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Matthias Meisser digi_c at arcor.deHi list, sorry for abusing the list for a somewhat support request but unfortunatly I didn't got answers in the IRC. I'm interested to use BB for some experiments on mapping GSM cells (opencellid.org and similar). So I finally got cell_log to work and my general BB setup works fine here on my laptop. But even with a working GPS, I don't get any positions in the osmocom logfile or the resulting kml by gsmap. Here is what I do: I pair my Bluetooth GPS via sudo rfcomm connect /dev/rfcomm0 00:AA:BB:CC:DD:EE I test it via sudo cat /dev/rfcomm0 and it prints the usual NMEA stuff I connect my mobile C123 and fire up osmocon with L23: sudo ./osmocon -p /dev/ttyUSB0 -m c123xor '/home/matthias/opencellid/osmocom-bb/src/target/firmware/board/compal_e88/layer1.compalram.bin' After upload I start cell_log sudo ./cell_log -f /dev/rfcomm0 which looks ok: <0010> app_cell_log.c:216 Using GPS serial device /dev/rfcomm0 Failed to connect to '/tmp/osmocom_sap'. Failed during sap_open(), no SIM reader <000e> cell_log.c:804 Scanner initialized Mobile initialized, please start phone now! <000e> cell_log.c:368 Measure from 0 to 124 <000e> cell_log.c:368 Measure from 512 to 885 <000e> cell_log.c:368 Measure from 955 to 1023 <000e> cell_log.c:359 Measurement done <000e> cell_log.c:341 Sync ARFCN 17 (rxlev -59, 421 syncs left) <000e> cell_log.c:341 Sync ARFCN 675 (rxlev -62, 420 syncs left) <000e> cell_log.c:341 Sync ARFCN 85 (rxlev -65, 419 syncs left) <000e> cell_log.c:191 Cell: ARFCN=85 MCC=262 MNC=01 (Germany, T-Mobile) <000e> cell_log.c:341 Sync ARFCN 47 (rxlev -66, 418 syncs left) <000e> cell_log.c:191 Cell: ARFCN=47 MCC=262 MNC=01 (Germany, T-Mobile) <000e> cell_log.c:341 Sync ARFCN 6 (rxlev -73, 417 syncs left) <000e> cell_log.c:191 Cell: ARFCN=6 MCC=262 MNC=02 (Germany, Vodafone) <000e> cell_log.c:341 Sync ARFCN 75 (rxlev -73, 416 syncs left) <000e> cell_log.c:191 Cell: ARFCN=75 MCC=262 MNC=02 (Germany, Vodafone) <000e> cell_log.c:341 Sync ARFCN 671 (rxlev -73, 415 syncs left) <000e> cell_log.c:341 Sync ARFCN 22 (rxlev -75, 414 syncs left) <000e> cell_log.c:341 Sync ARFCN 25 (rxlev -75, 413 syncs left) <000e> cell_log.c:341 Sync ARFCN 20 (rxlev -77, 412 syncs left) <000e> cell_log.c:341 Sync ARFCN 90 (rxlev -78, 411 syncs left) But it doesn't write any positions at the logfile nor shows that it got a working GPS position. Only at a few starts I saw this line coming up: <000e> cell_log.c:804 Scanner initialized Mobile initialized, please start phone now! NMEA checksum error So I tried to set the baud rate but this message doesn't seem to be reproducable. Is there anything else I can do, or might it be some kind of software bug for my specific setup? cya, Matthias