I would like to send a message to an amazon alexa, e.g from an MQTT device that a sensor has been affected, e,g, a switch has changed, or a temperature has been reached. I can easily write a script to send arbitrary text messages, but how do I send them ? Do I need to make my own skill ?
I recommend you have a read through this thread, and related.
I learnt a lot from some community members there and now have Alexa tell me, depending where I am in the house, all the latest information I need to know.