For a good fork of SoftRF I can highly recommend https://github.com/moshe-braner/SoftRF it contains various fixes and new ideas that are beening used by different soaring clubs.

Features of this fork including...

Beyond Lyusupov's version 1.0:

• Can set aircraft ID for self, ID to ignore, and ID to follow
• Support 3-level collision alarms via buzzer
• Can configure two simultaneous NMEA output destinations
• Settable baud rate for serial output
• Estimates wind while circling, uses for collision prediction
• Corrected frequency hopping and time slots
• Airborne devices relay radio packets from landed aircraft
• Louder buzzer via 2-pin differential drive, or external
• Includes strobe-control logic within SoftRF
• Can adjust SoftRF settings within T-Echo (without an app)
• Modified version of SkyView
• SkyStrobe - a controller for a visibility strobe (and more)
• Documentation files.

• vMB09z: further compatibility improvements in transmissions and collision prediction
• Collision-danger traffic VOICE warnings! (not just beeps)
• Option to connect to ambient WiFi network instead of creating one
• Option to send data as TCP client instead of TCP server
• Specify server's IP address for TCP client, and choice of 2 ports
• Ability to use WiFi TCP & UDP NMEA outputs simultaneously
• These new WiFi options allow wireless output to XCvario

IMPORTANT: All modifications are provided only in the source code so you need to be familiar with Arduino to compile and flash it for your platform. You need to install Arduino IDE (v1.8 or later) and add the following two entries into the Additional Board Manager URLs:

• https://adafruit.github.io/arduino-board-index/package_adafruit_index.json
• https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json

For the T-Beam you need to select the ESP32 Dev Module board, for the T-Echo the Nordic nRF52840 DK board. For more details please read the related upstream WiKi section.

T-Beam modifications:

• u-blox GPS configuration:
  • enable GSA, GSV, VTG
  • enable GPS, GALILEO, BEIDOU and SBAS
  • enable NMEA extended
• default connection with Stratux: USB
• WiFi disabled to avoid conflicts with Stratux WiFi
• LEGACY traffic messages over serial connection are disabled (to relax data rate, Stratux receives LEGACY directly anyhow)

T-Echo modifications:

• L76K GPS configuration:
  • enable GSA, GSV, VTG
  • enable GPS, GLONASS and BEIDOU
  • NMEA output through USB
• default connection with Stratux: USB
• LK8EX1 and LEGACY traffic messages over serial connection are disabled (to relax data rate, Stratux receives LEGACY directly anyhow)

LIMITATIONS:

• GPS update rate is limited to 1 Hz in SoftRF, which is good enough for Stratux except when using GPS as a pseudo AHRS
• the L76K only supports the NMEA "strict" protocol version, therefore some extended satellite information (like elevation, azimut and numbering) is not provided for some satellites and therefore the GPS info page in Stratux is incomplete. Furthermore BEIDOU satellites are not displayed at all but are in fact used and counted for "in solution"
• currently only the T-Echo as a Baro source for Stratux is supported

Recommendations (be careful as you may render your device unusable):

• load OGN database for T-Beam: https://github.com/lyusupov/SoftRF/wiki/Badge-Edition.-Aircrafts-database
• modify SoftRF settings (e.g. Protocol or Aircraft type) through serial console commands: http://soaringweather.no-ip.info/SoftRF/settings.html

• Wearable
  • Badge Edition 

• Plug-and-Play
  • Dongle Edition
• Portable
  • Prime Mark II
• Classic 2.25 inch instrument
  • Standalone Edition
• Certified (CE/FCC)
  • Uni Edition
  • Mini Edition
  • Lego Edition 
  • Balkan Edition 
• Wireless 2.7 inch E-Ink display
  • SkyView EZ
• can receive ADS-B air traffic
  • 978 UAT
    • Uni Edition
  • 1090 ES
    • ES Edition 
  • 1090 ES and/or 978 UAT
    • Raspberry Edition
• can operate multiple protocols at the same time
  • Octave Concept 
• Weatherproof
  • Lego Edition  - IP67
• UAV add-on
  • UAV Edition
• Raspberry Pi friendly
  • Raspberry Edition
  • SkyView Pi
• for education purpose
  • Academy Edition
• made in EU
  • Balkan Edition 

¹ - it is necessary for a reader to distinguish the difference between statement "compatible" and statement "fully compatible".
     SoftRF implements only a reasonable minimum of the protocols specs. No "bells and whistles" so far.
² - FANET+ can not receive FLARM. However it is able to transmit it.
³ - valid for Prime Mark II , Dongle , Mini , Badge , Bracelet , Academy , Octave , Lego and Balkan Editions; valid for Standalone , UAV and Uni Editions with optional DIY SoftRF LoRa RF module
⁴ - Reception of traffic 'downlink' frames only. Valid for Uni Edition alone and for Standalone Edition with optional DIY SoftRF UAT module
⁵ - Reception of traffic 'downlink' frames only. Valid for ES Edition
⁶ - also known as "raw ADS-B"

