OBD Commands

A Command in python-OBD is an object used to query information from the vehicle. They contain all of the information neccessary to perform the query, and decode the cars response. Python-OBD has built in tables for the most common commands. They can be looked up by name, or by mode/PID (for a full list, see Command Tables).

import obd

c = obd.commands.RPM

# OR

c = obd.commands['RPM']

# OR

c = obd.commands[1][12] # mode 1, PID 12 (RPM)

Once a connection is made, python-OBD will determine which commands your car supports. The has_command() function can be used check support for any given command.

	import obd
	connection = obd.OBD()

	if connection.has_command(obd.commands.RPM):
		...

A list of all supported commands is stored in the supported_commands property of the connection object.

Methods

Commands.has_command(self, command):

Checks the internal command tables for the existance of the given OBDCommand object.

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Commands.has_name(self, name):

Checks the internal command tables for a command with the given name. This is also the function of the in operator.

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Commands.has_pid(self, mode, pid):

Checks the internal command tables for a command with the given mode and PID.