Hi Les.
You mention setting the app to "LC Tech". Can you give a link to the relay board you bought - just to make sure we are talking about the same board.
Does the “AI-Thinker_xxxxxx” network show up on your phone? If so, you need to connect your phone to that network first before the App can talk to it.
Also, disconnect any other device from the “AI-Thinker_xxxxxx” network to avoid confusing it.
It is also possible the board you have uses different commands - hence a link to the one you bought should help identify it.
Cheers, Bob.
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