Control and program Raspberry Pi GPIO with “sysfs” (shell/bash)
The GPIOs are represented on Raspberry Pi as files and can be found in the directory tree under “/ sys / class / gpio”. This is called “sysfs”. If you look at the contents of the files, you get the state out. This is either “1” or “0”.
[Read more…] about Control Raspberry Pi GPIO with sysfsControl and program Raspberry Pi GPIO with “wiringPi” (shell/bash)
For easy control and programming of the GPIOs oftRaspberry Pi, the command line “wiringPi” has been used for a long time. Using simple commands, the GPIOs can be controlled and programmed
[Read more…] about Raspberry pi install wiringPiControl and program Raspberry Pi pigpio (shell/bash)
Compared to controlling and programming the GPIOs via “sysfs”, “pigpio” on the command line is a simplification. The command line tool “pigs” also supports the programming of a GPIO as PWM and servo.
“pigpio” is also the preferred method for controlling and programming the GPIOs on the command line.
Raspberry Pi configure GPIO at system startup
Before you can use a GPIO as input or output, it must be configured or set. Unfortunately, Raspberry Pi does not remember this setting. Therefore, the setting must be executed again each time the system is restarted.
[Read more…] about Configure Raspberry Pi GPIO at system startupMeasurements of voltage and current at the GPIO output
3.3V pin and 5V pin under load
Anyone experimenting with electronic components and circuits on Raspberry Pi will be plugging in the 3.3V, 5V and GPIO pins. As a rule, one will rely on the well-known electrical values of these pins.
[Read more…] about Raspberry Pi measurements of voltage and current at the GPIO