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G470
,==User Manual==
===PCF8591===
Test image version: 2022-04-04-raspios-bullseye-armhf.img Raspberry pi 4B
Enable I2C
sudo nano /boot/config.txt
[[File: Pi-sensor-board-01.png|400px]]
Ensure that I2C is on, and then restart the system.
sudo reboot
After restart, address 48 can be detected by I2C address detection command.
i2cdetect -y 1
[[File: Pi-sensor-board-02.png|400px]]
Ensure that jumper caps are connected to PCF.
[[File:Rpi-all-gpio-test-board-b-03.jpg|400px]]
Download sample codepcf8591
run command
cd pcf8591/
sudo python pcf8591_adc.py
[[File: Pi-sensor-board-04.png|400px]]
Phenomenon:
4-channel print AD value
DAC
run command
sudo python pcf8591_dac.py
[[File: Pi-sensor-board-05.png|400px]]
Phenomenon:
The LED lamp changes with the output value of DAC, and the brightness changes.
===LED===
Make sure that the jumper caps are connected to the LED.
[[File: Rpi-all-gpio-test-board-b-06.jpg|400px]]
Download GPIO_Test.py to raspberry pi.
run command
sudo python GPIO_Test.py
Phenomenon:
The power indicator LED is always on, and the GPIO connection LED is turned on in turn, and then turned off in turn, continuously circulating
==FAQ==