Time.sleep(2) //this is required because the arduino resets when a serial connection is established
Yours could be ACM0 or it could be something else. read up on how to get your raspberry pi to tell you what the correct serial port name is! It can’t import itself! Here is what the file contains: BTW, DO NOT name your file serial.py as that will cause problems when it ties to “import serial”. On the Raspberry Pi in Python I created a file called serial_test.py. Unfortunately, the world is an imperfect place. I wish people who posted tutorials would try to execute them EXACTLY as written to make sure they work before releasing them into the wild. I wanted to do this because I WAS using a line level converter board and I wanted to simplify my project: It eliminates a board, a pile of wires, and a wall wart power supply! Like most tutorials, there are a few things that are missing. I am sending data from the Raspberry Pi to the Arduino via the USB cable. I just hacked away at this for the past few hours to get it working. For example we could control some motor or LCD on the Arduino from the Raspberry Pi. There you go, be creative and you will find there are so many things you can do. Now you should see the LED on the Arduino light up 3 times. On the Raspberry Pi Side, you need to type ser.write('3') In this example, Raspberry Pi will be sending back a single number, and the Arduino will turn on and off the LED on Pin 12 so many times. You can press Ctrl + C to stop (interrupt) the Python program. Messages ‘Hi’ should now start to appear every 2 seconds. You will need two hit enter twice after you type the second line. Now lets start a loop listening for messages from the Arduino. The second argument – 9600 is the baud rate and should match with what you set in the Arduino program. If a new name appears, then this is the name of your port. Now plug in your Arduio and run the command again. To find out the port name, we need to run this command in terminal without Arduino plugged in: ls /dev/tty* The first argument – /dev/ttyACM0 is the name for the USB interface used. You will find this from the menu under Programming, you should use Python 2 not 3. We will send ‘Hi’ from the Arduino to the Raspberry Pi every 2 seconds.
People have used it before with Arduino, so it’s been proven to be working, you can check this out. First of all, make sure you have installed pySerial, which gives you the ability to read from and write to the serial port with Python Programming language. To Demonstrate how this works, I will be doing two little projects, one for data going to Raspberry Pi from Arduino, the other one for the opposite.
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