Only a single stepper motor is supported. :param stepper_pins: a list of control pin numbers - either 4 or 2 pins :param steps_per_revolution: number of steps per motor revolution hc-sr04_distance_sensor.py set_pin_mode_stepper def set_pin_mode_stepper(self, steps_per_revolution, stepper_pins)Ĭonfigure stepper motor prior to operation.

:param callback: optional callback function to report sonar data changes :param echo_pin: The pin number for the received echo. :param trigger_pin: The pin number of for the trigger (transmitter). Callback isĬalled only when the the latest value received is different than the previous. If the maximum is exceeded a message is sent to the console and Up to a maximum of 6 SONAR devices is supported. servo.py set_pin_mode_sonar def set_pin_mode_sonar(self, trigger_pin, echo_pin, callback=None, timeout=80000)Ĭonfigure the pins,ping interval and maximum distance for i2c_adxl345_accelerometer.py set_pin_mode_servo def set_pin_mode_servo(self, pin, min_pulse=544, max_pulse=2400)Ĭonfigure a pin as a servo pin. See i2c_read, i2c_read_continuous, or i2c_read_restart_transmission.ġ. NOTE: Callbacks are set within the individual i2c read methods of this API. :param read_delay_time (in microseconds): an optional parameter, default is 0 This method initializes Firmata for I2c operations. NOTE: THIS METHOD MUST BE CALLED BEFORE ANY I2C REQUEST IS MADE: set_pin_mode_i2c def set_pin_mode_i2c(self, read_delay_time=0)Įstablish the standard Arduino i2c pins for i2c utilization. You may reset the differential value by calling this method again with new a differntial value. :param differential: This value needs to be met for a callbackĮRROR CODES: If either humidity or temperature value: :param pin_number: digital pin number on arduino. DEVICE TYPE PIN MODES set_pin_mode_dht def set_pin_mode_dht(self, pin_number, sensor_type=22, differential=.1, callback=None):Ĭonfigure a DHT sensor prior to operation. To determine which pins support PWM for your board. Only specific digital pins support PWM mode. Set_pin_mode_pwm_output def set_pin_mode_pwm_output(self, pin_number) set_pin_mode_digital_output def set_pin_mode_digital_output(self, pin_number) The pin_type for digital input pins with pullups enabled = 11ĭata reporting via callbacks for this pin begins immediately after this method is called. Set a pin as a digital input with pullup enabled. set_pin_mode_digital_input_pullup def set_pin_mode_digital_input_pullup(self, pin_number, callback=None)

Data reporting via callbacks for this pin begins immediately after this method is called.ĭIGITAL PIN MODES set_pin_mode_digital_input def set_pin_mode_digital_input(self, pin_number, callback=None)ĭata reporting via callbacks for this pin begins immediately after this method is called.

Pymata4 refers to analog pins using the numeric portion of the pin number only.įor example, pin A3 is referred to as pin 3.

Input that may constantly fluctuate by a small value, and you wish to ignore the noise. Is greater than the differential parameter, then the callback is invoked. If the difference, either positive or negative,

When an analog input message is received from Firmata, the current reportedĭata value is compared with that of the previously reported value.

:param differential: This value needs to be met for a callback to be invoked. ANALOG PIN MODE set_pin_mode_analog_input def set_pin_mode_analog_input(self, pin_number, callback=None, differential=1) For each API method, a link to an example is

In this section, the methods to set pin modes are presented. Pymata4 requires that before using a pin, its mode must be explicitly set. Looking at a Mega2560 which has 54 digital pins: In general, to find the digital equivalent of pin A0 for your specificĭigital_pin_number = analog_pin_number + number of digital pins When configuring an analog input pin as a digital input, you must use the pin's digital pin number equivalent.įor example, on an Arduino Uno, if you wish to use pin A0 as a digital pin, Mapping Analog Pin Numbers To Digital Pin Numbers They may be configured for analog input, digital input, or digital output operation. The modes available to any given pin is dependent upon pin type.Ī digital pin may be configured for input, output, and for some digital pins, PWM output operation. Writing Values To Pins And Selected DevicesĪn Arduino pin can be configured to operate in one of several modes. Mapping Analog Pin Numbers To Digital Pin NumbersĮnabling/Disabling Analog And Digital Reporting

Arduino mega 2560 analog pins