xreef/PCF8591_micropython_library 开源项目中文解读：技术栈、适用场景与上手建议

项目介绍

xreef/PCF8591_micropython_library 是一个托管在 GitHub 上的开源项目，主要使用 Python 编写，采用 Other 许可证，目前获得 2 个 Star、1 次 Fork。

仓库全名: xreef/PCF8591_micropython_library

README 摘要

www.mischianti.org MicroPython Library to use i2c analog IC with arduino and esp8266. Can read analog value and write analog value with only 2 wire (perfect for ESP-01). Changelog 07/11/2023: v0.0.3 Fix on read when write is active and running #Forum 16/05/2023: v0.0.2 Minor fix on read and write #Forum 18/04/2023: v0.0.1 Initial commit of stable version. I try to simplify the use of this IC, with a minimal set of…

完整内容见 GitHub 原始 README 或本页。

常见问题

PCF8591_micropython_library 用什么语言开发？

主要使用 Python 编写，采用 Other 许可证，目前有 2 个 Star。

PCF8591_micropython_library 可以免费商用吗？

仓库标注的许可证为 Other，商用前请先阅读仓库 LICENSE 文件确认授权范围。

如何获取 PCF8591_micropython_library 的源码？

可以直接克隆仓库：git clone https://github.com/xreef/PCF8591_micropython_library.git；安装与运行步骤见仓库 README。

PCF8591_micropython_library 最近还在维护吗？

仓库最近一次更新为 2025年5月22日，当前没有未关闭的 Issue；Star 数为 2，可作为社区活跃度的参考。

关于

MicroPython Library to use pcf8591 i2c analog IC with Arduino, Raspberry Pi Pico and rp2040 boards, esp32, SMT32 and ESP8266. Can read analog value and write analog value with only 2 wire.

analog arduino esp32 esp8266 expander i2c micropython pcf8591 raspberry rp2040 samd stm32 wire

Other
2 Stars
1 Forks
2 Watching

描述取自 GitHub 官方 API，中文内容由 GitRead 中文社区编辑团队整理。

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GitHub

www.mischianti.org

MicroPython Library to use i2c analog IC with arduino and esp8266. Can read analog value and write analog value with only 2 wire (perfect for ESP-01).

Changelog

07/11/2023: v0.0.3 Fix on read when write is active and running #Forum
16/05/2023: v0.0.2 Minor fix on read and write #Forum
18/04/2023: v0.0.1 Initial commit of stable version.

I try to simplify the use of this IC, with a minimal set of operation.

Installation

To install the library execute the following command:

pip install pcf8591-library

Constructor: Pass the address of I2C

from PCF8591 import PCF8591
from machine import I2C, Pin
    
# Initialize the I2C bus
i2c = I2C(0, scl=Pin(22), sda=Pin(21))  

# Initialize the PCF8591
pcf8591 = PCF8591(0x48, i2c)
if pcf8591.begin():
    print("PCF8591 found")

from PCF8591 import PCF8591

pcf8591 = PCF8591(0x48, sda=21, scl=22)
if pcf8591.begin():
    print("PCF8591 found")

To read all analog input in one

# Main loop
while True:
    # Read all analog input channels
    ain0, ain1, ain2, ain3 = pcf8591.analog_read_all()

    # Print the results
    print("AIN0:", ain0, "AIN1:", ain1, "AIN2:", ain2, "AIN3:", ain3)

    # Wait for 1 second
    utime.sleep(1)

If you want to read a single input:

print("AIN0 ", pcf8591.analog_read(PCF8591.AIN0))
print("AIN1 ", pcf8591.analog_read(PCF8591.AIN1))
print("AIN2 ", pcf8591.analog_read(PCF8591.AIN2))
print("AIN3 ", pcf8591.analog_read(PCF8591.AIN3))

If you want to write a value:

pcf8591.analog_write(255)
utime.sleep(1)
pcf8591.analog_write(128)
utime.sleep(1)
pcf8591.analog_write(0)

You can also read and write voltage

pcf8591.voltage_write(3.3)
utime.sleep(1)
pcf8591.voltage_write(1.65)
utime.sleep(1)
pcf8591.voltage_write(0)

print("AIN0 ", pcf8591.voltage_read(PCF8591.AIN0))
print("AIN1 ", pcf8591.voltage_read(PCF8591.AIN1))
print("AIN2 ", pcf8591.voltage_read(PCF8591.AIN2))
print("AIN3 ", pcf8591.voltage_read(PCF8591.AIN3))

For the examples I use this wire schema on breadboard: esp32 and pcf8591 wiring

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PCF8591_micropython_library