WeatherStation-send-data

Generate and transmit spoofed 433 MHz OOK signals that impersonate a Newentor weather station sensor using a HackRF One.

The script was released along with a Blog post on RF hacking, available at:

• https://medium.com/@kulkan-security/reversing-a-433-mhz-weather-sensor-from-rf-capture-to-payload-forgery-1c0269d8722a

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Requirements

• HackRF One (or compatible SDR transmitter)
• Python 3.8+
• numpy

pip install numpy

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Usage

python3 generate_rf_payload.py <temp_fahrenheit> <humidity> [options]

Arguments

Argument	Description
temp_f	Temperature in Fahrenheit (e.g. 72.5)
humidity	Relative humidity 0–100 (integer)
--channel, -c	Sensor channel 1–3 (default: 1)
--output, -o	Output file path (default: generated_433.raw)
--repeat, -r	Number of frame repetitions (default: 30)

Example

# Generate a signal: 72.5°F, 45% humidity, channel 1
python3 generate_rf_payload.py 72.5 45 --channel 1 --output signal.raw

# Transmit with HackRF
hackrf_transfer -t signal.raw -f 433937200 -s 2000000 -x 47 -a 1 -R

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Related

• rtl_433 - decoding 433 MHz sensor protocols
• HackRF One - SDR platform used for transmission