Skip to main content

KN550

Device Version​

1. FirmVersion below 2.0.0​

1.Does not support time adjustment.

2.Supports obtaining battery power.

3.automatically deleting data after synchronizing historical data.

4.After pressing the power button M, the Bluetooth icon will flash on the screen.

2. FirmVersion 2.0.0​

1.Does not support time adjustment

2.Does not support obtaining battery power

3.Automatically deletes data after synchronizing historical data

4.After pressing the power button M, there is no Bluetooth icon on the screen, and the Bluetooth icon will only flash after the screen is successfully connected to the mobile device

3. FirmVersion 2.0.1 and above​

1.The firmware version is 2.0.1 and the isRightTime field is added. This field marks whether the historical data needs time correction (0: no need 1: need correction)）

2.Supports obtaining battery power

3.Historical data must be deleted by calling the delete interface, otherwise historical data will always exist

4.After pressing the power button M, there is no Bluetooth icon on the screen, and the Bluetooth icon will only flash after the screen is successfully connected to the mobile device

info
  1. Scan and connect KN-550BT blood pressure monitor.
  2. KN-550BT only support offline measurement.

Import KN550 module​

import {
  BP550BTModule,
  BPProfileModule
} from '@ihealth/ihealthlibrary-react-native';

Add and remove listener​

// add
const notifyListener = DeviceEventEmitter.addListener(BP550BTModule.Event_Notify,  (event) => {
    console.log(event);
});

// remove
notifyListener.remove();

API Reference​

Get device battery​

info

The KN-550BT doesn't support this feature on firmware 2.0.0.

BP550BTModule.getBattery(mac);

// Return value
const notifyListener = DeviceEventEmitter.addListener(BP550BTModule.Event_Notify,  (event) => {
    if (event.action === BPProfileModule.ACTION_BATTERY_BP) {
        console.log(event[BPProfileModule.BATTERY_BP]);
    }
});

Set local time to KN-550BT​

BP550BTModule.getFunctionInfo(mac);

// Return value
const notifyListener = DeviceEventEmitter.addListener(BP550BTModule.Event_Notify,  (event) => {
    if (event.action === BPProfileModule.ACTION_FUNCTION_INFORMATION_BP) {
        
        /**
         * Blood pressure measurement mode, up air measurement mode and down air measurement mode.
         * Up air measurement mode: measure blood pressure during the process of pressurization.
         * Down air measurement mode: raise the pressure to a certain leven and then slowly release it to measure blood pressure.
         * upAirMeasureFlg, true: up air measurement mode; false: down dir measurement mode.
         */
        console.log(event[BPProfileModule.FUNCTION_IS_UPAIR_MEASURE]);
        
        /**
         * It is used for measuring blood pressure on the arm or not.
         */
        console.log(event[BPProfileModule.FUNCTION_IS_ARM_MEASURE]);
        
        /**
         * It support detect angle of monitor. 
         */
        console.log(event[BPProfileModule.FUNCTION_HAVE_ANGLE_SENSOR]);
        
        /**
         * It support offline measurement mode or not.
         */
        console.log(event[BPProfileModule.FUNCTION_HAVE_OFFLINE]);

        /**
         * It support diagnosis of hemodynamic stability or not. It is always false for KN-550BT.
         */
        console.log(event[BPProfileModule.FUNCTION_HAVE_HSD]);
        
        /**
         * It support angle detection or not. It is always false for KN-550BT.
         */
        console.log(event[BPProfileModule.FUNCTION_HAVE_ANGLE_SETTING]);
        
        /**
         *  It support update firmware or not. It is always false for KN-550BT.
         */
        console.log(event[BPProfileModule.FUNCTION_IS_MULTI_UPLOAD]);
        
    }
});

Get number of history data​

BP550BTModule.getOfflineNum(mac);

// Return value
const notifyListener = DeviceEventEmitter.addListener(BP550BTModule.Event_Notify,  (event) => {
    if (e.action === BPProfileModule.ACTION_HISTORICAL_NUM_BP) {
        console.log(event[BPProfileModule.HISTORICAL_NUM_BP]);
    }
});

Get history data​

BP550BTModule.getOfflineData(mac);

// Return value
const notifyListener = DeviceEventEmitter.addListener(BP550BTModule.Event_Notify,  (event) => {
    if (event.action === BPProfileModule.ACTION_HISTORICAL_DATA_BP) {
        let dataArray = event[BPProfileModule.HISTORICAL_DATA_BP];
        if (dataArray == undefined) {
            result = "There is not offline data in device"
        }else {
            for (let i = 0; i < dataArray.length; i++) {
                let offlineData = dataArray[i];

                console.log(offlineData[BPProfileModule.MEASUREMENT_DATE_BP]);
                console.log(offlineData[BPProfileModule.HIGH_BLOOD_PRESSURE_BP]);
                console.log(offlineData[BPProfileModule.LOW_BLOOD_PRESSURE_BP]);
                console.log(offlineData[BPProfileModule.PULSE_BP]);
                console.log(offlineData[BPProfileModule.MEASUREMENT_AHR_BP]);
                console.log(offlineData[BPProfileModule.MEASUREMENT_HSD_BP]);
                console.log(offlineData[BPProfileModule.DATAID]);

                // only support firmware 2.0.1 or later
                console.log(offlineData[BPProfileModule.TIME_CALIBRATION]);
            }
        }
    }
});

Get KN-550BT display status​

BP550BTModule.getDisplayConfig();

// Return value
const notifyListener = DeviceEventEmitter.addListener(BP550BTModule.Event_Notify,  (event) => {
    if (e.action === BPProfileModule.ACTION_SHOW_CONFIG_BP) {
        console.log(event[BPProfileModule.IS_BACKLIGHT_ON_BP]);
        console.log(event[BPProfileModule.IS_CLOCK_ON_BP]);
    }
});

Set KN-550BT display status​

/**
 * lightOn: background light is on or off.
 * timeOn: show date on KN 550BT screen.
 */
BP550BTModule.setDisplayConfig(mac, lightOn, timeOn);

// Return value
const notifyListener = DeviceEventEmitter.addListener(BP550BTModule.Event_Notify,  (event) => {
    if (e.action === BPProfileModule.ACTION_SET_STATUS_DISPLAY_SUCCESS) {
        console.log("set display success");
    }
});

Get KN-550BT time​

info

Only Firmware 2.0.1 and above supprt this API

BP550BTModule.getTime();

// Return value
const notifyListener = DeviceEventEmitter.addListener(BP550BTModule.Event_Notify,  (event) => {
    if (e.action === BPProfileModule.ACTION_GET_TIME) {
        console.log(event["date"]);
    }
});

History data transfer finished​

info

After history data transfer is finished, this API will help you to clear the history data. Only Firmware 2.0.1 and above supprt this API. other firmware KN-550BT can clear history data automatically.

BP550BTModule.transferFinished();

// Return value
const notifyListener = DeviceEventEmitter.addListener(BP550BTModule.Event_Notify,  (event) => {
    if (e.action === BPProfileModule.ACTION_HISTORICAL_OVER_BP) {
        console.log("Finish data transfer");
    }
});

Get all connected devices​

BP550BTModule.getAllConnectedDevices();

// Return value
const notifyListener = DeviceEventEmitter.addListener(BP550BTModule.Event_Notify,  (event) => {
    console.log(event);
});

Disconnect KN-550BT device​

BP550BTModule.disconnect(mac);