I’d like to use the special/virtual station feature to control a grow light for our tomato starts. Is it possible to do this using an off-the-shelf “smart switch?” Is there a particular spec or API that I should look for? Any specific devices that you’d recommend?
If your ‘smart switch’ has an HTTP API, you can make use of the ‘HTTP station’ on OpenSprinkler to send on/off command to it. Specifically, you can set any zone to be an ‘HTTP station’, providing the HTTP commands for the on signal and off signal. In the open hardware community, sonoff power sockets are quite popular and cheap, though I haven’t looked into its API yet.