Example Analysis of Serial Communication between Raspberry Pie and arduino

Editor to share with you a sample analysis of raspberry pie and arduino serial communication. I hope you will get something after reading this article. Let's discuss it together.

Serial communication between raspberry pie and arduino

Step 1: first set the hardware serial port to assign to the GPIO serial port

Enter the sudo raspi-config command to enter the raspberry pie system configuration interface and select the third Interfacing Options

Go in and choose Serial Port.

Then choose to turn off the serial login function and turn on the hardware serial port debugging function.

Modify the configuration file

Open the / boot/config.txt file, type sudo vim / boot/config.txt, and add two lines at the end: 1, dtoverlay=pi3-miniuart-bt 2, force_turbo=1

Then restart the raspberry pie, ls / dev-al to check the serial port

Serial port 0 corresponds to ttyAMA0 and serial port 1 corresponds to ttyS0, which means that the hardware serial port can communicate with others through GPIO at this time.

Step 2: write a test program

Raspberry pie:

Import serial import time port = "/ dev/ttyAMA0" ser = serial.Serial (port,115200,timeout=1) # / / Open the serial port and connect to ser.flushInput () # / / clear the input buffer while True: # ser.write ("7" .encode () ser.write ("s" .encode ()) Size = ser.inWaiting () # get the buffer character if size! = 0: response = ser.read (size); print (response) time.sleep (3)

Arduino:

Void setup () {Serial.begin (115200); / / define baud rate} void loop () {while (Serial.available () > 0) {char teststring = Serial.read (); Serial.println (teststring); if ('s'= = teststring) Serial.println ("Hello Raspberry,I am Arduino.");}}

Screenshots of test results:

The wiring is, R for raspberry pie to T for Arduino, T for raspberry pie to R for Arduino, and then connect to GND.

There are also programs in C language, so I don't bother to sort them out.

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