[TOC]

Body fat scale SDK Instructions - Android

aar package download link

key registered address

Overview

• What is elink body fat scale SDK?

The elink body fat scale SDK is a Bluetooth development tool provided to elink partners. The SDK implements and encapsulates the elink Bluetooth protocol and is responsible for the communication between the mobile phone App and the Bluetooth body fat scale device. Bluetooth body fat scale application.

• Scope of application

Partners who need to personalize their Android Bluetooth body fat scale APP.

Conditions of Use

1. Minimum version android4.4 (API 19)
2. The Bluetooth version used by the device requires 4.0 and above

Import SDK

repositories {
    flatDir {
        dirs 'libs'
    }
}


Step 1. Add the JitPack repository to your build file
Add it in your root build.gradle at the end of repositories:
    allprojects {
		repositories {
			...
			maven { url 'https://jitpack.io' }
		}
	}

Step 2. Add the dependency
	dependencies {
	        implementation 'com.github.elinkthings:BodyFatScaleSDKRepositoryAndroid:1.2.4'
	}


You can also use aar package dependency,Please download it into the project's libs yourself

permission settings

<!-In most cases, you need to ensure that the device supports BLE .-->
<uses-feature
    android: name = "android.hardware.bluetooth_le"
    android: required = "true" />

<uses-permission android: name = "android.permission.BLUETOOTH" />
<uses-permission android: name = "android.permission.BLUETOOTH_ADMIN" />

<!-Android 6.0 and above. Bluetooth scanning requires one of the following two permissions. You need to apply at run time .-->
<uses-permission android: name = "android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android: name = "android.permission.ACCESS_FINE_LOCATION" />

<!-Optional. If your app need dfu function .-->
<uses-permission android: name = "android.permission.INTERNET" />

6.0 and above systems need to locate permissions and need to obtain permissions manually

Start access

First configure the key and secret for the SDK, application address

  // Called in the application of the main project
  AiFitSDK.getInstance (). Init (this, key, secret);

Add below AndroidManifest.xml application tag

<application>
    ...

    <service android:name="aicare.net.cn.iweightlibrary.wby.WBYService"/>

</application>

You can directly make your own Activity class extendBleProfileServiceReadyActivity

public class MyActivity extends BleProfileServiceReadyActivity

      @Override
    protected void onCreate (Bundle savedInstanceState) {
        super.onCreate (savedInstanceState);
        // Judge whether the mobile device supports Ble
        if (! ensureBLESupported ()) {
            T.showShort (this, R.string.not_support_ble);
            finish ();
        }
        // Judge whether there is positioning permission, this method is not encapsulated. The specific code can be obtained in the demo, or you can call the permission method in your own way.
        initPermissions ();
        // Judge whether Bluetooth is on, if you need to change the style, you can do it yourself
        if (! isBLEEnabled ()) {
            showBLEDialog ();
        }
    }
 
    

scan the device, stop scanning the device, check the scan status

The APIs related to scanning are as follows. For details, please refer to the BleProfileServiceReadyActivity class. For details, refer to the sample project.

  // Call the startScan method to start scanning
  startScan ();
  // The getAicareDevice (final BroadData broadData) interface will call back to get a body fat scale device that complies with the Aicare protocol
    @Override
    protected void getAicareDevice (BroadData broadData) {
               // Body fat scale equipment in compliance with Aicare protocol
               
      
    }
// Call the stopScan method to stop scanning
 stopScan ();
// Call the isScanning method to see if it is scanning true: scanning; false: scanning stopped
 isScanning ();

Note: If it is a broadcast scale, you do not need to perform the connection operation. You can directly get the body fat data in the scan callback getAicareDevice (BroadData broadData) method. The broadcast scale calls stopScan () to get back no data.

 @Override
    protected void getAicareDevice (BroadData broadData) {
        // Broadcast scale can get data directly here
        if (broadData.getDeviceType () == AicareBleConfig.BM_09) {
            if (broadData.getSpecificData ()! = null) {
                 BM09Data data = AicareBleConfig.
                       getBm09Data (broadData.getAddress (), broadData.getSpecificData ());
            } else if (broadData.getDeviceType () == AicareBleConfig.BM_15) {
                    if (broadData.getSpecificData ()! = null) {
                        BM15Data data = AicareBleConfig.getBm15Data (broadData.getAddress (),
                                broadData.getSpecificData ());
                    }
           } else {
                  if (broadData.getSpecificData ()! = null) {
                        WeightData weightData =
                                AicareBleConfig.getWeightData (broadData.getSpecificData ());
                        
                    }
           }
           
    }

      

connect the device, disconnect the device

The APIs related to the connection are as follows, please refer to the BleProfileServiceReadyActivity class for details.

