Hi Domi, Actually, you are correct, my shields do look like they are "press fit" onto a cage. I'm hoping that I can find a UART on the test points, though, before I start pulling the shields off.
I did some initial probing with the scope, and only found constant 1v8 on some, and constant ground on others. Nothing that suggested UART activity, unfortunately. That said, I was not "rebooting" between each point, so the device may have settled down by the time I tested the TX pin! I'll be grabbing a foot switch, so I can reset the modem while probing each point, hopefully that will give better results! I'm happy to try your firmware, to see if I can get ADB working. How would I check if it can be accessed/enabled? As mentioned, I only get the 5 ttyUSB devices (and get no response to an AT command on any of them!) My end goal, though, is to have a completely standalone Linux computer, accessible from the Internet, that can present a variety of different USB gadget profiles to its host. So, while ADB would assist in probing the capabilities of the built-in firmware, it would be superfluous in the long run. Rogan On Tue, Oct 30, 2018 at 11:25 AM Tomcsányi Domonkos <[email protected]> wrote: > > Hello Rogan, > > I'm the author of the Wiki page about the stick. > https://osmocom.org/projects/quectel-modems/wiki/D-Link_DWM-222_stick > I am really glad to see some interest in the device. > > Do you have ADB access, or that has already been disabled? > You could try to flash a new firmware on the device, using the provided > flasher application (Windows only). Would you be open to run the firmware > updater tool with my modified rootfs, that would enable ADB for the stick? > I think the A1 firmware is compatible, but I cannot say for sure. All I know > is that my stick's LED doesn't properly do status indication since I run the > upgrade, but otherwise it functions as a modem. > I'd be happy to co-operate on this project, because I think it is quite > interesting. > > About the shields: as it could be seen on the pictures I just lifted the > metal with a screewdriver to reveal the chips. The A2 has those maybe > soldered on? > > Also I just noticed D-Link has released 2 new firmwares since I last checked. > I will see if I can somehow update my dongle from the current semi-broken > state. > > Cheers, > Domi > > > > 2018. okt. 30. dátummal, 9:43 időpontban Rogan Dawes <[email protected]> > írta: > > Hi folks, > > I have purchased a DLink DWM-222 with the intention of exploring the > Linux OS running inside it, and if possible, compiling some additional > USB gadgets to use with it. > > FWIW, the USB ID's are 2001:ac01 before modeswitch, and 2001:7e3d > after switching. > > It creates ttyUSB[0-4] when switched, and the VID:PID added to the > option driver. > > I was wondering if there had been any further developments in the > exploration of the A1 hardware or firmware, in terms of gaining a > shell on the device at all without soldering? > > Some initial probing has shown some 1.8v signals on some of the test > points, so I will check those with a scope while booting to see if I > can identify some waveforms, hopefully indicating a UART. I do have a > FTDI UART with a voltage reference, so I am fairly confident that I > can access those signals without damaging the device once identified. > > Unfortunately, the updated hardware has complete shields over the > interesting bits, so I cannot identify chips, etc. I have also not > been able to find firmware for the A2, the only firmware I could find > was at ftp://ftp.d-link.co.za/DWM/dwm222/Firmware/, marked as A1. I'll > check to see if they are compatible. And of course, will be copying > the driver software from the embedded CDROM. > > Regards, > > Rogan > _______________________________________________ > qc-linux-modems mailing list > [email protected] > https://lists.osmocom.org/mailman/listinfo/qc-linux-modems > > _______________________________________________ qc-linux-modems mailing list [email protected] https://lists.osmocom.org/mailman/listinfo/qc-linux-modems
