On a RUT955, at least, this is possible. EITHER developing some custom scripts for org system, OR (recommended) to build custom firmware, based on original openwrt. The advantage here simply is, that it is completely "open source", which is not valid for Teltonikas dialect of openwrt.
The RUT230 is also supported running official openwrt; however, I have no personal experience about its reliability. The RUT955 is stable for industrial app, when running official openwrt. Used it in large fleet of IoT-devices.