// Call the startConnect method to connect the body fat scale device
// can be obtained in the getAicareDevice (BroadData broadData) callback method.
// If there is no filtering in getAicareDevice (BroadData broadData), the broadcast should be filtered when connecting, see the demo connection for details.
startConnect (String address)
// You can get the connection status in onStateChanged
@Override
    public void onStateChanged (String deviceAddress, int state) {
        super.onStateChanged (deviceAddress, state);
        // state See the class description for specific status
    }
// Call the disconnect method in WBYService.WBYBinder class to disconnect the body fat scale
 binder.disconnect ()

Use the startConnect method to connect to the body fat scale, use theonStateChanged method to monitor the status of the connection, and use the onError method to monitor for exceptions during the connection process, in order to facilitate additional processing and troubleshooting. Use the isDeviceConnected method to determine whether a connection has been established.

Successful connection, accept the data returned by the scale

The following methods or interfaces are automatically obtained directly after inheriting the BleProfileServiceReadyActivity class

// OnServiceBinded method to get an instance of WBYService.WBYBinder
    @Override
    protected void onServiceBinded (WBYService.WBYBinder binder) {
        this.binder = binder;
      
   }
 // The change and stable weight data and temperature returned by the device (supported by AC03)
    @Override
    protected void onGetWeightData (WeightData weightData) {
         // If you want to get broadcast scale data here. Need to be in getAicareDevice (final BroadData broadData) method
         // Call onGetWeightData (WeightData weightData) to pass the data through
         
         
    }
// Get the setting status in the onGetSettingStatus method. For details, see AicareBleConfig.SettingStatus
    @Override
    protected void onGetSettingStatus (int status) {

    }
// Get the version number, measurement time, user number, and impedance value in the onGetResul method
    @Override
    protected void onGetResult (int index, String result) {
          
          
    }
// Get the device to return historical data or body fat data. True is historical data.
//Body fat data will only be generated after the current user is synchronized after STATE_INDICATION_SUCCESS
    @Override
    protected void onGetFatData (boolean isHistory, BodyFatData bodyFatData) {

    }
// Get information about the number of decimal places returned by the device
    @Override
    protected void onGetDecimalInfo (DecimalInfo decimalInfo) {

    }
// Algorithm sequence information returned by the device
    @Override
    protected void onGetAlgorithmInfo (AlgorithmInfo algorithmInfo) {

    }
    

Note: Some of these interfaces or methods require APP to issue commands to body fat to return data.

Call the algorithm to calculate the data in the SDK

• If the device returns impedance, and there is no body fat data, you can obtain the BodyFatData object by inheriting the onGetFatData method in BleProfileServiceReadyActivity, and call the AicareBleConfig.getBodyFatData method to calculate the cn.net.aicare.algorithmutil.BodyFatData object Instructions:

  AicareBleConfig.getBodyFatData(AlgorithmUtil.AlgorithmType.TYPE_AIC
  ARE, bodyFatData.getSex(), bodyFatData.getAge(),
  Double.valueOf(ParseData.getKgWeight(bodyFatData.getWeight(),
  bodyFatData.getDecimalInfo())), bodyFatData .getHeight(),
  bodyFatData.getAdc());
  

• If you need to get 6 additional body indicators such as body fat removal and weight control, please call AicareBleConfig.getMoreFatData to get MoreFatData object Instructions:

AicareBleConfig.getMoreFatData (int sex, int height, double weight,
double bfr, double rom, double pp)

Give instructions to the device

Get an instance of WBYService.WBYBinder in BleProfileServiceReadyActivity.onServiceBinded (WBYService.WBYBinder binder), and call the method in binder

    @Override
    protected void onServiceBinded (WBYService.WBYBinder binder) {
        this.binder = binder;

   }
   // If the history is obtained
      binder.syncHistory ();



   // Part of the method of WBYBinder
   public class WBYBinder extends LocalBinder {

        / **
         * Get history
         * /
        @Deprecated
        public void syncHistory () {
            mManager.sendCmd (AicareBleConfig.SYNC_HISTORY, AicareBleConfig.UNIT_KG);
        }