Model(s)	Platform	First appearance	Status	Notes
1 Prime 2 Standalone 3 UAV 4 WebTop Serial	Espressif ESP8266	Q4 2015		Prime model is no longer supported - use Prime MkII instead.
1 Prime Mark II 2 Standalone + adapter 3 UAV 4 SkyView EZ 5 Flight Recorder 6 WebTop USB	Espressif ESP32 ESP32-S2 ESP32-S3	Q1 2018		Today's best platform
1 Raspberry Edition 2 SkyView Pi	Broadcom BCM283X (Raspberry Pi)	Q4 2018		Good for use together with RTL-SDR dongles to achieve additional 1090ES (and 978UAT) ADS-B air traffic reception.
1 UAT module 2 Uni	Texas Instruments CC1310 and CC13x2R	Q1 2019		1 Unique RF radio specs are useful for UAT978 ADS-B reception [ 1 , 2 , 3 ] ; 2 holds FCC/CE mark
1 Retro 2 Dongle 3 Balkan	STMicroelectronics STM32L073 and STM32WLE5	Q3 2019
Mini	Cypress PSoC 4100S	Q3 2020		1 good add-on candidate for modded Kobo e-Readers ; 2 holds FCC/CE mark
Badge	Nordic Semiconductor nRF52840	Q4 2020
ES	NXP Semiconductors LPC4320	Q2 2021		Unique RF radio specs are useful for 1090ES ADS-B reception [ 1 , 2 ]
1 Academy 2 USB2BT	Microchip (Atmel) SAM D21	Q4 2021		good for teaching students of air traffic proximity awareness
Octave	ASR Microelectronics ASR6601	Q1 2022		the best 'price per radio protocol' ratio on the market
Lego	Raspberry Pi Foundation RP2040	Q1 2022		holds FCC/CE mark

Radio	Model(s)	First appearance	Status	Notes
Nordic Semiconductor nRF905	1 Prime 2 Standalone 3 UAV	Q4 2015
Semtech SX1276	1 LoRa module 2 Prime Mark II 3 Raspberry Edition 4 Dongle 5 Academy	Q4 2017
Texas Instruments CC1310	UAT module	Q1 2019
Semtech SX1231	Retro	Q3 2019		operates through OGN driver with OGNTP protocol only
Semtech SX1262	1 Prime Mark II 2 Mini 3 Badge 4 Lego 5 Balkan	Q1 2020
Texas Instruments CC13x2R	Uni Edition	Q2 2020
Maxim Integrated MAX2837 and MAX5864	ES Edition	Q2 2021		Software Defined Radio

GNSS	Model(s)	First appearance	Status	Notes
Generic NMEA	Standalone	Q4 2016
U-blox 6/7/8	1 Prime Mark II 2 Retro 3 Uni 4 Lego 5 Balkan	Q2 2018
Hangzhou ZhongKe AT6558	1 Prime Mark II 2 Mini 3 Badge	Q2 2019
Sony CXD5603GF	1 Dongle	Q4 2019
MediaTek MT3339	1 Raspberry 2 Uni 3 Academy 4 Lego	Q3 2020
GOKE GK9501	Mini	Q3 2020

• SoftRF overview
  • Part 1 (PDF, December 2015)
  • Part 2 (PDF, March 2017)
• Badge Edition
  • Quick start
  • Screen pages
  • Bluetooth LE
  • Aircrafts database
  • Enclosure
  • Display care
  • Expansion module

• Prime Edition MkII

  • Quick start
  • Enclosure
  • Firmware update
    • USB
    • webUI
    • programming device

• Standalone Edition

  • Specifications
  • Shield
  • Modules
  • Assembly
  • Enclosure
  • ESP32 adapter

• ES Edition 

• Octave Concept 

• Uni Edition

  • Firmware installation
  • Enclosure

• Mini Edition

  • Firmware installation
  • Quick start
  • Enclosure

• Dongle Edition

  • Firmware installation
  • Quick start
  • Settings
  • Enclosure

• Lego Edition 

• Balkan Edition 

• Academy Edition

• UAV Edition

  • Bill of materials
  • Wiring and pin-out
  • Enclosure

• Raspberry Edition

• SkyView

  • EZ
    • Quick start
    • Settings
    • Enclosure
    • Dual boot
  • Pi

• WebTop USB 

• WebTop Serial

  • Quick start

• Flight Recorder

  • Quick start

• Software

  • Firmware
    • Release information
    • Binary
    • Settings
    • Update (Web method)
    • Source

• Extras

  • Long range (LoRa) RF module
    • Frequency deviation
  • Protocols
    • UAT
    • OGNTP
    • P3I Open (PilotAware)
    • FANET (Skytraxx)
  • Garmin GDL90 datalink
    • SkyDemon
    • Avare
    • ForeFlight
  • Integration with airborne (Stratux, PilotAware,...) and groundstation (FlightRadar24, FlightAware,...) ADS-B receivers
  • Combined use of multiple SoftRF units

• Archive

  • Prime Edition
    • Bill of materials
    • Wiring
    • Enclosure
  • Retro Edition
  • Applications
    • Emulator

• Badge Edition

• Prime Edition Mark II

• ES Edition

• SoftRF Tool

• Standalone Edition

• Uni Edition

• Dongle Edition

• Mini Edition

• SkyView EZ

• Lego Edition 

• Balkan Edition 

• Academy Edition

• Octave Concept

• UAV appliance

• Raspberry Edition

• Flight Recorder