2015-06-17 06:49:52 +00:00
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Modulation AFSK 2400 baud
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3000 Hz : bit 0
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4800 Hz : bit 1
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bits : little endian -> byte
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bytes: big endian -> int-value
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bytes getrennt durch 4 bit 1110
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Datenpaket besteht aus 8 byte:
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header 2 byte 00FF
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2015-06-17 08:05:24 +00:00
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pck_id 1 byte N
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2015-06-17 06:49:52 +00:00
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data 4 byte val (big endian)
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2015-06-17 08:05:24 +00:00
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chksum 2 byte (byte1: Summe der bytes von pck_id+val & 0xFF)
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2015-06-17 06:49:52 +00:00
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2015-06-17 08:05:24 +00:00
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Telemetrie pck_id N:
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2015-06-17 06:49:52 +00:00
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0x14: date: 0x00027173 = 160115 -> 2015-01-16
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0x15: time: 0x0001E73F = 124735 -> 12:47:35
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0x16: lat : 0x02D39C9B = 47422619 -> 47+422619/600000=47.704365°
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0x17: lon : 0x006CB603 = 7124483 -> 7+124483/600000=7.2074717°
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0x18: alt : 0x0004AB21 = 305953 -> 305953/10 = 30595.3m
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GPS-lat/lon wie NMEA mit Faktor 1e4
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