        / **
         * Synchronize the current user
         *
         * @param user
         * /
        public void syncUser (User user) {
            if (user == null) {
                return;
            }
            mManager.syncUser (user);
        }

        / **
         * Synchronized user list
         *
         * @param userList
         * /
        @Deprecated
        public void syncUserList (List <User> userList) {
            mManager.syncUserList (userList);
        }

        / **
         * Sync current unit
         *
         * @param unit {@link AicareBleConfig # UNIT_KG}
         * {@link AicareBleConfig # UNIT_LB}
         * {@link AicareBleConfig # UNIT_ST}
         * {@link AicareBleConfig # UNIT_JIN}
         * /
        public void syncUnit (byte unit) {
            mManager.sendCmd (AicareBleConfig.SYNC_UNIT, unit);
        }

        / **
         * synchronised time
         * /
        @Deprecated
        public void syncDate () {
            mManager.syncDate ();
        }

        / **
         * Query Bluetooth version information
         * /
        @Deprecated
        public void queryBleVersion () {
            mManager.sendCmd (AicareBleConfig.GET_BLE_VERSION, AicareBleConfig.UNIT_KG);
        }

        / **
         * Update user information
         *
         * @param user
         * /
        @Deprecated
        public void updateUser (User user) {
            if (user == null) {
                return;
            }
            mManager.updateUser (user);
        }

        / **
         * Setting mode
         * /
        public void setMode (@ AicareBleConfig.MODE int cmd) {
            mManager.setMode (cmd);
        }

        / **
         * Check if authorized
         * /
        @Deprecated
        public void auth () {
            mManager.auth ();
        }

        / **
         * Set DID
         *
         * @param did
         * /
        @Deprecated
        public void setDID (int did) {
            mManager.sendDIDCmd (AicareBleConfig.SET_DID, did);
        }

        / **
         * Query DID
         * /
        @Deprecated
        public void queryDID () {
            mManager.sendDIDCmd (AicareBleConfig.QUERY_DID, 0);
        }

        / **
         * Get the number of decimal places
         * /
        public void getDecimalInfo () {
            mManager.getDecimalInfo ();
        }

        ...
}

Class description

• aicare.net.cn.iweightlibrary.entity.AlgorithmInfo (Algorithm Sequence Information)

Type	Parameter	Description
double	weight	weight
int	algorithmId	algorithm ID
int	adc	impedance value
DecimalInfo	decimalInfo	number of decimal places

• BM09Data (BM09 data)

Type	Parameter	Description
int	agreementType	agreement type
int	unitType	unit type
DecimalInfo	decimalInfo	Decimal places
double	weight	Weight
int	adc	impedance value
double	temp	temperature
int	algorithmId	algorithm ID
int	did	currently useless
String	bleVersion	Bluetooth version
int	bleType	Bluetooth type (0x09)
String	address	device address
long	timeMillis	measurement timestamp
whether	boolean	isStable is stable

• BM15Data (BM15 data)

Type	Parameter	Description
String	version	Bluetooth version
int	agreementType	agreementType
int	unitType	unitType
double	weight	weight
int	adc	impedance value
double	temp	temperature (if temp = 6553.5, the scale does not support temperature)
int	algorithmId	algorithm ID
int	did	currently useless
int	bleType	Bluetooth type (0x15)
String	address	device address

• BodyFatData

Type	Parameter	Description
String	date	measurement date
String	time	time
double	weight	weight
double	bmi
double	bfr
double	sfr
int	uvi	visceral fat index
double	rom	muscle rate
double	bmr	basal metabolic rate
double	bm	bone mass
double	vwc	moisture content
double	bodyAge
double	pp	protein rate
int	number
int	sex
int	age	(1; male; 2, female)
int	height
int	adc	impedance value

• BroadData (broadcast data)

Type	Parameter	Description
String	name	device name
String	address	device address
boolean	isBright	Whether the screen is bright
int	rssi	signal value
byte	[] specificData	broadcast data
int	deviceType	device type

• DecimalInfo (decimal point information)

Type	Parameter	Description
int	sourceDecimal	source data decimal places
int	kgDecimal	kg number of decimal places
int	lbDecimal	lb decimal places
int	stDecimal	st number of decimal places
int	kg	Graduation kg
int	lb	Graduation lb

• User (User Information)

Type	Parameter	Description
int	id
int	sex
int	age	(1; male; 2, female)
int	height
int	weight
int	adc	impedance (deprecated)

