![]() ThingSpeak is an open-source software written in Ruby which allows users to communicate with internet enabled devices. A Chinese expert in Electronic Manufacturing Service (EMS).Factory PCBs with most competitive advantages.A 24/7 non-stop production and assistance service.Great quality approved by customers all over the world.Why Buy Printed Circuit Board From NextPCB? They offer very good quality PCB at reasonable price. NextPCB is one of the most experienced PCB manufacturers in world. Simply Visit NextPCB and upload gerber file and order the PCB. You can download the gerber file and order the PCB online from NextPCB.ĭownload Gerber File: IoT Water Flow Meter The gerber file for the PCB is given below. Below is the front view and Back View of the PCB. The PCB for this project has been designed in EasyEDA online PCB making tool. PCB Designing & Ordering Online With NextPCB You can use the custom-designed PCB for making the small Water Flow Meter board. I 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. 1/2″ nominal pipe connections, 0.78″ outer diameter, 1/2″ of threadĬheck the YF-S201 Hall Effect Water Flow Meter / Sensor Datasheet IoT Water Flow Meter using NodeMCU ESP8266.Flow rate pulse characteristics: Frequency (Hz) = 7.5 * Flow rate (L/min).Working Flow Rate: 1 to 30 Liters/Minute.Working Voltage: 5 to 18V DC (min tested working voltage 4.5V).Pulse frequency (Hz) / 7.5 = flow rate in L/min. The pulse signal is a simple square wave so its quite easy to log and convert into liters per minute using the following formula. However, its great for basic measurement tasks! It will need careful calibration if better than 10% precision is required. Note this isn’t a precision sensor, and the pulse rate does vary a bit depending on the flow rate, fluid pressure and sensor orientation. ![]() Each pulse is approximately 2.25 milliliters. By counting the pulses from the output of the sensor, you can easily calculate water flow. The sensor comes with three wires: red (5-24VDC power), black (ground) and yellow (Hall effect pulse output). ![]() The hall effect sensor is sealed from the water pipe and allows the sensor to stay safe and dry. There’s an integrated magnetic hall effect sensor that outputs an electrical pulse with every revolution. This sensor sits in line with your water line and contains a pinwheel sensor to measure how much liquid has moved through it. In the above image you can see the sensor.
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