Important CTR2-Max Update – October 24, 2026
The bad news… A recent push by the FCC to require FCC certification of all RF emitters sold in the United States caused me to re-evaluate the components I use…
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 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…
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