• WeightData (weight data)

Type	Parameter	Description
int	cmdType	command type (1, change; 2, stable; 3, in impedance measurement)
double	weight
double	temp	temperature (if the temperature is Double.MAX_VALUE, the scale does not support temperature)
DecimalInfo	decimalInfo
int	adc	impedance value
int	algorithmType	algorithm ID
int	unitType
int	deviceType	device type

• cn.net.aicare.algorithmutil.BodyFatData(Calculated body fat data)

Type	Parameter	Description
double	bmi	Body mass index
double	bfr	body fat rate
double	sfr	Subcutaneous fat rate
int	uvi	Visceral fat index
double	rom	Rate of muscle
int	bmr	basal metabolic rate
double	bm	Bone Mass
double	vwc	Water content
int	bodyAge	physical bodyAge
double	pp	protein percentage

• MoreFatData

Type	Parameter	Description
double	standardWeight	Standard weight
double	controlWeight	Weight control
double	fat	Fat mass
double	removeFatWeight	Fat-free weight
double	muscleMass	Muscle mass
double	protein	Protein amount
MoreFatData.FatLevel fatLevel	Obesity grade

public static enum FatLevel {
        UNDER, // Underweight
        THIN,  // Thin
        NORMAL, // standard
        OVER, // Favor
        FAT;  overweight
}

• BleProfileService Connection Status

public static final int STATE_CONNECTING = 4; // connecting
public static final int STATE_DISCONNECTED = 0; // disconnect
public static final int STATE_CONNECTED = 1; // The connection was successful
public static final int STATE_SERVICES_DISCOVERED = 2; // Discover services
public static final int STATE_INDICATION_SUCCESS = 3; // Enable success
public static final int STATE_TIME_OUT = 5; // connection timed out

• AicareBleConfig.SettingStatus Status information returned by the device

int NORMAL = 0; // Normal
int LOW_POWER = 1; // Low power
int LOW_VOLTAGE = 2; // Low voltage
int ERROR = 3; // overload
int TIME_OUT = 4; // timeout
int UNSTABLE = 5; // Unstable
int SET_UNIT_SUCCESS = 6; // Set unit success
int SET_UNIT_FAILED = 7; // Set unit failed
int SET_TIME_SUCCESS = 8; // Successfully set time
int SET_TIME_FAILED = 9; // Failed to set time
int SET_USER_SUCCESS = 10; // Set user successfully
int SET_USER_FAILED = 11; // Failed to set user
int UPDATE_USER_LIST_SUCCESS = 12; // Update user list successfully
int UPDATE_USER_LIST_FAILED = 13; // Update user list failed
int UPDATE_USER_SUCCESS = 14; // Update user successfully
int UPDATE_USER_FAILED = 15; // Update user failed
int NO_HISTORY = 16; // There is no historical data
int HISTORY_START_SEND = 17; // historical data starts to be sent
int HISTORY_SEND_OVER = 18; // historical data transmission is complete
int NO_MATCH_USER = 19; // No matching users
int ADC_MEASURED_ING = 20; // Impedance measurement
int ADC_ERROR = 21; // Impedance measurement failed
int REQUEST_DISCONNECT = 22; // The device requested to disconnect
int SET_DID_SUCCESS = 23; // DID set successfully
int SET_DID_FAILED = 24; // Set DID failed
int DATA_SEND_END = 25; // Measured data transmission is complete
int UNKNOWN = -1; // unknown

• WBYService Bluetooth information returned by the device

public final static int BLE_VERSION = 0; // Bluetooth version
public final static int MCU_DATE = 1; // mcu date
public final static int MCU_TIME = 2; // mcu time
public final static int USER_ID = 3; // user number
public final static int ADC = 4; // impedance value

