screen lights flash randomly

[lolo020678]

Hello,

I have a pump S100101 (Square) and SPA Bahamas. I have PCB version B. The nodemcu V3 works fine and the connection to wifi is ok. The problem is that the led in the screen flash randomly. I have use the level converter blue. Do you think the problem is the level converter ? I need used the red one ?

Thank you for your response.

[visualapproach]

hello, you probably need to use the B ports with filters installed. Possibly the capacitors can be omitted, but you have to try.

[lolo020678]

Hello. I have received today the level converter (the red one) and now all work fine.

I confirmed for the SPA Bahamas the system works.