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KN550LT

The Android SDK supports KN550LT in v2.16.0 and above.

info
  1. Scan and connect the KN-550LT blood pressure monitor.
  2. KN-550LT keeps a single memory bank — getMemoryCount / getMemoryData / deleteMemoryData take no user-group argument.

Connection to device​

1. Listen to device notify​

private iHealthDevicesCallback miHealthDevicesCallback = new iHealthDevicesCallback() {

    @Override
    public void onScanDevice(String mac, String deviceType, int rssi, Map manufactorData) { }

    @Override
    public void onDeviceConnectionStateChange(String mac, String deviceType, int status, int errorID, Map manufactorData){ }

    @Override
    public void onScanError(String reason, long latency) { }

    @Override
    public void onScanFinish() { }

    @Override
    public void onDeviceNotify(String mac, String deviceType,
                                String action, String message) { }
};
int callbackId = iHealthDevicesManager.getInstance().registerClientCallback(miHealthDevicesCallback);
iHealthDevicesManager.getInstance().addCallbackFilterForDeviceType(callbackId, iHealthDevicesManager.TYPE_KN550LT);
iHealthDevicesManager.getInstance().addCallbackFilterForAddress(callbackId, String... macs);

2. Scan for KN-550LT devices​

iHealthDevicesManager.getInstance().startDiscovery(DiscoveryTypeEnum.KN550LT);

3. Connect to KN-550LT devices​

iHealthDevicesManager.getInstance().connectDevice("", mac, iHealthDevicesManager.TYPE_KN550LT);

Kn550LtControl control = iHealthDevicesManager.getInstance().getKn550LtControl(mac);

API reference​

Get device IDPS​

import com.ihealth.communication.control.Kn550LtControl;
import com.ihealth.communication.manager.iHealthDevicesManager;

Kn550LtControl control = iHealthDevicesManager.getInstance().getKn550LtControl(mDeviceMac);
control.getIdps();
// Return value — action: Kn550LtMessageKey.ACTION_IDPS_KN550
private iHealthDevicesCallback miHealthDevicesCallback = new iHealthDevicesCallback() {
    @Override
    public void onDeviceNotify(String mac, String deviceType, String action, String message) {
        if (Kn550LtMessageKey.ACTION_IDPS_KN550.equals(action)) {
            try {
                JSONObject obj = new JSONObject(message);
                String firmwareVersion = obj.getString(iHealthDevicesIDPS.FIRMWAREVERSION);
                String hardwareVersion = obj.getString(iHealthDevicesIDPS.HARDWAREVERSION);
                String protocolString = obj.getString(iHealthDevicesIDPS.PROTOCOLSTRING);
                String accessoryName = obj.getString(iHealthDevicesIDPS.ACCESSORYNAME);
                String modelNumber = obj.getString(iHealthDevicesIDPS.MODENUMBER);
                String manufacturer = obj.getString(iHealthDevicesIDPS.MANUFACTURER);
                String serialNumber = obj.getString(iHealthDevicesIDPS.SERIALNUMBER);
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }
};

Get battery​

Kn550LtControl control = iHealthDevicesManager.getInstance().getKn550LtControl(mDeviceMac);
control.getBattery();
// Return value — action: Kn550LtMessageKey.ACTION_BATTERY_BP
private iHealthDevicesCallback miHealthDevicesCallback = new iHealthDevicesCallback() {
    @Override
    public void onDeviceNotify(String mac, String deviceType, String action, String message) {
        if (Kn550LtMessageKey.ACTION_BATTERY_BP.equals(action)) {
            try {
                JSONObject obj = new JSONObject(message);
                int battery = obj.getInt(Kn550LtMessageKey.BATTERY_BP); // 0-100
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }
};

Get device time​

Kn550LtControl control = iHealthDevicesManager.getInstance().getKn550LtControl(mDeviceMac);
control.getTime();
// Return value — action: BpProfile.ACTION_GET_TIME
private iHealthDevicesCallback miHealthDevicesCallback = new iHealthDevicesCallback() {
    @Override
    public void onDeviceNotify(String mac, String deviceType, String action, String message) {
        if (BpProfile.ACTION_GET_TIME.equals(action)) {
            try {
                JSONObject obj = new JSONObject(message);
                String deviceTime = obj.getString(BpProfile.DEVICE_TIME);
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }
};

Get function information​

Kn550LtControl control = iHealthDevicesManager.getInstance().getKn550LtControl(mDeviceMac);
control.getFunctionInfo();
// Return value — action: Kn550LtMessageKey.ACTION_FUNCTION_INFORMATION_BP
private iHealthDevicesCallback miHealthDevicesCallback = new iHealthDevicesCallback() {
    @Override
    public void onDeviceNotify(String mac, String deviceType, String action, String message) {
        if (Kn550LtMessageKey.ACTION_FUNCTION_INFORMATION_BP.equals(action)) {
            try {
                JSONObject obj = new JSONObject(message);
                int status = obj.getInt(Kn550LtMessageKey.STATUS);
                boolean haveOffline = obj.getBoolean(Kn550LtMessageKey.FUNCTION_HAVE_OFFLINE);
                boolean armMeasure = obj.getBoolean(Kn550LtMessageKey.FUNCTION_IS_ARM_MEASURE);
                int memoryGroup = obj.getInt(Kn550LtMessageKey.MEMORY_GROUP);
                int maxMemoryCapacity = obj.getInt(Kn550LtMessageKey.MAX_MEMORY_CAPACITY);
                boolean selfUpdate = obj.getBoolean(Kn550LtMessageKey.FUNCTION_HAVE_SELF_UPDATE);
                int showUnit = obj.getInt(Kn550LtMessageKey.SHOW_UNIT);
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }
};

