The most important thing is, that I can use it with a battery ( I already built a wired lux sensor with a sonoff basic). I found a few guides how to connect a BH1750 to a wemos d1 mini or other stuff, but nothing decent for battery usage. It looks like the main problem is that a demos d1 mini drains the battery to fast (also with deep sleep). This D1 mini module is a mini WIFI board based on ESP-8266MOD. This board contains 11 digital I/O pins, all pins have interrupt / PWM / I2C with a micro-USB connection for power and data connectivity. This also has one analog pin for analog inputs. WeMos D1 Mini board is 100% compatible with Arduino IDE. As I wrote in title, I have Arduino Uno and Wemos (0.66” Across) OLED Shield which i bought along wemos d1 mini. For some reason I want to use it with uno. but there are just 0.96 tutorials internet and I don't know which pins to connect. I would appreciate any help. PINS UNDER blue stick are . TX RX D1 D2 D3 so on.. daniellewis March 10, 2023, 2:42am 9. I have tried EXACTLY this setup but still get "no PN532 found". PN532 -> D1 mini. GND -> GND. VCC -> 5V. SDA -> D2. SCL -> D1. on the PN532 module I have it set to I2C mode (L R - so 1 is set to low and 2 is set to high) vvilho March 10, 2023, 3:07am 10. 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. .

wemos d1 mini i2c example