3/10/2024 0 Comments Arduino flow meterI have assembled the circuit on Breadboard. The OLED Display works at 3.3V so it can be connected to 3.3V pin of Nodemcu. ![]() Similarly, I2C OLED Display SDA & SCL pins are connected to D2 & D1 of ESP8266 respectively. The sensor works at 5V & can be connected to Vin of ESP8266. In my case, I connected to GPIO2, i.e D4. Water Flow Sensor is a digital Sensor, so we can connect its output pin to any of the digital pins of ESP8266. You can switch to Blynk App if you want immediate data or MQTT Protocol.įollow circuit connections are as follows: Measured data can be sent to Thingspeak Server after an interval of 15 seconds regularly. In OLED display we can see Water Flow Rate & Total Volume of Water passed through the pipe. ![]() Now We will interface YF-S201 Hall-Effect Water Flow Sensor with Nodemcu ESP8266 & OLED Display.
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