How do I automate disabling mobile data on Lollipop?

I have recently changed my Moto G LTE (XT1039) from Android 4.x to 5.1. The device is not rooted. After the update, I found that Llama - Location Profiles 's toggle mobile data - mobile data off action fails to disable my mobile data. After checking out a few alternatives, I found that several automation apps have reviews mentioning a similar situation. For example Data ON-OFF has this review: > Not working 5.1 motto 4g Used to work on 4.4.4 uninstalled until it gets an update. How do I automate the toggling of mobile data on/off in Android 5.1? Or, has there been a change to the Android API to remove this functionality?