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Powerful AFSK modem platform
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Dmitriy Logachov 48ef9a625f Fixed a bug in the initialization of the bme280 module, which led to a change in PC0 to output instead of input. As a result, the ADC stopped working. This manifested itself as inoperability of packet decoding. 2021-01-17 18:20:46 +05:00
documentation Added hardware documentation 2020-04-30 18:23:14 +02:00
hardware Fixed a bug in the initialization of the bme280 module, which led to a change in PC0 to output instead of input. As a result, the ADC stopped working. This manifested itself as inoperability of packet decoding. 2021-01-17 18:20:46 +05:00
images Changed default preamble 2018-03-28 22:17:53 +02:00
precompiled Updated precompiled binaries 2020-06-01 21:30:48 +02:00
protocol Added the ability to invert SD_DETECT for cardholders with a normally open contact to determine the presence of a card. 2021-01-13 15:10:59 +05:00
util Added the ability to invert SD_DETECT for cardholders with a normally open contact to determine the presence of a card. 2021-01-13 15:10:59 +05:00
.gitignore Configuration and audio level monitoring implemented 2019-02-08 15:48:13 +01:00
LICENSE Changed default preamble 2018-03-28 22:17:53 +02:00
Makefile Added BME280 driver 2020-10-23 13:53:34 +02:00
README.md Update README.md 2020-06-11 09:41:11 +02:00
device.h Added BME280 driver 2020-10-23 13:53:34 +02:00
flash Serial interrupt 2020-05-28 18:18:35 +02:00
main.c Added BME280 driver 2020-10-23 13:53:34 +02:00

README.md

Open Modem Firmware

Open Modem Firmware is an open source firmware implementation of a AFSK modem supporting 300, 1200 and 2400 baud operation, suitable for communication over a wide variety of analogue mediums, both radio and wired. The firmware is designed for and compatible with unsigned.io's OpenModem, but can be used on any similar build.

Complete modems are available from the unsigned.io shop, or can be build from scratch by referring to the schematics and documentation on the OpenModem page

A few highlights

  • 300, 1200 and 2400 baud operation
  • Full KISS TNC compatibility
  • Secure in-modem AES-128 encryption
  • SD card support
  • Packet logging in PCAP format (WireShark compatible)
  • Digitally adjustable input and output gain control
  • Easy to use graphical config utility
  • Supports standard GPS and bluetooth modules
  • Supports large packets, 576 byte MTU
  • Very large in-modem packet queue

Usage

Please refer to the manual and instructions posted at the OpenModem page. The default serial connection settings are 115200 baud, 8N1. For configuring the modem, please see the OpenModem Config Utility.