CTR2-Duo
CTR2-Duo is a two-knob controller based on the M5Dial from M5Stack. It was originally branded CTR2-Flex and optioned with two knobs. To minimize confusion, the two-knob CTR2-Flex was rebranded as…
CTR2-Uno
CTR2-Uno is a single knob controller based on the M5Dial from M5Stack. It was originally branded CTR2-Flex. To minimize confusion, the single-knob CTR2-Flex was rebranded as CTR2-Uno to differentiate it…
CTR2-Flex – Now CTR2-Uno and CTR2-Duo
January 1, 2026 Update To simplify the CTR2 product line, CTR2-Flex hardware is being rebranded. The one and two knob hardware is exactly the same as before, but with new…
CTR2-Dial – To Be Discontinued
January 1, 2026 Update In order to simplify the CTR2 product line and eliminate confusion, CTR2-Dial hardware is scheduled to be discontinued once the current inventory of parts runs out.…
CTR2-Flex Firmware
CTR2-Flex firmware is derived from CTR2-Micro firmware. It connects to your radio using WiFi so it’s usable anywhere on your LAN. It doesn’t support SmartLink so remote operation requires either…
CTR2-Dial Firmware
CTR2-Dial is an enhanced version of CTR2-MIDI with a color touchscreen display. It is designed to send MIDI commands to a 3rd-party radio control app, such as Marcus’ (DL8MRE) excellent…
CTR2-MIDI Assembly Manual – v1.00d
The CTR2-MIDI kit is an easy to build project that you can complete in one evening
Download CTR2-Voice Firmware – v1.01.03
Download the latest firmware for CTR2-Voice here
CTR2-Voice Operation Manual – v1.01.03
Download the operation manual for CTR2-Voice here