PymataCore Usage Notes

When instantiating pymata_core, the arduino_wait parameter is set to a default value of 2 seconds. This value specifies the amount of time needed to allow the Arduino to complete a reset cycle. Make sure that this value is set to match the reset needs of your Arduino board type.

Here are some typical reset wait times by board type:

Board Type	Seconds
Uno	2 (default)
Leonardo	0
Teensy	5

For other board types, you may need to experiment with this value.

After instantiating the PymataCore class, you must call the start method to complete its instantiation.

Click here to see an example of setting a pin for PWM mode and then setting its output value to 128.

Connection Errors:

If you are seeing this message:

Do you have Arduino connectivity and do you have a Firmata sketch uploaded to the board?

You may need to use the com_port parameter to explicitly state the com port in use.