using Raspberry Pi to control Arduino using pyFirmata
Setting up your Arduino for Firmata
Firmata control of the Arduino requires loading an Arduino with the
special Firmata sketch. You can download the Arduino software from the
Arduino website. After opening the Arduino IDE, follow these steps to
install Firmata on your Arduino:
Click File->Examples->Firmata->StandardFirmata
From the Tools->Board menu, select the type of Arduino you are using.
From the Tools->Serial Port menu, choose the USB port to which your Arduino is connected.
Click the upload button (it looks like a right arrow, just next to
the checkmark) and wait for your sketch to upload. A message in the
bottom black windowwill indicate success or failure
Once the Firmata sketch is loaded on your Arduino, you can test it out with the Firmata Test Program.
Controlling your Arduino from Python
Next, your Raspberry Pi must be setup with the python firmata libraries. Run the following commands:
Use a USB cable to connect the Arduino with the Raspberry Pi
(remember to use the big USB Standard A connector and not the smaller
Micro B power connector). You can now find the USB name of the Arduino
by running 'ls -lrt /dev/tty*'. On my Raspberry Pi, it was listed as
/dev/ttyUSB0. Remember this value for later.
Connecting to an Arduino
To control an Arduino from a Python script on your Raspberry Pi, you
must first import the Arduino and util classes from the pyfirmata
module. Then, create an object using the USB address you found in the
previous step
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