Welcome to 8-Channel Tracking Module repository

IO method

Raspberry Pi - IO method

Raspberry Pi - IO methodExperimental preparationExperimental purposeExperimental wiringExperimental steps and phenomenaExperimental source code

Experimental preparation

Raspberry Pi motherboard
8-channel line patrol module
Several Dupont cables

The Raspberry Pi board needs to download the IO communication source code provided in the document

Experimental purpose

The content of this experiment is mainly to use the Raspberry Pi main control to receive the data of the 8-channel line patrol module through IO.

Experimental wiring

Raspberry Pi	8-channel line patrol module
GPIO.21	x1
GPIO.22	x2
GPIO.23	x3
GPIO.24	x4
GPIO.25	x5
GPIO.27	x6
GPIO.28	x7
GPIO.29	x8
5V	5V
GND	GND

As shown in the figure:

Experimental steps and phenomena

After connecting the wires, do not power on for wiring, power off for wiring Run the script


python3 IR_IO.py

Experimental source code


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try:
    while True:
        # Read pin level
        pin_state_x1 = GPIO.input(x1)
        pin_state_x2 = GPIO.input(x2)
        pin_state_x3 = GPIO.input(x3)
        pin_state_x4 = GPIO.input(x4)
        pin_state_x5 = GPIO.input(x5)
        pin_state_x6 = GPIO.input(x6)
        pin_state_x7 = GPIO.input(x7)
        pin_state_x8 = GPIO.input(x8)
        
        print("x1:"+str(pin_state_x1)+"  x2:"+str(pin_state_x2)+"  x3:"+str(pin_state_x3)+"  x4:"+str(pin_state_x4)+"  x5:"+str(pin_state_x5)+"  x6:"+str(pin_state_x6)+"  x7:"+str(pin_state_x7)+"  x8:"+str(pin_state_x8)) 
        # Wait for a while
        time.sleep(1)
finally:
    # Clean up GPIO settings
    GPIO.cleanup()

The main function of the source code is very simple. It reads the probe pins of 8 patrol lines through IO and prints them out.

I2C method

Serial Port method