Techcoderadio

Python, RTL-SDR, numpy This is modified version based on rtl-sdr-close-call-monitor  https://github.com/nootedandrooted/rtl-sdr-close-call-monitor It scans tetra uplink european frequencies. import sys import time import numpy as np from rtlsdr import RtlSdr sdr = RtlSdr() sr = 2.4e6 shift = 1.2e6 start_freq = 380.0125e6 end_freq = 0 freq = 381.2125e6 sdr.sample_rate = sr  # Hz sdr.freq_correction = 1  # PPM sdr.gain = 30  # dB num_samples = 2**16 squelch_level = -30 n = 0 while True:     gain_question = str(input("Do you want to use the default gain? (30dB) (y/n): "))     if gain_question == 'y':         print("Using the default gain (30 dB)")         break     elif gain_question == 'n':         gain_custom = int(input("Please enter the gain (in dB): "))         sdr.gain = gain_custom         break     else:      ...

Detect It Easy   De4dot   dotPeek export to VS project. VS 2026 converted successfully to .NET 4.8 level. Weird and obfuscated source files but also a dir in project that contains clean code files. Changed configuration to x86.   Build failed with many C# 7.3 nullable disable errors. added to .csproj     <Nullable>Enable</Nullable>     <LangVersion>preview</LangVersion> still one CSC nullable disable error c# 7.3 changed to wrong configuration x86 -> x64 and back to x86 then clean and successful build.   

Firmware updater exe : DetectItEasy  De4dot: VS Code ILSpy decompiled cleaned code  dotPeek created VS solution   Firmware ROM binary file inside VS solution, DetectItEasy: CPU is probably R8C. Some Ghidra R8 processor modules exists: https://github.com/silverchris/m16c