Handset
Custom DIY dual band (900/2400MHz) transmitter based on ExpressLRS.
User interface
Handset does not have a dedicated screen to show the value.
It is using ESP8266/8285 as a webserver and it is used to display overview and adjust setting. It is also used to provide easy firmware OTA update (STM32 and ESP).
Latency
This is optimized for speed and latency.
Filtering
Filtering amount is minimized to avoid extra latency. Handset is using just oversampling of 4 and measurements proven that no extra filtering is needed.
Firmware
This is using modified and optimized great ExpressLRS firmware.
Current development/experimental version can be found from here
NOTE: current firmware version is NOT compatible with original ExpressLRS firmware!