OsmocomBB is an Open Source GSM Baseband software implementation. By using the sofware on a compatible phone (e.g. Motorola C118), you are able to make and receive phone calls, send and receive SMS, etc. based on Free Software only. Hardware PL2303HX USB Serial To RS232 TTL Chip 2.5 mm audio jack Motorola C118 (E88) This is a typical pin-out of a 2.5 mm audio jack: L (Left Signal) Tip 1 Green R (Right Signal) Ring 2 Red GND (Ground) Sleeve 3 Bare Copper You need to soldier the 2.5mm audio jack to the USB Serial To RS232 TTL Chip, whereas TxD is at the tip of the plug RxD is at the middle contact GND is the outer contact Software Connect the phone to your PC and check if it is being recognized. dmesg | grep tty user@user:~$ dmesg | grep tty [ 0.000000] console [tty0] enabled [ 6522.143379] usb 3-2: pl2303 converter now attached to ttyUSB0 To make sure everything is working, install cu and c
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