Major improvements:

Common

• "track_online" and "stealth" options are in Settings menu
• multiple choice of traffic alarm triggers (NMEA only)
• 'About' WebUI page
• 470 MHz RF band for China (with proper RF hardware)
• firmware web-update progress indicator
• "balloon" aircraft type is available in WebUI settings
• fix for wrong checksum of pressure altitude NMEA sentence ( see issue #24 )
• correction of altitude reported over "legacy" RF protocol
• MSL altitude adjustment for old or non-branded GNSS modules
• fix for ghosting traffic at your aircraft's position (seen in XCSoar over NMEA data link)

NodeMCU

• been built against most recent ESP8266 Arduino Core 2.4.2

ESP32

• been built against very first stable release of ESP32 Arduino Core 1.0.0
• valid Class Of Device (COD) of built-in Bluetooth (SPP only)
• improved battery voltage meter
• fix for LED ring flickering issue
• Prime Mark II (TTGO T-Beam) specific:
  • GNSS module ID,
  • GNSS UBX boot-time configuration,
  • battery voltage value,
  • status LED,
  • I2C barometric pressure sensor (optional),
  • I2C 0.96" OLED display (optional)

Please, read commits history for more information.

Known issues

• due to Espressif ESP32 chip design limitations, Bluetooth and Wi-Fi components share some RF hardware resources. In SoftRF firmware priority is given to Bluetooth. So when Bluetooth SPP connection is active - SoftRF's Wi-Fi Access Point may disappear. It is Ok - it will come up again when the Bluetooth connection is over.
  If you need rock solid operation of both Bluetooth and Wi-Fi AP at the same time - it is recommended to wire a hardware Bluetooth module (HC-05 or HM-10).

Binary downloads and flashing instructions

Source code build instructions