HSDPA Modem on Raspberry Pi/Emteria 1.1.37
I'm trying to set up a USB modem for a kiosk device, with only partial success.
The modem is a generic Qualcomm device, which can be turned into a serial device with usb_modeswitch from the shell.
I can then directly issue the relevant AT commands from the shell to make it connect.
However, the version of pppd does not seem to be compatible with any of the guides online, and refuses to start a connection. The Emteria install doesn't appear to have a chat binary either.
Ideally I'd like to find/build a working pppd/chat/wvdial (whatever works) connection script that can be run at boot, but I'm not very well versed on which versions of these tools can be built to run in this environment.
Options like the infamous PPPWidget are off the table as (a) It requires Play Store and (b) It allows user interaction, both of which are unsuitable for a kiosk product.
Can someone advise on a correct build of these executables, or appropriate binaries? The existing discussions don't appear to reflect the current version of the tools in question.