In our examples with MicroPython, we usually use the default ESP32 I2C pins (GPIO 21 and GPIO 22). However, the Wemos Lolin32 OLED board uses GPIO 4 and GPIO 5. So, we need to set up that in the script. To define your OLED display I2C pins, pass the SCL and SDA pins as follows: i2c = SoftI2C(scl=Pin(4), sda=Pin(5)) LED light turning ON of on OFF on touch of the finger using ESP32 module - WEMOS D1 R32Related Videos WEMOS D1 R32 (ESP32):LED light voice control via Alex g WeMos LOLIN32. Then the WeMos LOLIN32, I love WeMos as a manufacturer; I think It has a good set of devices and is very versatile with different sizes. The power source at 5v from the specified pin gives a relatively better result, 2.60mA. Still, when powered only with the battery, the board reaches 1.52mA, which is a satisfactory result. Result Wemos D1 je Wifi vývojová deska, založená na ESP8266EX. WeMos D1 obsahuje rozložení pinů skoro identické s Arduino UNO. Všechny I/O piny mají přerušení, PWM, I2C a 1-Wire , mimo pin D0. Deska má USB Micro konektor a USB pro sériový (UART) převodník, takže je jednoduché tuto desku připojit ke svému počítači pomocí USB About the ESP8266 Wemos D1 Mini Board. The ESP8266 is a Wi-Fi module great for IoT and Home Automation projects. The ESP8266 is a Wi-Fi module. It allows you to control inputs and outputs as you would do with an Arduino, but it has Wi-Fi. Wemos D1 mini is like a "little Arduino with wifi" for a great price. First, open the Arduino IDE. Then click Tools > Manage Libraries. Use the search function to locate the GFX library and click install. When locating the SSD1306 library, be sure to choose the Wemos compatible option in order to get the support for the 64×48 pixel display used on the shield. Hi everyone, I managed to use an Wemos D1-mini and its OLED shield to create a mini-display for temperature, with (almost) no line of code. Configuration is done once, and displayed information is entirely sent through MQTT. Here’s a little tutorial: Flash the D1 mini with tasmota-display.bin build Perform the basic Tasmota setup (wifi, MQTT, …) Connect the OLED shield on the D1 mini Set I have a solar inverter that my phone can connect with via bluetooth. But the inverter doesn't have wifi functionality. I am wondering, would it be possible to use a Wemos D1 mini pro to act like a 'brigdge' between my network and the solar inverter? I only wan to read some values and be able to display them in HTML and / or store them on SD. The Ground and the VCC pins of the module needs to be connected to the Ground and the 5 volts pins on the Wemos Mini respectively and the trig and echo pins to any Digital I/O pin on the Wemos Mini, in our example we use D6 for Trig and D7 for Echo. Here is a breadboard layout showing how to connect a wemos mini and HC-SR04. wemos and HC-SR04 Code Learn how to wire the Bluetooth Transceiver to Wemos D1 Mini in a few simple steps. The primary components for this circuit are: Wemos D1 Mini and HC05. Drag and drop these components onto the canvas, and instantly get a list of secondary parts, wiring instructions and a test code for your circuit. Try it for free. yAXWwQj.