slave 2.1 Doser as ATO on P4 and optical sensor

[Jaycee75]

I have a P4, a Slave 2.1 doser, and a Optical Sensor connected to the P4.


How do I set up the P4 so that it uses the level sensor to activate one of the dosing pumps on my Slave Doser when the sensor detects low water?

I don't seem to be able to find a guide to do this

[Australian-Reefer]

Check out these videos with detailed instructions by GHL USA for your case and for most other situations:

https://www.youtube.com/playlist?lis...eNOkcebAh-iCL8

[Vinny]

Here's a video which shows you how it's done: