Using the Raspberry Pi to control an LED might seem like a basic or boring task. However, the same hardware and programming concepts used to control an LED can be used to control a wide variety of sensors and modules. Learning how to control an LED with the Raspberry Pi’s GPIO pins will open u Contact online >>
Using the Raspberry Pi to control an LED might seem like a basic or boring task. However, the same hardware and programming concepts used to control an LED can be used to control a wide variety of sensors and modules. Learning how to control an LED with the Raspberry Pi’s GPIO pins will open up a whole new variety of devices you can use with the Raspberry Pi.
After connecting the hardware components, the next step is to create a Python program to switch on and off the LED. This program will make the LED turn on and off once every second and output the status of the LED to the terminal.
At the top of the program we import the RPi.GPIO and time libraries. The RPi.GPIO library will allow us to control the GPIO pins. The time library contains the sleep() function that we will use to make the LED pause for one second.
Now we need to change the on/off state of GPIO14 once every second. We do this with the GPIO.output() function. The first parameter of this function is the GPIO pin that will be switched high or low. We have the LED connected to GPIO14 in this circuit, so the first argument is 14.
The second parameter of the GPIO.output() function is the voltage state of the GPIO pin. We can use either GPIO.HIGH or GPIO.LOW as an argument to turn the pin on or off.
Each GPIO.output() function in the code above is followed by a sleep() function that causes the pin to hold its voltage state for the time (in seconds) defined in the parameter of the function. In this program we are switching the LED on and off once every second so the argument is 1. You can change this value to make the LED blink on and off faster or slower.
Hello,I''m your worst nightmare. I''m a newbie. I am using THONNE PYTHON IDE to edit and test the program. When I to RUN the program I received an error message: MODUAL NOT FOUND ERROR: NO MODULE BAMED ''RPi''.Question: Does THONNY import RPi.GPIO?Question: Can RPi.GPIO run on THONNY?Should I assume the ''import'' will only work on the RPi?Thank you All,Barry
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