adafruit_ina219

CircuitPython driver for the INA219 current sensor.

• Author(s): Dean Miller

Implementation Notes

Hardware:

• Adafruit INA219 High Side DC Current Sensor Breakout

• Adafruit INA219 FeatherWing

Software and Dependencies:

• Adafruit CircuitPython firmware (2.2.0+) for the ESP8622 and M0-based boards: https://github.com/adafruit/circuitpython/releases

• Adafruit’s Bus Device library: https://github.com/adafruit/Adafruit_CircuitPython_BusDevice

class adafruit_ina219.ADCResolution

Constants for bus_adc_resolution or shunt_adc_resolution

class adafruit_ina219.BusVoltageRange

Constants for bus_voltage_range

class adafruit_ina219.Gain

Constants for gain

class adafruit_ina219.INA219(i2c_bus: I2C, addr: int = 64)

Driver for the INA219 current sensor

property bus_voltage: float

The bus voltage (between V- and GND) in Volts

property calibration: int

Calibration register (cached value)

property current: float

The current through the shunt resistor in milliamps.

property power: float

The power through the load in Watt.

set_calibration_16V_400mA() → None

Configures to INA219 to be able to measure up to 16V and 400mA of current. Counter overflow occurs at 1.6A.

Note

These calculations assume a 0.1 ohm shunt resistor is present

set_calibration_16V_5A() → None

Configures to INA219 to be able to measure up to 16V and 5000mA of current. Counter overflow occurs at 8.0A.

Note

These calculations assume a 0.02 ohm shunt resistor is present

set_calibration_32V_1A() → None

Configures to INA219 to be able to measure up to 32V and 1A of current. Counter overflow occurs at 1.3A.

Note

These calculations assume a 0.1 ohm shunt resistor is present

set_calibration_32V_2A() → None

Configures to INA219 to be able to measure up to 32V and 2A of current. Counter overflow occurs at 3.2A.

Note

These calculations assume a 0.1 shunt ohm resistor is present

property shunt_voltage: float

The shunt voltage (between V+ and V-) in Volts (so +-.327V)

class adafruit_ina219.Mode

Constants for mode