- Increase default telemetry packet size (9 -> 17 bytes)
- Add bigpacket mode (uses 33 byte packets both directions)

- Revise defaults for type 5 (default to PPM+RSSI)
- Fully compatible release no need to update RX unless above is desired

- Add mode switch support for deluxeTX v1 (connect to GND,SCL,SDA)
- Add 'static' channel inputs

- Add mode switch support for flytron/orangeRX HW (version 3.8.3)

- Fix bug in channel mapping code. Kudos to acc007@RCGroups

- TX: Fix profile to default to 1

- TX: Enable profile selection by 'mode switch'
- TX: Enable using modeswitch as channel input
- TX: Allow using modeswitch as 'powerboost' trigger
- TX: button randomize now does a RSSI scan an uses low noise channels
- RX: Failsafes can be set/locked per channel
- RX: Beacon can now be activated (during silent interval) by transmission on beacon channel

- Fix Sxx outputs to work without telemetry being enabled and obey failsafe
- Make Sxx outputs to work with different threshold levels, this allows one channel to be used to drive 3 Sxx outputs
- Add support for Broversity RX (HW_TYPE 9)
- Add diversity support (longer preamble)

- Updated binaries with disabled CLI on 32u4 hardware

- Fix regression on 16ch operation (introduced in 3.7.1)
- Add support for Flytron M1 TX module (HW type 0)
- Experimental: add support for 'alternate' power mode
- Fix output of SUMD, Spektrum and SBUS

- Support TX module (type 2) as RX
- Single tone/power beacon mode

- Ability to inject RSSI/LinkQ as two channels on PPM/PWM
- Fix high frequency PWM RSSI frequency (broken in 3.7)
- Reduce jitter on OrangeRX and Flytron TX units

- Configurable minimum channel count for PPM input
- Improved composite RSSI Q(0-126) RSSI (128-255)
- MiniRX support
- TX side channel mapping

- Fix for usage of TX/RX pins as channel outputs

- Support for Deluxe JR TX
- Required protocol changes to support signal monitor

- Bugfix for problematic connecting through configurator

- Decreased startup time of the TX firmware
- Micro PPM bugfix

- Improved EEPROM robustness
- Bugfix for rare TX lockup with telemetry enabled

- Enable watchdog when possible (needs optiboot on atmega328P)
- Loosen spektrum frame input validation
- Failsafe values can now be accesed via configurator

- Fixed LLIND and S* output modes

- SUMD support on both TX and RX
- SBUS support on both TX and RX (needs external inverter)
- channel as switch support (S1-S16 in configurator)
- LLIND (logic level linkloss indication)

- Diversity support on RX (two RX connected via I2C)

- Allow 'Spektrum satellite' output on RX

- Fixed binaries (3.5 had compiler problems)

- Support for profiles on TX
- Clearer RSSI implementation
- (0-80% == quality, 80-100% == RSSI (while qulity is 100%)
- Modules print firmware version and hardware type upon startup

- Removed MicroPPM autodetect
- Enabled noisefilter on PPM input
- Allow PPM polarity selection

- RSSI injection fixes
- PPM disable via failsafe fixes

- Fix spurious failsafe activation

- RSSI bugfixes

- Failsafe bugfixes

New Features:
- support for DTFUHF/HawkEye 6ch RX
- support FrSky smartPort telemetry (Taranis, only RSSI & 2x analog, no hubdata yet)
- delay for failsafe/PWMstop/PPMstop can now be set separately
- improved RSSI output
- allow PWM/PPM enabling before radiolink (loads failsafes)
- allow muting TX beeper on telemetry loss
- set serial baudrate in bind mode, this allows entering TX menu with e.g. 9600 bauds (bluetooth etc.)
- EXPERIMENTAL: added datarates 57k6 and 125k, use with care
Fixes:
- shortened 'jumpper probe' time on outputs 1-4, fixes ESCs refusing to arm
- enable channel id matchingm prevents syncing to wrong hop position
- use higher power on bind, fixes bind problems with some 1W units
Behind scenes improvements:
- RX type/config information is now transferred during RXconf, this removes the need for TX to know details of every TX type.

- PSP changes (required for latest configurator release)

- New LBEEP RSSI mode
- CLI option for "slave mode" added