node-ina219

Node.js Driver for Adafruit INA219.

This is a direct port to NodeJS from the C code created by Adafuit and posted at https://github.com/adafruit/Adafruit_INA219 quite some time ago. Looks like the Adafruit code has changed a lot since then, and this hasn't been maintained / reported.

Install

$ npm install ina219

Usage

  var ina219 = require('ina219');

  ina219.init();
  ina219.enableLogging(true);

  ina219.calibrate32V1A(function () {

    ina219.getBusVoltage_V(function (volts) {

      console.log("Voltage: " + volts);
      ina219.getCurrent_mA(function (current){

        console.log("Current (mA): " + current );
      });   
    });
  });

Classes

Ina219

Typedefs

onCompleteCallback : function

Callback for standard oncomplete

onHaveValueCallback : function

Callback for returning a single value

Ina219

Kind: global class

• Ina219
  • new Ina219()
  • .init(address, device)
  • .enableLogging(enable)
  • .writeRegister(register, value, callback)
  • .readRegister(register, callback)
  • .calibrate32V1A(callback)
  • .log(s)
  • .getBusVoltage_raw(callback)
  • .getShuntVoltage_raw(callback)
  • .getCurrent_raw(callback)
  • .getBusVoltage_V(callback)
  • .getShuntVoltage_mV(callback)
  • .getCurrent_mA(callback)

new Ina219()

Ina219 is the main class exported from the Node module

ina219.init(address, device)

Called to initilize the INA219 board, you should calibrate it after this.

Kind: instance method of Ina219

Param	Type	Description
address	string	Address you want to use. Defaults to INA219_ADDRESS
device	string	Device to connect to. Defaults to "/dev/i2c-1"

ina219.enableLogging(enable)

Enabled debug logging to console.log

Kind: instance method of Ina219

Param	Type	Description
enable	bool	True to enable, False to disable

ina219.writeRegister(register, value, callback)

Reads a 16 bit value over I2C

Kind: instance method of Ina219

Param	Type	Description
register	integer	Register to read from (One of INA219REG*)
value	integer	Value to be written
callback	writeRegisterCallback	Callback to be invoked when complete

ina219.readRegister(register, callback)

Reads a 16 bit value over I2C

Kind: instance method of Ina219

Param	Type	Description
register	integer	Register to read from (One of INA219REG*)
callback	onHaveValueCallback	Callback to be invoked when complete

ina219.calibrate32V1A(callback)

Configures to INA219 to be able to measure up to 32V and 1A of current. Each unit of current corresponds to 40uA, and each unit of power corresponds to 800mW. Counter overflow occurs at 1.3A. Note: These calculations assume a 0.1 ohm resistor is present

Kind: instance method of Ina219

Param	Type	Description
callback	onCompleteCallback	Callback to be invoked when complete

ina219.log(s)

Logs a string to the console if logging enabled

Kind: instance method of Ina219

Param	Type	Description
s	string	String to log

ina219.getBusVoltage_raw(callback)

Reads the raw bus voltage

Kind: instance method of Ina219

Param	Type	Description
callback	onHaveValueCallback	Callback to be invoked when complete.

ina219.getShuntVoltage_raw(callback)

Reads the raw shunt voltage

Kind: instance method of Ina219

Param	Type	Description
callback	onHaveValueCallback	Callback to be invoked when complete.

ina219.getCurrent_raw(callback)

Reads the raw current value

Kind: instance method of Ina219

Param	Type	Description
callback	onHaveValueCallback	Callback to be invoked when complete.

ina219.getBusVoltage_V(callback)

Gets the bus voltage in volts

Kind: instance method of Ina219

Param	Type	Description
callback	onHaveValueCallback	Callback to be invoked when complete.

ina219.getShuntVoltage_mV(callback)

Gets the shunt voltage in mV (so +-327mV)

Kind: instance method of Ina219

Param	Type	Description
callback	onHaveValueCallback	Callback to be invoked when complete.

ina219.getCurrent_mA(callback)

Gets the current value in mA, taking into account the config settings and current LSB

Kind: instance method of Ina219

Param	Type	Description
callback	onHaveValueCallback	Callback to be invoked when complete.

onCompleteCallback : function

Callback for standard oncomplete

Kind: global typedef

onHaveValueCallback : function

Callback for returning a single value

Kind: global typedef

Param	Type	Description
value	int	value returned by async operation