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Basic Example - Find Device

Find Device

Description

Demonstrates how to search the i2c bus for a device.

Code

#include "MAX1704X.h"

//
// Define the MAX17403 fuel gauge. Use MAX17044_mV
// for the MAX17044.
//
MAX1704X _fuelGauge = MAX1704X(MAX17043_mV);

void setup()
{
  //
  // Initialize the serial interface.
  //
  Serial.begin(115200);
  delay(250);

  //
  // Wait for serial port to connect.
  //
  while (!Serial) {}
  Serial.println("Serial port initialized.\n");

  //
  // Initialize the fuel gauge without an address.
  //
  Serial.println("Initializing the fuel gauge instance.");
  _fuelGauge.begin(DEFER_ADDRESS);

  //
  // Find a connected fuel gauge on the i2c bus.
  //
  Serial.println("Searching for device...");
  uint8_t deviceAddress = _fuelGauge.findFirstDevice();

  //
  // If a device is NOT found, the address returned will be 0.
  //
  if (deviceAddress > 0)
  {
    //
    // Set the device address.
    //
    _fuelGauge.address(deviceAddress);
    Serial.print("A MAX17043 device was found at address 0x"); Serial.println(_fuelGauge.address(), HEX);

    //
    // Reset the device.
    //
    Serial.println("Resetting device...");
    _fuelGauge.reset();
    delay(250);

    //
    // Issue a quickstart command and wait
    // for the device to be ready.
    //
    Serial.println("Initiating quickstart mode...");
    _fuelGauge.quickstart();
    delay(125);

    //
    // Display an initial reading.
    //
    Serial.println("Reading device...");
    Serial.println();
    displayReading();
  }
  else
  {
    Serial.println("A MAX17043 device was not found!");
    while (true);
  }
}

void loop()
{
  displayReading();
  delay(2000);
}

void displayReading()
{
  //
  // Get the voltage, battery percent
  // and other properties.
  //
  Serial.println("Device Reading:");
  Serial.print("Address:       0x"); Serial.println(_fuelGauge.address(), HEX);
  Serial.print("Version:       "); Serial.println(_fuelGauge.version());
  Serial.print("ADC:           "); Serial.println(_fuelGauge.adc());
  Serial.print("Voltage:       "); Serial.print(_fuelGauge.voltage()); Serial.println(" mV");
  Serial.print("Percent:       "); Serial.print(_fuelGauge.percent()); Serial.println("%");
  Serial.print("Is Sleeping:   "); Serial.println(_fuelGauge.isSleeping() ? "Yes" : "No");
  Serial.print("Alert:         "); Serial.println(_fuelGauge.alertIsActive() ? "Yes" : "No");
  Serial.print("Threshold:     "); Serial.print(_fuelGauge.getThreshold()); Serial.println("%");
  Serial.print("Compensation:  0x"); Serial.println(_fuelGauge.compensation(), HEX);
  Serial.println();
}