While there is the excellent https://github.com/ccutrer/balboa_worldwide_app project that handled the new WiFi capable BP range of controllers, their project is NOT compatible with the older GL/EL range such as the GL2000, GL2001 or EL2000 - This one is.
The aim of this project is to achieve similar Home Assistant integration as the app from ccutrer - we are about 95% of the way there
If you have the Balboa GS series please try - https://github.com/MagnusPer/Balboa-GS510SZ
App for ESP32 or ESP8266 that sends current status and allows remote control using Home Assistant and also simple web status page with live updates via WebSocket
Original discssion regarding support for spa controllers with 8 pin rather than 4 pin main panels
- 8-pin Molex ccutrer/balboa_worldwide_app#14
- Pin 1+3 - RS485
- Pin 2,4 - Unknown
- Pin 5 - Main panel port selector
- Pin 6 - 9.7V - PSU - limited current avail
- Pin 7+8 - GND
https://www.digikey.co.uk/en/products/detail/molex/2147562082/12180458