OpenSeaMap-dev:HW-logger/specification

For logging the water depth, users need a black box for doing this...

There are several systems of navigation instruments on board:

1. NMEA-0183 with single GPS and single sounder

2. NMEA-0183 export from a chart plotter, with connected GPS and sounder

3. NMEA-2000 with connected GPS and sounder

4. Chart plotters writing to an SD-card, (W)LAN or USB, with connected GPS and sounder

We need two HW-Loggers:

NMEA-0183

NMEA-2000

Skipper with PC and NMEA-0183 can use our SW-Logger (plus RS-232>USB converter).

Inhaltsverzeichnis

Nr		what for	Connector	Remarks
2	NMEA-0183	input	Lüsterklemme	2-channel, opto coupler
1	SD-card	output	slot
1	12 V	power	Lüsterklemme	5..30 V? <100 mA
1	Accelerometer	internal
1	Pulse generator	internal		Time stamping the sounder- and accelerometer data
1	Battery	internal		Buffering power interruption. Goldcap?

Processing: Listening to the two ports and the accelerometer; Time stamping the sounder- and accelerometer data by GPS-time plus pulse generator; Merging the data; Writing the merged data continuously into a file to the SD-chard; Starting new files; Handling of powerdown (closing the file)

Body: Standard (no IPx); Mountable by 2 screws on wood; 3x2 Lüsterklemme, 1x SD-Card-slot; 3 LED

Nr		what for	Connector	Remarks
1	NMEA-2000	input	MicroC	opto coupler
1	SD-card	output	slot
1	12 V	power	Lüsterklemme	5..30 V? <100 mA
1	Accelerometer	internal
1	Pulse generator	internal		Time stamping the sounder- and accelerometer data
1	Battery	internal		Buffering power interruption. Goldcap?
3	LED	operation indicator

Processing: Listening to the NMEA-port and the accelerometer; Time stamping the sounder- and accelerometer data by GPS-time plus pulse generator; Merging the data; Writing the merged data continuously into a file to the SD-chard; Starting new files; Handling of powerdown (closing the file)
Body: Standard (no IPx); Mountable by 2 screws on wood; 1x2 Lüsterklemme, 1x MicroC, 1x SD-Card-slot; 3 LED