MiYooSDR 0.3.0 (experimental)

Experimental. MiYooSDR 0.3.0: a receive-only 2.4 GHz spectrum analyzer and waterfall for the Miyoo Mini Plus, built from the handheld's own RTL8188FU Wi-Fi chip. No SDR dongle or extra hardware.

New in 0.3.0

• What's at the cursor: the side panel names the Bluetooth LE channel (the advertising channels 37, 38 and 39 in yellow, where beacons, phones and most BLE remotes transmit), the Wi-Fi channel and the Zigbee channel under the cursor. Yellow ticks mark the three advertising channels on the spectrum.
• Burst counter: counts transmissions at the cursor (8 dB over the background), with the time since the last one, the typical spacing and the last one's length. Park the cursor on a remote or sensor to see how often it sends. B clears it.
• Remembers your view: palette, view style, lower panel, enhance, max hold, zoom and cursor are restored on the next start (App/MiYooSDR/settings.txt).
• PNG screenshots: START saves App/MiYooSDR/shots/sdr-<date>-<time>.png, which opens on any phone or PC and no longer overwrites the last one.
• Fix: after reviewing a zoomed recording, live sweeps now go back to the view you had (they used to continue with the recording's view and no channel).
• The help line fits the screen again.

Requirements

• A Miyoo Mini Plus (the plain Mini has no Wi-Fi chip and will not work).
• OnionOS with its stock 8188fu driver.

Install

Download miyoosdr-0.3.0.zip, extract to the root of your SD card (it lands as App/MiYooSDR), and launch MiYooSDR from Onion's Apps list. Wi-Fi goes offline while it runs and returns a few seconds after you quit. Levels are uncalibrated; it is receive-only and cannot decode signals. Controls are in the README.

SHA-256 661eb89a168fa4c170a54d76c803dfde6f8e31d99205b399262369495e4ff201