To make webserver page interactive with ESP8266 module we need to used http post request. browser sends a POST request to /LED. When the ESP receives such a POST request on the / PIN number URI, it will turn on or off the LED, and then redirect the browser back to the home page. To send the POST request in the web browser is made of an HTML form. Mini MP3 Player Module. $6.69 AUD. The WeMos D1 R2 Uno based ESP8266 a wireless 802.11 (Wifi) microcontroller development board compatible with the Arduino IDE. It turns the very popular ESP8266 wireless (WiFi) module into a fully fledged development board. The layout of this board is based on a standard Arduino hardware design with similar Summary. The DHT11 sensor is a useful and cheap temperature and humidity sensor that can be used with the WeMos D1 mini. Although the standard DHT11 libraries cannot be used there are similar libraries designed for ESP8266 chipsets such as the WeMos D1 mini. For a full review of the DHT11 have a read of my previous post. pinout of a Wemos D1 mini. Using Arduino Programming Questions. stevennoppe November 11, 2017, 11:07am 1. I'm getting frustrated here. I'm trying to read out a DHT22 sensor. It's a breakout board with 3 pins : GND, VCC and DAT. I connected the 5V of the Wemos D1 mini with the VCC, the GND with the GND and the DAT with D0. So yes, I would be very appreciative of your resources, especially any helping with I2C, as Adafruit's example code only goes so far. Pretty much in the end, I want to expose all 4 keys (more in the future with different I2C addresses, but starting small for now) and the neopixels to HA. Here are some of the products I used. Smart Electronics D1 mini – Mini NodeMcu 4M bytes Lua WIFI Internet of Things development board based ESP8266 by WeMos. 0.66″ inch For Wemos Oled 64X48 IIC I2C LCD OLED LED Dispaly Shield for Arduino Compatible For WeMos D1 Mini SSD1306 OLED Shield. by hotcoin.net. WeChat Reddit LinkedIn Share. Step 1. Plug the D1 Mini into your Mac. The first thing that you need to do is plug the D1 Mini board into your Mac. The board will be powered by the USB cable for this example. So you won't need an external power supply. Plug the USB cable into your laptop. Plug the USB cable into your D1 Mini board. Step 2. Wemos D1 mini is an ESP8266 board that’s interesting thanks to its size, its low price ($4), micro USB power, its shields, and a documentation that looks fairly good. The board can be programmed with Arduino or Lua, and supports both serial and OTA programming. Here I explain the difference in pin numbering for the WeMos D1 Mini compared to an Arduino and include a sample blink sketch. Instead of supplying photos of your layout, draw a diagram which showing all the interconnections and labeling the pins and post that. Summary. The DHT22 sensor is a really nice sensor to measure temperature and humidity that can be used with the WeMos D1 mini. Although there is some complication as the standard DHT22 library cannot be used there is a library designed for the ESP8266 chipset such as the WeMos D1 mini. For a full review of the DHT22 have a read of my previous post. cRD2Vz.