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How to make a wireless ThumbsUp! with a touchpad using ZMK and ProGlide Cirque

ThumbsUp! can be made wireless using a nice!nano v2 MCU (or its clone) running ZMK.

Recently ZMK got support for ProGlide Cirque touchpads, and the biggest difference from QMK was requirement to have an activity pin (DR) to be used/specified in the configuration.
My configuration project is here: https://github.com/ak66666/zmk-config/tree/cirque

Unfortunately that requirement was not known to me when I designed ThumbsUp! boards, so in order to make these boards wireless and with touchpad I had to add a bodge wire from the touchpad to a inter-PCB connector, and then from the connector on the other plate to the controller.

Luckily there were a few unused pins in v9, so the task turned to be relatively easy.

Step 1. Solder the wire to the third pin from the top on the innermost row:

Step 2. Solder the other end of that wire to one of the pins in the center header. For that - gently pry the plastic spacer a up halfway, and solder the wire as close to the board as possible. I chose the bottom one since there is a groove on the bottom side of that plastic spacer, enough for a tiny solder joint.

Step 3. Connect the connector with pin 107 on the MCU. You may use a shorter wire to make it neater.


In any case the wire then is folded and is hidden underneath the MCU along with the battery.


Once the PCBs are reattached all the wires are hidden from the view.

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