mirror of
https://codeberg.org/Freeyourgadget/Gadgetbridge
synced 2024-11-04 09:17:29 +01:00
Improved time conversion (0x2A0F)
- support for org.bluetooth.characteristic.local_time_information - support for day of week in 0x2A2B Unfortunately Mi Band 2 does not support 0x2A0F ;(
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6843b5aa8f
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@ -2,6 +2,7 @@ package nodomain.freeyourgadget.gadgetbridge.service.btle;
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import java.util.Calendar;
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import java.util.GregorianCalendar;
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import java.util.TimeZone;
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import nodomain.freeyourgadget.gadgetbridge.devices.miband.MiBandCoordinator;
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@ -32,6 +33,9 @@ public class BLETypeConversions {
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}
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}
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// MiBand2:
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// year,year,month,dayofmonth,hour,minute,second,dayofweek,0,0,tz
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byte[] year = fromUint16(timestamp.get(Calendar.YEAR));
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return new byte[] {
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year[0],
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@ -40,10 +44,22 @@ public class BLETypeConversions {
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fromUint8(timestamp.get(Calendar.DATE)),
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fromUint8(timestamp.get(Calendar.HOUR_OF_DAY)),
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fromUint8(timestamp.get(Calendar.MINUTE)),
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fromUint8(timestamp.get(Calendar.SECOND))
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fromUint8(timestamp.get(Calendar.SECOND)),
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dayOfWeekToRawBytes(timestamp),
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0 // fractions256 (not set)
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};
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}
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private static byte dayOfWeekToRawBytes(Calendar cal) {
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int calValue = cal.get(Calendar.DAY_OF_WEEK);
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switch (calValue) {
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case Calendar.SUNDAY:
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return 7;
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default:
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return (byte) (calValue - 1);
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}
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}
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/**
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* uses the standard algorithm to convert bytes received from the MiBand to a Calendar object
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*
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@ -109,4 +125,47 @@ public class BLETypeConversions {
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System.arraycopy(end, 0, result, start.length, end.length);
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return result;
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}
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public static byte[] calendarToLocalTimeBytes(GregorianCalendar now) {
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byte[] result = new byte[2];
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result[0] = mapTimeZone(now.getTimeZone());
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result[1] = mapDstOffset(now);
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return result;
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}
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/**
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* https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.time_zone.xml
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* @param timeZone
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* @return sint8 value from -48..+56
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*/
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public static byte mapTimeZone(TimeZone timeZone) {
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int utcOffsetInMinutes = (timeZone.getRawOffset() / (1000 * 60 * 60));
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return (byte) (utcOffsetInMinutes * 4);
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}
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/**
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* https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.characteristic.dst_offset.xml
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* @param Calendar
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* @return the DST offset for the given time; 0 if none; 255 if unknown
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*/
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public static byte mapDstOffset(Calendar now) {
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TimeZone timeZone = now.getTimeZone();
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int dstSavings = timeZone.getDSTSavings();
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if (dstSavings == 0) {
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return 0;
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}
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if (timeZone.inDaylightTime(now.getTime())) {
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int dstInMinutes = dstSavings / (1000 * 60);
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switch (dstInMinutes) {
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case 30:
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return 2;
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case 60:
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return 4;
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case 120:
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return 8;
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}
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return fromUint8(255); // unknown
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}
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return 0;
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}
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}
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