Rule Machine adding NULL to command

magnus.s · September 29, 2020, 9:40am

It's been 20 years since I did any programming and after many many attempts I finally finished my one nested rule to control my air heater / AC unit. When I was done I noticed that RM4 had added NULL in a few places. I tried to remove them, but I wasn't allowed to remove NULL (which makes some sense I guess).

Why where the NULL commands added (in two places) to the ON string?

(ON, , , ) => (ON, NULL, NULL, NULL)

EDIT:
I ran the rule and it produced an error code. I am not tech savvy anymore enought to make any sense of it, but it mentions "null object"? Can you make any sense of it?

arnb · September 29, 2020, 1:14pm

After many attempts at controlling my mini-split AC / heating system with RM, I decided it was easier to write an app. Feel free to use my miniSplit app.

You will need to either rename your rules to conform to those in the app, or adjust the rule names in the app, and perhaps converting it from F to C. It works in conjunction with a Virtual Thermostat. Despite comments in the app: heat, cool, fan, and dry functions are working.

github.com

arnbme/hubitat/blob/master/MiniSplit.groovy

/**
 *  Import Url:   https://raw.githubusercontent.com/arnbme/hubitat/master/MiniSplit.groovy
 *
 *  MiniSplit App
 *  Functions:
 *		Controls my dumb Fujitsu mini splits in conjunction with Broadlink IR blasters, and an HE Virtual Thermostat device
 *      Allows for using mini split Dry mode as part of cooling process, or stand alone.
 *
 *		I wrote this after attempting this with RM, it's just to slow and tedious for coding complex logic, IMHO.
 *		Also I could not get the HVAC manager app functional with my Fujitsu devices
 *
 *	Preinstallation Requirements
 *	1. Install IR Blasters, this app is designed to work with Broadlink devices using the now withdrawn Broadlink Mini Driver app at
 *		https://community.hubitat.com/t/withdrawn-native-broadlink-rm-rm-pro-rm-mini-sp-driver-rc-hvac-manager/31344
 *
 *  2. Create working IR code sets for cooling (multiple temperatures), dry, off, and more as necessary
 *
 *  3. Must have a working Virtual Thermostat (or perhaps a real device).
 *		I use a Virtual Thermostat averaging temperatures from 3 devices using the HE Average Temperature app at
 *		https://github.com/hubitat/HubitatPublic/tree/master/example-apps

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magnus.s · September 30, 2020, 6:47am

Thanks for sharing. Apreciated.

system · September 22, 2022, 4:25pm

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