Why shows me ADC output 1.1V
If the fact is the input 0.7V?
Please advise. well thank you.
ESP32 is powered by a 3.7V battery to a USB charger with 5V on a GND and 5V pin.
ADC Connected to SP Pin (GPIO36 ADC0)
- platform: adc
pin: A0
name: “ESP32-BLE-Gateway Voltage”
accuracy_decimals: 3
update_interval: 60s
filters:
- multiply: 1.0
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To your question, that I hopefully understand correctly. You need to set the attenuation for an ESP32. See here:
Hi thanks for the reply. I also tried attenuation set up.
With no result. It still shows 0dB 1.1V or 11dB 3.9V at the output.
According to the multimeter, there is 0.8V at the ADC input.
scheme
Sorry for my bad English. well thank you
Problem solved:
Poorly connected resistor R1K
I changed the resistors
R 4Kohm → R 1000ohm
R 1Kohm → R 220ohm
Everything works.
