rtl_tcp SDR for iOS and macOS & Hermes Lite 2

Discussion in 'Mac Ham Radio on macOS & iOS' started by N6YWU, Aug 5, 2020.

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  1. N6YWU

    N6YWU Ham Member QRZ Page

    As an exercise in learning to code radio DSP algorithms from textbook principles, I decided to write a complete SDR app for iOS in Swift. It's available from Apple's iOS App Store here:

    For the RTL-SDR, Airspy HF+, and SDRPlay RSP's, the app requires a radio tcp server such as rtl_tcp (or work-alike tcp server) running on a Mac or Raspberry Pi. I have some example tcp servers on GitHub here: https://github.com/hotpaw2

    Last year, I purchased a Hermes Lite 2 network-connected QRP SDR transceiver. 5 Watts. See:
    http://www.hermeslite.com and https://www.makerfabs.com/hermes-lite-2.html

    For the Hermes Lite 2 SDR transceiver, I currently am distributing an early beta test iOS version thru Apple's TestFlight app (which means it's free). At least a few QSOs (both CW and SSB) have been accomplished with the beta test app using iPhones and iPads as the remote HL2 console (no PC or Mac in the loop). The goal is to be able to do portable ops using only an HL2 (440 grams) and an iPhone. Email me if you have an OpenHPSDR radio (protocol 1 only) and want to help beta test. Contact info here: http://www.nicholson.com/rhn/

    After Apple released macOS Catalina with Catalyst support, I also built a macOS version of the rtl_tcp SDR app, available from Apple's Mac App Store here:
    This app has been tested on, and seems to work on Big Sur as well.

    The code is new (especially the Hermes Lite 2 SDR transceiver support), so it's very basic and not nearly as full featured as some of the more mature SDR applications out there, but the app is in current development and supported on the very newest Macs and iOS devices.


  2. KA9JLM

    KA9JLM Ham Member QRZ Page

    Cool Beans.

    Good Luck with your project.

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