AFSK demo modem rx/tx working

Projects Programming
1

I've been looking around for a long time for a working demo of an afsk modem that can receive and transmit in ax25 with an Arduino board and an external VHF/UHF radio.
Unfortunately I can't find it, the ones I've seen, some don't work, others are only in Tx, can you kindly advise me something?

2

Post a schematic showing what you tried and explain why it did not work. Include links to technical information on each of the hardware devices.

3

Take a look at GitHub - markqvist/MicroModem: Atmega328p-based 1200 Baud AFSK radio modem and/or GitHub - markqvist/OpenModem: Powerful AFSK modem platform

More at the author's home page.

4

thanks for your kind reply, if you can tell me which of the examples present in the Arduino libraries are working with an external radio maybe it will be done sooner than listing which ones are not.

5

thanks for your kind reply, I have already seen these examples but they work with their dedicated card which is not even available for purchase, what I needed is an example of a program that is capable of generating an audio signal in a pin and be able to decode a reception, obviously excluding the interface to the radio at the moment.

6

Such programs can be found in the Github links in post #3, will run on an ATmega328 (like that found in the Arduino Uno) and do not require special hardware other than a few ordinary components.

You will undoubtedly need to make some changes to run on your custom installation.

7

Thank you again, the problem is this :

"...While this project is based on Arduino hardware, it does not use the Arduino IDE. The project has been implemented in your normal C with makefile style, and uses libraries from the open source BertOS...."

for this reason i was looking for an arduino IDE based demo.

8

The relevant portions of the code will run on the Arduino IDE, with suitable modifications. I've done it myself, starting with afsk.c and afsk.h, found here:

You are extremely unlikely to find a complete demo package that will run on the Arduino IDE.

9

Thank You, I will take a look....

10

There is also this, intended for the Arduino IDE:

11

Thank you very much for your help.

12

Yes, this is exacly what i needed. thank You again.

13

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