Raspberry Pi & PiTFT-based RTL-SDR frequency scanning and display tool. See installation and usage instructions in the guide at: https://learn.adafruit.com/freq-show-raspberry-pi-rtl-sdr-scanner/overview
Forked from adafruit/FreqShow
Feature added:
Peak hold Peak hold line Offset
Note: Default offset value based on my RTL-SDR dongle, need calibration on other SDR device
My raspberry pi run on HDMI touch screen, so default using fb0 as output. Use fb1 instead if using adafruit screen(untested)