| SIM900 modem usage | |
| =================== | |
| To enable SIM900 module support you need to put the following | |
| udev rule into appropriate file in /{etc,lib}/udev/rules.d: | |
| KERNEL=="gsmtty3", ENV{OFONO_DRIVER}="sim900" | |
| On the i-Tetra tracking device, the SIM900 is accessed | |
| via N_GSM mux device. We use ofono as SMS message | |
| service and incoming voice calls service, so we | |
| use /dev/gsmtty1 provided by N_GSM mux. |