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Quectel in the documentation for other Qualcomm-based modem explains in details DPO (Dynamic Power Optimization), that is enabled on EG25-G currently. One of requirements for DPO is, that XTRA almanac must be less that 3.5 days old. [1] Additionally SIMCOM says, that information predicted by XTRA is very accurate within 24 hours, but its effectiveness decreases over time. [2] Xtra3 files are available for 1 day (xtra3grc_24h.bin), 3 days (xtra3grc_72h.bin) and 7 days (xtra3grc.bin). Currently 7 days variant is used. Based on recommendations from Quectel and SIMCOM to slightly improve GNSS performance switch default configuration to 24h XTRA variant. 1. https://sixfab.com/wp-content/uploads/2018/09/Quectel_UC20_GNSS_AT_Commands_Manual_V1.1.pdf 2. https://cdn.geekfactory.mx/sim7000g/SIM7000%20Series_GNSS_Application%20Note_V1.03.pdf
eg25-manager - Quectel EG25 management daemon
eg25-manager is a daemon for managing the Quectel EG25 modem found on the
Pine64 PinePhone.
It implements the following features:
- cleanly power on/off the modem
- configure/check essential parameters (such as the audio format) on startup
- monitor the modem state through ModemManager
- put the modem in low-power mode when suspending the system, and restore it back to normal behavior when resuming
- monitor the modem state on resume and recover it if needed
Dependencies
eg25-manager requires the following development libraries:
- libglib2.0-dev
- libgpiod-dev (>= 2.0)
- libmm-glib-dev
Building
eg25-manager uses meson as its build system. Building and installing
eg25-manager is as simple as running the following commands:
$ meson ../eg25-build
$ ninja -C ../eg25-build
# ninja -C ../eg25-build install
Configuration
eg25-manager uses device-specific configuration files, named after the
device-tree compatible field. These files are installed to
/usr/share/eg25-manager. They can be copied to /etc/eg25-manager then
modified, that way they won't be overwritten during an upgrade.
Running
eg25-manager is usually run as a systemd service, but can also be
manually started from the command-line (requires root privileges):
# eg25manager
License
eg25-manager is licensed under the GPLv3+.