Comments on: ESP32 with an Anemometer: Measure Wind Speed (Arduino IDE) https://randomnerdtutorials.com/esp32-anemometer-wind-speed-arduino/ Learn ESP8266, ESP32, Arduino, and Raspberry Pi Mon, 24 Mar 2025 11:45:28 +0000 hourly 1 https://wordpress.org/?v=6.8.2 By: Oussama https://randomnerdtutorials.com/esp32-anemometer-wind-speed-arduino/#comment-1003618 Wed, 29 Jan 2025 13:31:59 +0000 https://randomnerdtutorials.com/?p=163102#comment-1003618 Hi,
According to the documentation of ESP32 the ADC only see the voltage above 100 mV(espressif-docs.readthedocs-hosted.com/projects/arduino-esp32/en/latest/api/adc.html#:~:text=This%20function%20is%20used%20to%20get%20the%20ADC,and%20convert%20it%20to%20calibrated%20result%20in%20millivolts.) . If the sensor output a voltage below 100 mV can be interpreted as 100mv causing erroneous wind speed measurement.
Can you please advice

]]> By: Bernie https://randomnerdtutorials.com/esp32-anemometer-wind-speed-arduino/#comment-992352 Wed, 18 Dec 2024 00:02:39 +0000 https://randomnerdtutorials.com/?p=163102#comment-992352 I wonder if there is an anemometer with digital output instead of analog? Over long distances, analog signals get distorted. And you have to run shielded wire from the anemometer to the board.

For example like the DS18B20 digital thermometer, which by the way has a crazy protocol, but works very well. I have one sensor that is about 20 meters of cabling through the house, where the cable is only 2-wires with no shielding and never had a problem in connecting and identifying the DS18B20. You get far more accuracy and stability with a digital sensor.

]]> By: RD https://randomnerdtutorials.com/esp32-anemometer-wind-speed-arduino/#comment-978999 Thu, 31 Oct 2024 17:37:22 +0000 https://randomnerdtutorials.com/?p=163102#comment-978999 In reply to BikerMark.

Voltage 12V is needed only to supply .
When wind blows output changes from 0V to 5V max.

]]> By: Ed https://randomnerdtutorials.com/esp32-anemometer-wind-speed-arduino/#comment-977737 Wed, 30 Oct 2024 11:00:12 +0000 https://randomnerdtutorials.com/?p=163102#comment-977737 Interesting subject. Obviously the anemometer has some intelligence built in. For anemometers that simply have open and closed contacts, counting pulses would be the way to go

]]> By: BikerMark https://randomnerdtutorials.com/esp32-anemometer-wind-speed-arduino/#comment-977263 Tue, 29 Oct 2024 19:02:44 +0000 https://randomnerdtutorials.com/?p=163102#comment-977263 Hi,
Can you please explain what’s going on inside the anemometer?
How does it convert the 12V input to 5Vmax out? Is there a hall sensor in it?

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