New features:

ESP32

• NMEA TCP Service on port 2000 (AIrConnect compatible)

Raspberry Pi

• very first RC for SoftRF Raspberry Edition

Major improvements:

Common

• light increase of RF transmit power ¹
• more GDL90 and D1090 output options to choose from
• GDL90 ForeFlight Id message
• 866 MHz RF band for India
• minor "legacy" radio protocol compatibility improvements
• 2-color WebUI battery voltage value

¹ - valid for SX1276 radio and for certain world regions only

ESP32

• been built against of most recent ESP32 Arduino Core 1.0.1
• work around incorrect geoid separation value in GGA NMEA sentence of certain low-end GNSS chipsets
• GDL90 and D1090 Bluetooth output options are available
• watchdog reset timer (5 seconds)

Please, read commits history for more information.

Known issues

• To be compatible with most of EFB software on the market, MSL Ownship Geometric altitude is reported over GDL90 data link.
  This approach is a deviation from official GDL90 standard.
  SkyDemon EFB seems to be the only exception - it follows the specs and expects to receive an altitude, relative to WGS-84 ellipsoid.
  Those of SkyDemon users who fly in an areas where geoid separation value is significant (more than VDOP)
  should consider to terminate GDL90 and operate with NMEA TCP ("AirConnect") connection method instead.

• Web firmware update feature is inoperative on ESP32

Binary downloads and flashing instructions

WARNING

1. ESP8266 and ESP32. This upgrade will reset your SoftRF settings to factory default values. Please, follow these "backup and restore" procedures before doing the update
2. ESP32 only. "Web update" method is NOT applicable for this upgrade:
   • follow First-time firmware installation procedure instructions instead, and
   • make full flash ERASE prior to firmware write operation, and
   • disconnect any of I2C devices from ESP32's GPIO2 pad. See this ticket for details.

Prime MkII owners! I will reject any claims if you, by any reason, will fail to upgrade or fail to recover after un-successful update!
If you are not sure that you can manage the update successfully - think about to stay on RC5 or to buy a new board with pre-installed RC6.

Source code build instructions