Online sdr based morse decoder software#
Online sdr based morse decoder code#
Online sdr based morse decoder trial#

Online sdr based morse decoder code#

Where do I set the code to use 3.6 instead of T4. However, I see from the code that several errors came up that did not show on the earlier version and example is DrawFloat which states that the member does not exist. I uncommented this line #define HARDWARE_DD4WH. I now downloaded the version available but did not realise that it has been updated and this showed a number of errors at compile time which I corrected mostly library etc. I upgraded Arduino and that broke all the earlier work done on the libraries and so I started afresh.

Online sdr based morse decoder trial#

I made the changes necessary I the library files based on the instructions and the screen displayed the necessary information and with trial and error and studying the code, I worked out each of the controls. No SDR was connected at the time, but the idea was to get a more general feel of the operation and the layout of menu items. The plan then was to display the screen and then work out the controls and their operation. I have been playing around with the code of the version earlier to this around Oct 3. I plan to use my own SDR that I built, the SDR has a si5351 onboard.

The relevant Audio shield has not been connected yet. I have downloaded the most current version (2019_10_08). the IIR filters in the FM receive path have to be substituted by phase linear FIR filters to enable better stereo diversity. There is plenty of room for optimization, eg. Use the compile time switch in the first script lines before compiling.

Online sdr based morse decoder software#

The software is now usable with the Teensy 4.0 OR the Teensy 3.6. * the antenna is a 2 x 0.75m wire connected directly to the quadrature sampling detector board * one cheap joystick containing the functionality of five pushbuttons * quadrature sampling detector board containing: Processor load is now about 61% (in the video it is 44%, but I changed a bunch of things).įor testing, I built up a new machine on a perf board with a common ground plane using:

Here, it demodulates FM stereo at 256ksps sample rate using the processor intense atan2 function with the double precision FPU of the Teensy 4.0. * of course, the human brain is much much better than a machine in decoding morse code signals buried in noise: so, do not expect miracles from this simple decoder * there is an automatic adjustment called ATC, but I have not yet experimented much with that This will be made flexible and adjustable for the user in the next version * the tone detection uses a narrow bandpass filter (Goertzel) at 700Hz, so your signal MUST be tuned at 700Hz above or below the tune frequency (depending on whether you use USB or LSB demodulation).

* the threshhold for detecting the Morse pulses (CW thresh) has to be manually adjusted according to the band noise, it has to be well above the band noise and well below the signal strength of the Morse signal This is a first version, so there is some caution necessary: It is the same version as available for the UHSDR software. We have implemented the decoder version supplied by Loftur (thanks a lot for putting that into the public domain! ) based on an algorithm from a Master thesis from 1973. Morse code (CW) decoding is now available in the Teensy Convolution SDR.