Original Supplier information
- The Development Kit based on ESP8266, integrates GPIO, PWM, IIC, 1-Wire and ADC all in one board.
- Power your development in the fastest way combining with NodeMCU Firmware!
- USB-TTL converter included, plug & play.
- 10 GPIO, every GPIO can be PWM, I2C, 1-wire.
- FCC CERTIFIED WI-FI module.
- PCB antenna.
Board with display
There is also a NodeMCU with an integrated display.
Beware: The D5 and D6 as shown in the display are incorrect!
The board uses I²C to connect to the 0.96" OLED display via the SCL (D6/GPIO12) and SDA (D5/GPIO14) pins. The SSD-1306 display has a resolution 128x64.
0.96" SD1306 OLED Parameters:
- OLED self-luminous, no backlight
- Screen material: glass, need good protection
- Size: 0.96 inch
- Colour: yellow blue (2 text lines yellow, 6 text lines blue)
- Voltage: 3.3V-5V DC
- Viewing angle: >160°
- High resolution: 128x64
- Driver lC:SSD1306
This upside-down figure has been corrected by me (OLED SCL, OLED SDA)
Advised library for Arduino: U8g2
Use with Tasmota
For testing, I connected a SI7021 temperature sensor to the same I²C bus as the display.
Load a Tasmota custom firmware with USE_DISPLAY_SSD1306 and USE_HTU (you have to build this yourself!).
Set the template to:
{"NAME":"NodeMCU-SSD1306","GPIO":[1,1,1,1,1,1,1,1,608,1,640,1,1,1],"FLAG":0,"BASE":18}
Enter the following commands in the console:
- i2cdriver4 1 <-- SSD1306 display USE_DISPLAY_SSD1306
- i2cdriver9 1 <-- SI7021 temp hum USE_HTU
- displaymodel 2 <-- SSD1306 display
- displaymode 4 <-- MQTT, local sensors
- displayrows 8 <-- default 2 rows, change to 8
The display now shows the measured temperature and humidity.
Showing the sensor values on the screen with Tasmota
The web-interface of the Tasmota NodeMCU-OLED with Si7021
The big "ON" represents the display: it can be toggled off/on.