Transmit data with sound. Includes binaries for soundcards and .wav files.

Quiet for Android - TCP over sound

An ESP8266 based RS232 <-> WiFi modem with Hayes AT style commands and LED indicators

LoRa Basics Modem LoRaWAN stack

MicroPython implementation on Ai-Thinker GPRS module A9 (RDA8955)

ESP32 / esp-idf LTE UART modem library for sim7600 with cmux support

A Pico W based RS232 <-> WiFi modem with Hayes AT style commands and LED indicators

A modem/TNC to generate the AFSK audio tones for sending APRS messages using a Raspberry Pi Pico/Pico2

A code skeleton of Samsung's Shannon S5000 baseband modem.

A small utility to decode the nv item 00028874

Mobile for raspberry, support LongSung U8300C,9300C, Huawei ME909s, NL660, SIMCOM, N720 and etc

A code skeleton of Samsung's Shannon5123 5G baseband modem.

Demonstration application for LoRa Edge tracker reference design - compatible with LoRa Basics Modem-E

Control MBIM-compatible mobile broadband modems

Terminal Node Controller and APRS Tracker Project

A tiny Bell 103 (300 baud FSK) softmodem

modemu2k is a fork of modemu, a telnet client with a modem-like user interface

noisy Zimodem

Tools and firmware for the Si10XX based UAV/UGV telemetry modems