MMDVM Repeater stays keyed

[kk4gxp]

I hvae a Kenwood TKR-750 repeater, and the Repeater Builder stm32 mmdvm board. Everything is configure and works great, however, something is keeping the repeater keyed for some reason. The hold times in the repeater programming software have been shortened 0.5 seconds, and in Pi-star settings, I have tried multiple values for tx hang, and still have the same problem. I even tried a pull-up resistor on the ptt line and that didnt help either. It also happens when there is no internet connection. Im at a loss. Anyone have any ideas?

[VK7HSE]

Try inverting the PTT logic under MMDVM settings in the expert panel

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[kk4gxp]

When i do that, then the mmdvm won't key the repeater at all....