ESP32 ADC – Read Analog Values with Arduino IDE

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This video shows how to read analog inputs with the ESP32 using Arduino IDE. Analog reading is useful to read values from variable resistors like potentiometers, or analog sensors.

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  1. Rui Santos
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Комментарии
Автор

Thanks Man. Life would have been so difficult without you !!

samarthagarwal
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Rui Great Work this really help me out. :)

ebcradioshow
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Great explanation. Using an interrupt instead of delay(1000) would be nice for integration with other functionality. Have you done a video on interrupts with the esp32? Thanks for sharing your expertise.

quaternion-pi
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Boas! Muita bom Rui! Olha... onde é que compras os teus ESP32 ?

dpintassilgo
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So with both power and ground connected, is it doing pull-up and pull-down on this simultaneously, or is that only for digital switches?

marks
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Great tutorial. Can help me with some project? I use ESP32 Devkit V1 and i connected digital led WS2812B, 4 channels relay module, DS18B20 sensor, and capacitive soil moisture sensor.I supplied all of them with Vin. The capacitive soil moisture sensor shows different value when i turn on digtal led or relay module, what's maybe i wrong with connection or i need to write code for adc. Capacitive soil moisture sensor connect on GPIO34, digital led is in GPIO23, DS18B20 sensor in GPIO4 and for relay module i use GPIO 2, 26, 27, 33.

slaviormanliev
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hiii can't found port option in Arduino it is grey have to do to enable the port option for selecting the corresponding port.

sivakumarc
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esp32 & st7781 tft lcd display pin connection help
What is LCD_RST, LCD_CS, LCD_RS, LCD_WR, LCD_RD esp32 pin equivalent

hayalci_
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now for a scaled 0 to 10 vdc input signal with zero and span adjustments then oled display output value with tenths resolution 00.0... thanks a lot...:)

qzorn
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How much ohm should the potentiometer can have?
Sorry for bad english

MrBMWerner
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Hello sir, I am also using potentiometer but adc value fluctuate a lot also noise glitches visible .. plz guide me what I can use it will be really helpful thankyou

happysingh-gkdj
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How many analog inputs can ESP32 handle?

rizvian
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Thank you for the fast tutorial, please help me in getting the real linear value on any of ESP32 ADC channels,
lets say we want to make a simple voltMeter using ESP32:


Actually when volt is 0 ADC value is 0,
when volts 3.3 ADC value it 4096
but any values in between is NOT related to to the linear equation:
3.3v ----> 4096
???v ----> ADC value


so: voltage =ADC*3.3/4096, is a wrong way to measure voltage using ESP32
from my side i tried but i got wrong results.


could you make a video that explains this issue ? then provide a solution if possible !

maysaraabdula
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does not work for esp32 s3R8 lilygo t-display

leemarc
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But this is not accurately reading.
How to resolve this ?

akash
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have try the code, the value readed is not the value it should be. when convert 4095 to voltage should be 3.3V but says its 3V

jorgeneiva
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My kingdom for a video discussing measuring frequencies off an analog input. Ugh. The search continues.

rawyin