WeMos D1 Mini. The WeMos D1 Mini with integrated ESP8266 has an operating voltage of 3.3V and 4MB flash memory. Its size 34.2mmx25.6mm is between the NodeMCU and ESP-01 module by Ai-Thinker. There are different versions of the WeMos D1 Mini board. Version.
Simple wemos D1 mini MQTT example: This sketch demonstrates the capabilities of the pubsub library in combination: with the ESP8266 board/library. It connects to the provided access point using dhcp, using ssid and pswd: It connects to an MQTT server ( using mqtt_server ) then: - publishes "connected"+uniqueID to the [root topic] ( using topic )
LOLIN I2C Port; Compatible with Arduino, MicroPython, NodeMCU Get started with Arduino [D1/D1 mini series] wemos.cc Revision 14220f49.
Somewhere you need to specify the size and. lcd.begin(4,5); does not make sense. I create the lcd object as: LiquidCrystal_I2C lcd(0x27,20,4); // Set the I2C address and display size.
SCL -> D1 SDA -> D2. So the SCL and SDA wires are both connected to the VCC line with a 10kOhm resistor. Note that I use a non-arduino board, so the pinouts are a little different, but the D1 and D2 pins should be the correct pins according to the Wemos D1 R2 pinout: In my wiring I used the bottom right D1 and D2.

D1 Mini Shields » AT8870 Motor Shield AT8870 Motor Shield¶ I2C dual motor driver shield based on at8870. Features¶ I2C interface; Power supply voltage: VM=6.5

SwgAn.
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    • wemos d1 mini i2c example