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https://codeberg.org/Freeyourgadget/Gadgetbridge
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Added some javadocs
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@ -668,6 +668,10 @@ public class MiBandSupport extends AbstractBTLEDeviceSupport {
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}
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}
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/**
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* Utility method that may be used to log incoming messages when we don't know how to deal with them yet.
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* @param value
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*/
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private void logMessageContent(byte[] value) {
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LOG.info("RECEIVED DATA WITH LENGTH: " + value.length);
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for (byte b : value) {
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@ -675,6 +679,16 @@ public class MiBandSupport extends AbstractBTLEDeviceSupport {
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}
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}
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/**
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* React to unsolicited messages sent by the Mi Band to the MiBandService.UUID_CHARACTERISTIC_NOTIFICATION
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* characteristic,
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* These messages appear to be always 1 byte long, with values that are listed in MiBandService.
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* It is not excluded that there are further values which are still unknown.
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*
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* Upon receiving known values that request further action by GB, the appropriate method is called.
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*
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* @param value
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*/
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private void handleNotificationNotif(byte[] value) {
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if(value.length != 1) {
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LOG.error("Notifications should be 1 byte long.");
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@ -730,6 +744,14 @@ public class MiBandSupport extends AbstractBTLEDeviceSupport {
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}
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}
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/**
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* Convert an alarm from the GB internal structure to a Mi Band message and put on the specified
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* builder queue as a write message for the passed characteristic
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*
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* @param alarm
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* @param builder
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* @param characteristic
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*/
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private void queueAlarm(GBAlarm alarm, TransactionBuilder builder, BluetoothGattCharacteristic characteristic) {
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Calendar alarmCal = alarm.getAlarmCal();
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byte[] alarmMessage = new byte[]{
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@ -748,6 +770,18 @@ public class MiBandSupport extends AbstractBTLEDeviceSupport {
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builder.write(characteristic, alarmMessage);
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}
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/**
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* Method to handle the incoming activity data.
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* There are two kind of messages we currently know:
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* - the first one is 11 bytes long and contains metadata (how many bytes to expect, when the data starts, etc.)
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* - the second one is 20 bytes long and contains the actual activity data
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*
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* The first message type is parsed by this method, for every other length of the value param, bufferActivityData is called.
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* @see #bufferActivityData(byte[])
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*
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*
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* @param value
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*/
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private void handleActivityNotif(byte[] value) {
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boolean firstChunk = activityStruct == null;
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if (firstChunk) {
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@ -808,6 +842,13 @@ public class MiBandSupport extends AbstractBTLEDeviceSupport {
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return timestamp;
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}
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/**
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* Method to store temporarily the activity data values got from the Mi Band.
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*
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* Since we expect chunks of 20 bytes each, we do not store the received bytes it the length is different.
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*
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* @param value
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*/
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private void bufferActivityData(byte[] value) {
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if (activityStruct.activityDataRemainingBytes >= value.length) {
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@ -832,6 +873,10 @@ public class MiBandSupport extends AbstractBTLEDeviceSupport {
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}
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}
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/**
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* empty the local buffer for activity data, arrange the values received in groups of three and
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* store them in the DB
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*/
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private void flushActivityDataHolder() {
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if (activityStruct == null) {
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LOG.debug("nothing to flush, struct is already null");
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@ -869,6 +914,7 @@ public class MiBandSupport extends AbstractBTLEDeviceSupport {
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}
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}
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private void handleControlPointResult(byte[] value, int status) {
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if (status != BluetoothGatt.GATT_SUCCESS) {
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LOG.warn("Could not write to the control point.");
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@ -889,6 +935,15 @@ public class MiBandSupport extends AbstractBTLEDeviceSupport {
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getDevice().sendDeviceUpdateIntent(getContext());
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}
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/**
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* Acknowledge the transfer of activity data to the Mi Band.
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*
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* After receiving data from the band, it has to be acknowledged. This way the Mi Band will delete
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* the data it has on record.
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*
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* @param time
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* @param bytesTransferred
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*/
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private void sendAckDataTransfer(Calendar time, int bytesTransferred) {
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byte[] ack = new byte[]{
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MiBandService.COMMAND_CONFIRM_ACTIVITY_DATA_TRANSFER_COMPLETE,
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@ -970,6 +1025,20 @@ public class MiBandSupport extends AbstractBTLEDeviceSupport {
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LOG.info("MI Band pairing result: " + value);
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}
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/**
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* Prepare the MiBand to receive the new firmware data.
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* Some information about the new firmware version have to be pushed to the MiBand before sending
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* the actual firmare.
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*
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* The Mi Band will send a notification after receiving these data to confirm if the metadata looks good to it.
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* @see MiBandSupport#handleNotificationNotif
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*
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* @param currentFwVersion
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* @param newFwVersion
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* @param newFwSize
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* @param checksum
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* @return whether the transfer succeeded or not. Only a BT layer exception will cause the transmission to fail.
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*/
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private boolean sendFirmwareInfo(int currentFwVersion, int newFwVersion, int newFwSize, int checksum) {
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byte[] fwInfo = new byte[]{
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MiBandService.COMMAND_SEND_FIRMWARE_INFO,
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@ -997,6 +1066,16 @@ public class MiBandSupport extends AbstractBTLEDeviceSupport {
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return true;
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}
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/**
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* Method that uploads a firmware (fwbytes) to the MiBand.
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* The firmware has to be splitted into chunks of 20 bytes each, and periodically a COMMAND_SYNC comand has to be issued to the MiBand.
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*
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* The Mi Band will send a notification after receiving these data to confirm if the firmware looks good to it.
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* @see MiBandSupport#handleNotificationNotif
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*
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* @param fwbytes
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* @return whether the transfer succeeded or not. Only a BT layer exception will cause the transmission to fail.
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* */
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private boolean sendFirmwareData(byte fwbytes[]) {
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int len = fwbytes.length;
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final int packetLength = 20;
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