2017-05-07 13:30:26 +00:00
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iMet-1-AB
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GPS Chip:
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Trimble Lassen iQ
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ublox AMY-5M
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AFSK 2400 baud:
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1200Hz-Schwingung: Pause bzw. In/Out
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1x 2400Hz-Schwingung: bit 0
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2x 4800Hz-Schwingung: bit 1
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8 bit begrenzt durch In/Out
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204 byte pro Frame
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Beginn:
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69 69 69 69 69
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Ende:
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96 96 96 96 96 96 96 96 96
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double B60B60 = 0xB60B60; // 2^32/360 = 0xB60B60.xxx
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pos 0x8A 4byte: GPSTOW: sek (Trimble Lassen iQ), ms (ublox AMY-5M)
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pos 0x8E 4byte: GPSlat: /B60B60
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pos 0x92 4byte: GPSlon: /B60B60
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pos 0x96 4byte: GPSalt: Hoehe in mm
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//Velocity East-North-Up (ENU)
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2017-05-08 16:35:19 +00:00
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pos 0x84 2byte: GPSvO /2e2 // vielleicht 1.94e2 (m/s -> knots)?
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2017-05-07 13:30:26 +00:00
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pos 0x86 2byte: GPSvN /2e2
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pos 0x88 2byte: GPSvV /2e2
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Frame: <DLE><id><data_bytes><DLE><ETX>,
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<DLE>=0x10, <ETX>=0x03; <id>=0xb9
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(.. 69) 10 b9 01 .. .. 10 03 cs (96 ..)
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8bit-xor-checksum:
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xorsum(<DLE><id><data_bytes><DLE><ETX>),
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wobei 0x10 innerhalb <DLE> doppelt gesendet werden,
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zweimal zaehlen, wobei 0x10^0x10=0x00
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