Update: For an unknown kind of reason, it worked out of sudden!
My setup and instruction:
-After installing the driver from:
https://www.u-blox.com/en/ubx-viewer/view/qud.win_.1.1_installer_10057.4.zip?url=https%3A%2F%2Fwww.u-blox.com%2Fsites%2Fdefault%2Ffiles%2Fqud.win_.1.1_installer_10057.4.zip
- Solder the USB Cable without a bridge mentioned in #11 but WITH USB Black to GND Black (5) as in #1 but without a switch on PIN 6
- Install EasyFlash 2.10 with the upgrade file in the same dir
- The common SerialPasstrough Sketch from MKRNB examples/tools loaded
- Check with command ATI9
Response:
09:42:15.148 -> ATI9
09:42:15.148 -> L0.0.00.00.05.08,A.02.04
09:42:15.148 ->
09:42:15.148 -> OK
-Then i unplugged the MKR USB and plugged into a power only USB (Probably superstition)
- Then i plug the soldered USB into a Windows PC. The Qualcomm Modem 90B2 should apear in device manager.
- Start EasyFlash as Admin with "Sara-R4, USB, nothing"
- After a scary long procedure -> SUCCESS!
- Unplug the soldered USB from the PC
- Unplug the MKR USB from the power USB back to the arduino PC, check with ATI9 and hopefully see:
11:18:22.144 -> ATI9
11:18:22.144 -> L0.0.00.00.05.12,A.02.19
11:18:22.144 ->
11:18:22.144 -> OK
in nomine spiritus sancti..Hallelujah!
PPS: The holy ghost left me this morning...same setup, another MKR1500, the old problems...after injecting sequence the modem disapears for unknown reasons in windows os. No logs, no nothing..
PPPS: After reinstalling the Qualcomm driver i had another lucky shot...
PPPPS: Next MKR1500: USB soldered, SerialPasstrough loaded, Modem was not even answering in Windows Diagnosis, EasyFlash worked at first attempt! Really easy this time...
Check the solder joint well with a loupe!