AGPS Download

[mru00]

Download EPO file from http://epodownload.mediatek.com/EPO.DAT to the watch
Download MTK7d.EPO from krippl ftp server.

http://www.gtop-tech.com/en/software/Software_Services_07.html

http://sourceforge.net/p/bt747/feature-requests/17/

http://forum.xda-developers.com/wiki/Fairphone_Fairphone/Guides

https://docs.google.com/file/d/0ByI4WbhJsiyqZjVjNTczNWEtZjczYi00YjY4LTlmMTgtNGIxZDcxZmFhMjEw/edit?hl=en&pli=1

ftp://ftp.leadtek.com.tw/gps/9023/G-monitor%203.26/User%20Manual/EPO%20Format%20and%20Protocol/LEADTEK%20EPO%20Format%20and%20Protocol%20Reference%20Manual%20V1.0.pdf

http://www.bt747.org/article/agps-servers

[mru00]

First step implemented, in testing. MTK7d.EPO must be downloaded manually. The program now accepts a --epo option to specify the EPO file.

[Pierke]

With respect to the EPO data and the strange block of data that ends the transfer;
I have 2 bytes different from MRU00's block.
But the 2 EPO download logs I have made so far only have 1 byte difference between them.

MRU00's block:
// some unknown data...
*it++ = 0x2C; *it++ = 0x01; *it++ = 0x00; *it++ = 0x00;
*it++ = 0x00; *it++ = 0x00; *it++ = 0x00; *it++ = 0x00;
*it++ = 0x0D; *it++ = 0x00; *it++ = 0x00; *it++ = 0x00;
*it++ = 0xF3; *it++ = 0x00; *it++ = 0x00; *it++ = 0x00;
*it++ = 0x00; *it++ = 0x00; *it++ = 0x00; *it++ = 0x00;
*it++ = 0xB0; *it++ = 0xEE; *it++ = 0x2E; *it++ = 0x02; // in my block 0xE2 = 0x35 respectively 0x36.
*it++ = 0xDC; *it++ = 0xAE; *it++ = 0x57; *it++ = 0x00; // in my block 0xDC = 0x74
*it++ = 0x00; *it++ = 0x00; *it++ = 0x00; *it++ = 0x00;
*it++ = 0x01; *it++ = 0x00; *it++ = 0x00; *it++ = 0x00;
*it++ = 0x00; *it++ = 0x00; *it++ = 0x00; *it++ = 0x00;
*it++ = 0x00; *it++ = 0x00; *it++ = 0x00; *it++ = 0x00;

I have the Conrad Multi NAV-3 with firmware 1.20.22_DLES0_00

[Happyfeet01]

which files must i use for updasting the AGPS Data from the watch? the Files from mediathek.com dont work
have this error

lars@Homebase-Linux ~/crane_gps_watch $ sudo crane_gps_watch_client --epo --verbose '/home/lars/Downloads/EPO(2).DAT' Autodetecting serial ports Opening serial port '/dev/ttyUSB0' Connected to watch on '/dev/ttyUSB0' watch begin p=Laufen l=German version='Ver1.20' firmware='1.20.26_RUNT0_00' timezone=28=0x1c profiles: Laufen Radfahren Wandern Segeln Benutzer 0 workouts read from watch downloading EPO data error: Failed to open EPO file Terminating

[ajfclark]

The original source I had for the MTK7dEPO file has ceased updating.

Using https://github.com/StevenMaude/armstrong I could get a file, but the byte count is wrong.

https://github.com/scrapper/postrunner/blob/93b5fc82a4d8ef9c6587abdd43b2e91ea829cfda/lib/postrunner/EPO_Downloader.rb has the format here: http://www.vis-plus.ee/pdf/SIM28_SIM68R_SIM68V_EPO-II_Protocol_V1.00.pdf

Which looks the same with 72 bytes per record instead of 60. Dumping them out, the last 12 bytes in each record look different to the old files, so I wrote a python script to chop those off:

#!/usr/bin/python3
import struct

inFile = open("EPO.BIN", "rb")
outFile = open("EPO-fixed.BIN", "wb")
for eposet in range(7*4):
	for sat in range(32):
		for byte in range(60):
			inData = struct.unpack("B", inFile.read(1))[0]
			outFile.write(struct.pack("B", inData))
		for byte in range(12):
			inData = struct.unpack("B", inFile.read(1))[0]
inFile.close()
outFile.close()

I think that's correct as a hex dump then looks like the old files.

[ajfclark]

I cleaned up my script and made it update with a timestamp, etc. f8cef28

ajfclark@f8cef28