MarcoBuster/Gadgetbridge
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Code Releases Wiki Activity

Improved time conversion (0x2A0F)

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- support for org.bluetooth.characteristic.local_time_information
- support for day of week in 0x2A2B

Unfortunately Mi Band 2 does not support 0x2A0F ;(
This commit is contained in:
cpfeiffer 2016-08-15 00:40:35 +02:00
parent 6843b5aa8f
commit 9b7e8e06d6
1 changed files with 60 additions and 1 deletions
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61
app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/btle/BLETypeConversions.java
View File

@ -2,6 +2,7 @@ package nodomain.freeyourgadget.gadgetbridge.service.btle;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.TimeZone;
import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandCoordinator;
@ -32,6 +33,9 @@ public class BLETypeConversions {
}
}
// MiBand2:
// year,year,month,dayofmonth,hour,minute,second,dayofweek,0,0,tz
byte[] year = fromUint16(timestamp.get(Calendar.YEAR));
return new byte[] {
year[0],
@ -40,10 +44,22 @@ public class BLETypeConversions {
fromUint8(timestamp.get(Calendar.DATE)),
fromUint8(timestamp.get(Calendar.HOUR_OF_DAY)),
fromUint8(timestamp.get(Calendar.MINUTE)),
fromUint8(timestamp.get(Calendar.SECOND))
fromUint8(timestamp.get(Calendar.SECOND)),
dayOfWeekToRawBytes(timestamp),
0 // fractions256 (not set)
};
}
private static byte dayOfWeekToRawBytes(Calendar cal) {
int calValue = cal.get(Calendar.DAY_OF_WEEK);
switch (calValue) {
case Calendar.SUNDAY:
return 7;
default:
return (byte) (calValue - 1);
}
}
/**
* uses the standard algorithm to convert bytes received from the MiBand to a Calendar object
*
@ -109,4 +125,47 @@ public class BLETypeConversions {
System.arraycopy(end, 0, result, start.length, end.length);
return result;
}
public static byte[] calendarToLocalTimeBytes(GregorianCalendar now) {
byte[] result = new byte[2];
result[0] = mapTimeZone(now.getTimeZone());
result[1] = mapDstOffset(now);
return result;
}
/**
* https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.time_zone.xml
* @param timeZone
* @return sint8 value from -48..+56
*/
public static byte mapTimeZone(TimeZone timeZone) {
int utcOffsetInMinutes = (timeZone.getRawOffset() / (1000 * 60 * 60));
return (byte) (utcOffsetInMinutes * 4);
}
/**
* https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.dst_offset.xml
* @param Calendar
* @return the DST offset for the given time; 0 if none; 255 if unknown
*/
public static byte mapDstOffset(Calendar now) {
TimeZone timeZone = now.getTimeZone();
int dstSavings = timeZone.getDSTSavings();
if (dstSavings == 0) {
return 0;
}
if (timeZone.inDaylightTime(now.getTime())) {
int dstInMinutes = dstSavings / (1000 * 60);
switch (dstInMinutes) {
case 30:
return 2;
case 60:
return 4;
case 120:
return 8;
}
return fromUint8(255); // unknown
}
return 0;
}
}