[maemo-developers] [maemo-developers] USB GPS receiver using pl2303

From: Hugh Warrington hjmw2 at cam.ac.uk
Date: Sun Aug 27 02:00:27 EEST 2006
Hi there.

I've been trying to connect a USB GPS receiver (Haicom HI-204III-USB
http://www.haicom.com.tw/gps204III_USB.shtml) to my N770. I've made a
USB power injector according to
http://thoughtfix.blogspot.com/2006/01/usb-power-injector-2.html .

When I connect the N770 to the injector I have created, I get

[ 5467.396606] USB cable connected

in dmesg. I am running a self compiled kernel with the options


When I connect the GPS to the other port of the USB power injector, I
get this in dmesg:

[ 5475.992858] usb 1-1: new full speed USB device using ohci and address
[ 5476.315887] usb 1-1: device v067b p2303 is not supported
[ 5476.317901] usb 1-1: configuration #1 chosen from 1 choice
[ 5476.320312] pl2303 1-1:1.0: pl2303 converter detected
[ 5476.320953] usb 1-1: pl2303 converter now attached to ttyUSB0

There has been mention of successful use of the pl2303 USB-to-serial
adaptor on this list before (http://www.archivesat.com/post338647.htm).
Some others also used the pl2303 with success:
http://www.hcilab.org/projects/nokia770/nokia770.htm (see the photo of
very similar dmesg output, including the 'not supported' line).

However, I get nothing from

cat /dev/ttyUSB0

Similarly, gpsd finds no device attached. In contrast, on my laptop I

usb 2-1: new full speed USB device using uhci_hcd and address 6
usb 2-1: configuration #1 chosen from 1 choice
pl2303 2-1:1.0: pl2303 converter detected
usb 2-1: pl2303 converter now attached to ttyUSB0

I used the same kernel options as on the N770. I get from
cat /dev/ttyUSB0 the expected reports each second:








Can anybody suggest anything?

Hugh Warrington

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