Bluetooth LE CAT control for use with RumlogNG / RumlogNG2GO and KX2

Print a case to mount your Bluetooth LE CAT control dongle for use with RumlogNG & RumlogNG2GO. 

For this build, I used a TRRS socket in the case. The battery ground is soldered to the sleeve. Ground for the circuit is soldered to Ring 1. When you plug in a TRS 3.5mm cable, this closes the circuit and turns the device on.

The cover fits snug. I hold it closed with label tape.

For instructions on how to build, see the forum thread here:

https://dl2rum.de/forum/viewtopic.php?t=840

Parts list:

Adafruit Bluetooth LE UART Friend

https://www.adafruit.com/product/2479

MakerFocus 2000 mAh lips battery (bigger than needed but it's what I had.)

https://tinyurl.com/y22m468u

3.5mm TRRS breakout board

https://tinyurl.com/4mzenk27

Max3232 breakout board

https://tinyurl.com/2j2ave9k

USB C charge board for 1s Lipo battery

https://tinyurl.com/mrzvaz3b

Also needed is wire for hookup. I used 28 ga silicone wire for power connections For signal connections I used  30 ga silicone wire.