8266 D1 R2 V2.1

From Geekworm Wiki
Jump to navigation Jump to search

WEMOS ESP8266 D1 R2 V2.1
WEMOS ESP8266 D1 R2 V2.1
WEMOS ESP8266 D1 R2 V2.1


  • 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 nodemcuFeatures


  • Get started in Arduino
  • Get started in NodeMCU
  • Tutorial - Returning a Wemos D1 Mini to Factory Firmware (AT)


  • 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






Add your comment
Geekworm Wiki welcomes all comments. If you do not want to be anonymous, register or log in. It is free.

Anonymous user #1

49 months ago
Score 0++

I have 3 boards. Connected to USB all of them work as expected.

power supply via the 9-24VDC Power jack doesn't work. The circuit U2 generates only a voltage of 3.7V (5V expected) regardless of the input voltage. with this low voltage, the ESP only gets 2.6V

Anonymous user #2

31 months ago
Score 0++
uh...the ESP operates at 3.3 volts. if the onboard regulator is not operating at 3.3 volts, it's fried.

Anonymous user #3

5 months ago
Score 0++
The SDA616 voltage regulator is rated at 3.3V to 16V input - if you've given it 24V then it's toast...


5 months ago
Score 0++
Hello, we are no longer selling this product, but we would like to remind you that 9-24V power input. Please pay attention to the voltage setting, otherwise the board may burn out