micropython esp32 ADC
时间: 2023-08-31 18:13:25 浏览: 60
MicroPython is a version of the Python programming language optimized for microcontrollers and embedded systems. It provides a way to run Python code directly on microcontrollers like the ESP32.
The ESP32 is a popular microcontroller module that offers built-in ADC (Analog-to-Digital Converter) functionality. ADC allows you to read analog values from sensors or other external devices.
To use the ADC in MicroPython on the ESP32, you can follow these steps:
1. Import the required modules:
```python
import machine
```
2. Create an ADC object:
```python
adc = machine.ADC(machine.Pin(34))
```
Here, `34` refers to the GPIO pin number on the ESP32 board that is connected to the ADC input.
3. Configure the ADC:
```python
adc.atten(machine.ADC.ATTN_11DB)
adc.width(machine.ADC.WIDTH_12BIT)
```
The `atten` method sets the attenuation level (in dB) for the input voltage range, and `width` sets the resolution of the ADC (number of bits).
4. Read the analog value:
```python
analog_value = adc.read()
```
This reads the analog value from the ADC. The returned value will be in the range of 0 to 4095 (for 12-bit resolution).
You can now use the `analog_value` variable to perform further calculations or use it as needed in your program.
Note: Make sure to refer to the ESP32 board's pinout diagram to determine the correct GPIO pin to use for ADC input.
I hope this helps you get started with reading analog values using MicroPython on the ESP32! Let me know if you have any further questions.