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https://codeberg.org/Freeyourgadget/Gadgetbridge
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Pebble: experiment with extensible notifications
This allows lot more flexible notifications including custom actions (replys, etc) When used without actions it could serve as a simple replacement for the current notifications. The main showstopper is that I do not know how to assign icons (mail, chat) to these. Unfortunately I ended up in recovery when playing around with unknown parameters trial&error style.
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@ -8,6 +8,7 @@ import org.slf4j.LoggerFactory;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.util.ArrayList;
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import java.util.Random;
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import java.util.SimpleTimeZone;
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import java.util.TimeZone;
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import java.util.UUID;
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@ -27,6 +28,9 @@ public class PebbleProtocol extends GBDeviceProtocol {
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private static final Logger LOG = LoggerFactory.getLogger(PebbleProtocol.class);
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// set to false AT YOUR OWN RISK. I ended up in recovery
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static private final boolean USE_OLD_NOTIFICATION_PROTOCOL = true;
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static final short ENDPOINT_FIRMWARE = 1;
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static final short ENDPOINT_TIME = 11;
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static final short ENDPOINT_FIRMWAREVERSION = 16;
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@ -43,6 +47,7 @@ public class PebbleProtocol extends GBDeviceProtocol {
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static final short ENDPOINT_APP = 2004;
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static final short ENDPOINT_APPLOGS = 2006;
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static final short ENDPOINT_NOTIFICATION = 3000;
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static final short ENDPOINT_EXTENSIBLENOTIFS = 3010;
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static final short ENDPOINT_RESOURCE = 4000;
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static final short ENDPOINT_SYSREG = 5000;
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static final short ENDPOINT_FCTREG = 5001;
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@ -153,10 +158,10 @@ public class PebbleProtocol extends GBDeviceProtocol {
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static final short LENGTH_SYSTEMMESSAGE = 2;
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private static final String[] hwRevisions = {"unknown", "ev1", "ev2", "ev2_3", "ev2_4", "v1_5", "v2_0"};
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private static Random mRandom = new Random();
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static byte last_id = -1;
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// FIXME: this does not belong here
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static final UUID WeatherNeatUUID = UUID.fromString("3684003b-a685-45f9-a713-abc6364ba051");
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static byte last_id = -1;
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private static byte[] encodeMessage(short endpoint, byte type, int cookie, String[] parts) {
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// Calculate length first
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@ -207,10 +212,14 @@ public class PebbleProtocol extends GBDeviceProtocol {
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Long ts = System.currentTimeMillis() / 1000;
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TimeZone tz = SimpleTimeZone.getDefault();
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ts += (tz.getOffset(ts) + tz.getDSTSavings()) / 1000;
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String tsstring = ts.toString(); // SIC
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String[] parts = {from, body, tsstring};
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return encodeMessage(ENDPOINT_NOTIFICATION, NOTIFICATION_SMS, 0, parts);
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if (USE_OLD_NOTIFICATION_PROTOCOL) {
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String[] parts = {from, body, ts.toString()};
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return encodeMessage(ENDPOINT_NOTIFICATION, NOTIFICATION_SMS, 0, parts);
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}
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String[] parts = {from, null, body};
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return encodeExtensibleNotification(mRandom.nextInt(), (int) (ts & 0xffffffff), parts);
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}
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@Override
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@ -246,6 +255,71 @@ public class PebbleProtocol extends GBDeviceProtocol {
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return buf.array();
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}
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private static byte[] encodeExtensibleNotification(int id, int timestamp, String[] parts) {
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// Calculate length first
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byte attributes_count = 0;
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int length = 21;
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if (parts != null) {
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for (String s : parts) {
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if (s == null || s.equals("")) {
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continue;
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}
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attributes_count++;
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length += (3 + s.getBytes().length);
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}
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}
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// Encode Prefix
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ByteBuffer buf = ByteBuffer.allocate(length + LENGTH_PREFIX);
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buf.order(ByteOrder.BIG_ENDIAN);
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buf.putShort((short) (length));
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buf.putShort(ENDPOINT_EXTENSIBLENOTIFS);
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buf.order(ByteOrder.LITTLE_ENDIAN); // !
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buf.put((byte) 0x00); // ?
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buf.put((byte) 0x01); // add notifications
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buf.putInt(0x00000002); // flags - ?
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buf.putInt(id);
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buf.putInt(0x00000000); // ANCS id
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buf.putInt(timestamp);
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buf.put((byte) 0x01); // layout - ?
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buf.put(attributes_count); // length attributes
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buf.put((byte) 0); // len actions - none so far
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byte attribute_id = 0;
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// Encode Pascal-Style Strings
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if (parts != null) {
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for (String s : parts) {
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attribute_id++;
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if (s == null || s.equals("")) {
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continue;
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}
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int partlength = s.getBytes().length;
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if (partlength > 255) partlength = 255;
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buf.put(attribute_id);
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buf.putShort((short) partlength);
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buf.put(s.getBytes(), 0, partlength);
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}
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}
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// ACTION
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/*
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buf.put((byte) 0x01);
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buf.put((byte) 0x02);
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buf.put((byte) 0x01);
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String actionstring = "test";
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buf.put((byte) 0x01);
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buf.putShort((short) 4);
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buf.put(actionstring.getBytes(), 0, 4);
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*/
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return buf.array();
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}
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public byte[] encodeGetTime() {
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ByteBuffer buf = ByteBuffer.allocate(LENGTH_PREFIX + LENGTH_GETTIME);
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buf.order(ByteOrder.BIG_ENDIAN);
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