Audio modem developed as an project assignment for Computer networking course. This program is capable of transmitting strings between two computers using a simple headset or an audio cable.
##Technical details Here's a simple diagram describing the radio stack from the transmitter's perspective.
+------------------+
| Sync. invocation +-+
+------------------+ |
+----------+ +----------------+ | +-----------------+
| Data +--+-> 4B5B encoding +----->01010001001001010|
+----------+ | +----------------+ | +--------+--------+
+----------+ | +----------------+ | |
| Address +--+ | Trailing zeros +---+ |
+----------+ +----------------+ +--------v---------+
| Freq. modulation |
+--------+---------+
|
+------v-------+
| Audio output |
+--------------+
##Instructions
- Install all python dependencies with
pip install -r requirements.txt - Run receiver.py and type in a 2-byte host address (eg. 0x0001)
############################
# RECEIVER #
############################
Type host address (eg. 0xABCD): 0x0001
- In another terminal session, run play.py and type in a 2-byte host address (eg. 0x0002)
############################
# PLAYER #
############################
Type host address (eg. 0xABCD): 0x0002
- Now you're able to type in the receiver's address as well as the message to be sent.
Type dest address (eg. 0xABCD): 0x0001
Type message (eg. Hello World!): Test test test
------BINARY OUTPUT START-------
10101010101010101010101010101010101010101010101010101010101010100000011110111101111010100111101111011110010010101101010011100101101111101010111101010101001111001111010100111001011011111010101111010101010011110011110101001110010110111110101011110101010101010110101110010111001110101111111010000000000000000
------BINARY OUTPUT END-------