Remote for Festool CTL SYS

The Festool bluetooth remote module is not compatible with the CTL SYS. Someone already created a solution to make the bluetooth kit compatible: (https://github.com/jenskueper/festool-ctl-sys-bluetooth).

Inspired by this solution I created a variant using a simple 433MHz based potential free relay

Bill of materials:
- 1pcs KR2202-4 (1pcs)
https://www.aliexpress.com/item/4000926100221.html (Option: Receiver only)
- 1pcs Transmitter
https://nl.aliexpress.com/item/1005007648387080.html
(Updated link 2025-05-03, unverified product)
- 2pcs 3M Scotchlok IDC Connector 804 (or similar 16awg wire tap)
- 1pcs Connector JST-ZH 1.5mm pitch 5-pin male with cable (extend to ~40cm)
https://nl.aliexpress.com/item/1005006135792829.html (Option: ZH 1.5mm)
(Updated link 2025-05-03, unverified product)
- 1pcs 1.5mm2/16AWG cable 30cm (pair of brown and blue)

Assembly instructions (photos in corresponding order):
- Remove vacuum power. Do not resume of you are not familiar with modifying 230v