CTR2 2026 Product Line
2025 in Review I’m the first to admit that CTR2 products have gotten confusing over the years. At the first of 2025, I introduced CTR2-Dial, a MIDI controller based on…
Download the Latest Updates – January 1, 2026
Find the latest CTR2 firmware updates here
CTR2-Quad
CTR2-Quad is the latest addition to the CTR2 product line. It is a four-knob controller based on the M5Dial from M5Stack. It shares the firmware and hardware concepts from its…
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-Flex/CTR2-Dial Dual-Boot Firmware v2.03.06
The new CTR2-Flex v2 firmware allows you to boot either CTR2-Flex or CTR2-Dial firmware without re-flashing your CTR2 controller.
Download CTR2-MIDI Firmware – v2.00.02
Download the latest CTR2-MIDI firmware for CTR2-MDI and CTR2-Micro here
QST and QEX Article Reprints
ARRL has graciously published several of my articles covering several of my products. Read them here.
Using MIDI to Control Non-MIDI Apps
CTR2-MIDI and CTR2-Dial provide physical tuning knobs for radio control apps such as SmartSDR for iOS/MacOS, Remote Ham Radio, Thetis, and several others. With all the bells and whistles that…