Objective
On my salt electrolyser, I have a blue LED that indicates that production is ongoing, if it goes out, I would like my home automation system (Jeedom or Home Assistant) to know to warn me.
I was not going to disassemble the electrolyser to recover a power supply or not from the LED, even if I was itchy, I looked at how to recover rather the ‘visual’ info of the LED on or off.
My idea was to find out if there was a brightness detector, which was simple to interface on my computer. Existing control management system for my pool. My system using an I2C port, I looked for this type of chip and it had to be interfacing on Esp Easy for simplicity.
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