Check the status of the lamp with LDR( replacing chain sensor)

[PeteKnight]

This, and the linked topics within it, are a good starting point:

2 way lighting circuit control with blynk and feedback updates

Hi Guys, Wonder if you can help. I am controlling several 2 way lighting circuits using an arduino and Blynk. I am using 2 way so I can turn lights on in a garden room by a switch but also remotely with Blynk(via an arduino controlled 2 way relay) from the comfort of my house. Problem I have is that if I turn the lights on via the manual switch I get no update on Blynk to say lights are on and vice versa ie if I turn lights on with blynk and then off with the manual switch, Blynk doesn’t cha…

Pete.