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WebSDR Backend
Run a DMR network server with a frontend, authentication, private and group calls and a parrot all in a single binary
The Direct Sampling SDR's GNURadio Module for SDDC(software digital down converter).
A 16QAM modulator built with a couple transistors, a 74HC86 XOR IC and an Arduino UNO
A software-defined Audio Frequency-Shift Keying modem designed for analog FM radios. Uses the device's default audio input and output.