Can anyone suggest a projector screen that I can control with ST or suggest a way that I can get a screen and swap out the relay or something like that? Someone must have done this before…
Thanks
tgauchat
(ActionTiles.com co-founder Terry @ActionTiles; GitHub: @cosmicpuppy)
2
If projector has RS-232 serial port (old technology, but still common), then it is a pretty easy Arduino project; if you want to tinker with hardware. That’s how mine works. I’m still using Thing Shield (no longer sold by SmartThings ).
If it has 12 volt trigger input (also very common), you could just plug a 12v power DC transformer into any smart outlet, and run the 12 volt output to the trigger input.
If it has Ethernet/LAN/WiFi connection, then a Device Type Handler can likely be written to send the message via “Hub Action” commands; except there is no support for Telnet. In this case, Arduino or Pi could bridge the gap.
tgauchat
(ActionTiles.com co-founder Terry @ActionTiles; GitHub: @cosmicpuppy)
3
Ooops… My answers were more about Projectors, rather than Screens.
if it is radio controlled, you can use Arduino with a 433Mhz or ummmm… 328Mhz (whatever the common lower frequency is) to activate. My Projector Arduino does both the projector and the screen.
if it just has relays, you can drive a relay with 12 volt DC power transformer wall wort plugged into a SmartOutlet. Two may be required (up and down). Or use Arduino or ESP to control the two relays.
If it’s RF like mine I just used a IR/dual relay(search the forum and full details are posted) and wired it into the remote or control box. Harmony has built in codes so it’s a breeze and only cost like $20 for the relay.