Achieved:

• Add two CRSF "trigger" packets - make the FC arm/disarm
• Add button detector - pressed/released
• Add support for Sony Multi-Terminal protocol
• Improve UI
• Provide an easy-to-go DIY board - then hook up a betaflight FC
• Add "EEPROM" and "menu" for changing some settings and saving that after powering off
• Improve "menu" logic and UI
• Make Sony camera can work in MASTER/SLAVE mode
• Add ADC reading
• Allow PAGE to check battery voltage during recording
• Sign "device_mode" with actual device behaviour
• Add support for "audio sync" - put sync signal on both camera's audio track and on FC's throttle (maybe roll pitch or yaw alternatively) channel, requires a new CRSF packet
• Add support for Momentary Ground
• Add support for Schmitt trigger
• Add support for ZCAM UART protocol

In plan:

• Add support for LANC protocol
• Add support for HDMI CEC protocol
• Add support for RED protocol: link

Final goal:

• small size motion logger box, easy to mount, easy to use