Version History

Version number	Update time	Author	Update information
1.0	2017/02/15	Suzy	Preliminary version
1.0.1	2017/07/31	Suzy	Fix some data conversion bugs
1.0.2	2017/09/11	Suzy	The type in the instruction is set according to the type of device actually connected
1.0.3	2017/11/16	Suzy	Code optimization
1.0.4	2018/07/12	Suzy	compatible broadcast scale
1.0.5	2018/01/15	Suzy	New protocol compatible
1.0.6	2018/02/25	Suzy	Function optimization
1.0.7	2018/02/28	Suzy	Encapsulated decimal point class
1.0.8	2018/03/14	Suzy	Fix the bug of wrong body age
1.0.9	2018/4/9	Suzy	Compatible with BM09 protocol
1.1.1	2018/5/10	Suzy	Compatible with kg / lb indexing protocol
1.1.2	2018/5/11	Suzy	Solve the bug that the st unit data is inconsistent with the scale display
1.1.3	2018/6/22	Suzy	Solve the bug that the decimal point is sometimes not available
1.1.4	2018/7/7	Suzy	Compatible with BM15 protocol
1.1.5	2018/7/20	Suzy	Compatible algorithm ID protocol
1.1.7	2019/04/30	Stan	Add BM15 body fat data calculation algorithm
1.1.8	2019/06/6	Stan	Modify the original data to lb, st calculation error problem
1.1.9	2019/12/19	Xing	Add history
1.2.0	2019/1/17	Xing	Update and optimize Bluetooth library
1.2.1	2020/3/19	Xing	Increase the calculation method of body fat data and the algorithm of lean body mass etc.
1.2.2	2020/3/23	Xing	Modify SDK to gradle form dependency
1.2.3	2020/4/2	Xing	Add key verification, modify the dependent environment to androidx
1.2.4	2020/4/10	Xing	Fix known bugs

FAQ

• How to judge whether the currently scanned BroadData (device) is a broadcast scale or a connected scale?

• According to the value of deviceType attribute of BroadData: deviceType == AicareBleConfig.TYPE_WEI_BROAD is a broadcast scale without temperature deviceType == AicareBleConfig.TYPE_WEI_TEMP_BROAD is a broadcast scale with temperature deviceType == AicareBleConfig.TYPE_WEI is a connected scale without temperature deviceType == AicareBleConfig.TYPE_WEI_TEMP is a connected scale with temperature

• Which units does the Bluetooth protocol support?

• Units only support up to 4 types (kg, lb, st, kg), please refer to the factory settings of the scale for specific units supported.

• Can’t scan the Bluetooth device?

• Check whether the permissions of the App are normal. The 6.0 and above systems must locate the permissions and need to manually obtain the permissions

• Check whether the location service of the mobile phone is turned on, some mobile phones may need to turn on the GPS

• Unplug the battery and restart the scale

• Whether it is connected by other mobile phones (when the scale is not connected, the Bluetooth icon on the weighing pan will continue to flash)

• Which devices are supported?

• Support BM series connection scale, BM15 broadcast scale

• How does the connected scale determine the end of measurement?

• OnGetFatData () method callback means the measurement is completed

• How do broadcast scales determine the end of measurement?

• All the data of the broadcast scale is returned from getAicareDevice and parsed to get the WeightData object. GetCmdType () == 3 in WeightData means the measurement is completed, please refer to the demo for details

• The data displayed by the scale is inconsistent with the data received by the app

• The SDK will request decimals by default, and you can use getDecimalInfo () in WBYBinder to actively obtain decimals

• When the app calculates the weight, it needs to pass in DecimalInfo (decimal object) for calculation

DecimalInfo {
    private int sourceDecimal; // The source data decimal places
    private int kgDecimal; // kg decimal places
    private int lbDecimal; // lb decimal places
    private int stDecimal; // st decimal places
    private int kgGraduation; // kg division
    private int lbGraduation; // lb division
}

• Why can I only measure my weight and no other body fat data?

• You must take off your shoes and socks and stand barefoot on the electrode pads of the body fat scale to measure body fat data.

• When weighing, the scale always displays Error, and the app shows that the impedance measurement has failed. What is the reason?

• Take off your shoes and socks and barefoot stand on the electrode pad of the body fat scale to measure, and then Error will no longer be displayed.

• How to provide feedback to technical support staff efficiently?

• The SDK will print the log on the console, please save the log as txt and send it to the technical staff when feedback the problem

• When feeding back the problem, describe the operation before and after the problem as clearly as possible. It is best to record a video to tell how to reproduce the problem.

• Are there any criteria and copy for body fat data?

• Body fat determination standards may vary from manufacturer to manufacturer, and there is currently no industry-recognized reference standard. The following are the standards used by our company for reference only: 《Bluetooth Body Fat Scale Judgment Standard and Mini Program Copy 20200416》

Contact Us

Shenzhen elink things Co., Ltd.

Phone: 0755-81773367

Official website: www.elinkthings.com

Email: app@elinkthings.com