We use many generations of Sierra Wireless modems. Now with the new EM9191 generation we can no longer find GPS via ttyUSB. With the previous generations (e.g. EM7565, 7455) there was always a ttyUSB interface for the NMEA stream. Why was this removed? Can this interface be activated via AT? Is t…

Does this help? [image] Getting GPS from EM9191 MC/EM Series you can see my test in linux to get NMEA frame: sudo apt-get install libmbim-utils make sure MBIM port is enabled in AT!USBCOMP? connect antenna to AUX antenna port power on the EM9191 with FW SWIX55C_03.09.06…

Do not help. It is QMI not a tty Interface.

Then I don’t see other method according to the response of AT!USBCOMP=? BTW, is your product based on linux?

yes, we use linux. our architecture use gpsd. that is the reason, why we need ttyUSB NMEA Stream.

can the gpsd get the NMEA data from QMI? can you create a virtual port and forward those NMEA stream obtained by QMI to that port?

Sounds like a theoretical solution. Do you have any experience or tools? Why did Sierra Wireless decide to eliminate this interface? It could have remained adjustable via USBCOMP or via the interface bit mask. Is it possible to offer the setting option again in the next firmware?

see if this helps to create virutal port: [image] Setup Virtual Serial Ports Using tty0tty in Linux – Sagun Pandey

maybe, I will check it. However, it sounds like a lot of work and testing to ensure that everything runs smoothly and reliably. what about my other questions? Is it possible to unlock the NMEA stream again via the bitmask or has the NMEA -ttyUSB stream been completely removed from the firmware?

i don’t quite see there is such plan

That is very bad. Then we will probably have to rely on other modules in the future, although we were very satisfied with the performance and stability of the SW modems.

EM9191 - NMEA GPS Stream - Can not find the ttyUSB Interface

IoT Modules MC/EM Series

jyijyi January 6, 2023, 1:21pm 2

Does this help?

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EM9191 - NMEA GPS Stream - Can not find the ttyUSB Interface

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