Get memory record count​

Kn550LtControl control = iHealthDevicesManager.getInstance().getKn550LtControl(mDeviceMac);
control.getMemoryCount();
// Return value — action: Kn550LtMessageKey.ACTION_GET_MEMORY_COUNT
private iHealthDevicesCallback miHealthDevicesCallback = new iHealthDevicesCallback() {
    @Override
    public void onDeviceNotify(String mac, String deviceType, String action, String message) {
        if (Kn550LtMessageKey.ACTION_GET_MEMORY_COUNT.equals(action)) {
            try {
                JSONObject obj = new JSONObject(message);
                int count = obj.getInt(Kn550LtMessageKey.MEMORY_COUNT);
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }
};

Get memory (history) data​

Data arrive in one or more BLE packets; the SDK assembles them and delivers a single notify when the transfer is complete.

Kn550LtControl control = iHealthDevicesManager.getInstance().getKn550LtControl(mDeviceMac);
control.getMemoryData();
// Return value — action: Kn550LtMessageKey.ACTION_GET_MEMORY_DATA
private iHealthDevicesCallback miHealthDevicesCallback = new iHealthDevicesCallback() {
    @Override
    public void onDeviceNotify(String mac, String deviceType, String action, String message) {
        if (Kn550LtMessageKey.ACTION_GET_MEMORY_DATA.equals(action)) {
            try {
                JSONObject root = new JSONObject(message);
                JSONArray historyArr = root.getJSONArray(Kn550LtMessageKey.MEMORY_DATA);
                for (int i = 0; i < historyArr.length(); i++) {
                    JSONObject obj = historyArr.getJSONObject(i);
                    String time = obj.getString(Kn550LtMessageKey.MEASUREMENT_DATE_BP);
                    int sys = obj.getInt(Kn550LtMessageKey.HIGH_BLOOD_PRESSURE_BP);
                    int dia = obj.getInt(Kn550LtMessageKey.LOW_BLOOD_PRESSURE_BP);
                    int heartRate = obj.getInt(Kn550LtMessageKey.PULSE_BP);
                    boolean bodyMovement = obj.getBoolean(Kn550LtMessageKey.BODY_MOVEMENT);
                    boolean cuffLoose = obj.getBoolean(Kn550LtMessageKey.CUF_LOOSE);
                    boolean haveIHB = obj.getBoolean(Kn550LtMessageKey.HAVE_IHB);
                    int timeFlag = obj.getInt(Kn550LtMessageKey.TIME_FLAG);
                    String dataID = obj.getString(Kn550LtMessageKey.DATAID);
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }
};

Delete memory data​

Kn550LtControl control = iHealthDevicesManager.getInstance().getKn550LtControl(mDeviceMac);
control.deleteMemoryData();
// Return value — action: Kn550LtMessageKey.ACTION_DELETE_MEMORY_DATA (message is often empty)
private iHealthDevicesCallback miHealthDevicesCallback = new iHealthDevicesCallback() {
    @Override
    public void onDeviceNotify(String mac, String deviceType, String action, String message) {
        if (Kn550LtMessageKey.ACTION_DELETE_MEMORY_DATA.equals(action)) {
            // Delete completed
        }
    }
};

Disconnect KN-550LT device​

Kn550LtControl control = iHealthDevicesManager.getInstance().getKn550LtControl(mDeviceMac);
control.disconnect();
// Return value
private iHealthDevicesCallback miHealthDevicesCallback = new iHealthDevicesCallback() {
     @Override
    public void onDeviceConnectionStateChange(String mac, String deviceType, int status, int errorID, Map manufactorData) {
        if (iHealthDevicesManager.DEVICE_STATE_DISCONNECTED == status) {
            // Disconnected
        }
    }
};

Release control (optional)​

Kn550LtControl control = iHealthDevicesManager.getInstance().getKn550LtControl(mDeviceMac);
if (control != null) {
    control.destroy();
}

Errors and command timeout​

Kn550LtControl treats Kn550LtMessageKey.ACTION_ERROR_BP (error_bp), communication timeout (action_communication_timeout), and the actions listed above as completion paths. Compare action with iHealthDevicesManager.IHEALTH_COMM_TIMEOUT where you handle timeouts globally.

if (Kn550LtMessageKey.ACTION_ERROR_BP.equals(action)) {
    JSONObject obj = new JSONObject(message);
    int errorId = obj.getInt(BpProfile.ERROR_NUM_BP);
    String errorMessage = obj.getString(BpProfile.ERROR_DESCRIPTION_BP);
}