Is it still impossible to send text strings from Tasker of IFTTT to Amazon Echo?

Not via IFTTT, but you can do it with a local LANdroid setup. See the following thread. You’ll see several skeptical posts from me essentially asking “really?” But, yes, really. These guys did figure out a way to make it work. Not sure if this will fit your use case, but it’s worth taking a look at.

1 Like