This Python script converts a PNG image into an IQ file suitable for transmission over software-defined radio (SDR). When the generated IQ file is viewed on a waterfall plot, the transmitted image becomes visible.

1. Clone the repository:

   git clone https://github.com/ui-1/sdr-waterfall.git

2. Navigate to the project directory:

   cd sdr-waterfall

3. Install the dependencies listed in requirements.txt:

   pip install -r requirements.txt

Once the dependencies are installed, run img2iq.py as follows:

python img2iq.py image_in linetime samplerate iq_out

Use -h or --help to view detailed help:

usage: img2iq.py [-h] image_in linetime samplerate iq_out

Convert PNG images into IQ files, enabling visualization on a waterfall plot when broadcast over software-defined radio

positional arguments:
  image_in    Name of the input file, such as example.png
  linetime    How many seconds to repeat each line for, such as 0.01
  samplerate  Sampling rate, such as 48000
  iq_out      Name of the output IQ file, such as out.iq

optional arguments:
  -h, --help  show this help message and exit

Ensure that you are transmitting on a legal frequency. Unauthorized transmission on certain frequencies can interfere with licensed communications and may be subject to legal consequences. Always comply with local regulations and obtain appropriate licenses if necessary.

This project is licensed under the GNU General Public License v3.0 - see the LICENSE file for details.