
2007: before IoT and Smart home💡DIY manual On/Off regulating HeadEnd temperature 🌡️ via browser + reley board
The I/O button was accessible via 2 wires soldered onto the remote control unit mainboard.
On/Off was simulated via IP module + reley board using Normally Opened/Normally Closed pins.
Basic HTML was implemented to place K1 check box onto the I/O button ✅
The HEADEND air-condtitioner (unknown manufacturer KOBE) used to switch off after every power surge, but this DIY technique saved our lives 2007 - 2016, after every NOC calling to alarm us about high temperature.
It was real fun, huh? 😇 😁
Back in a day we didn't know anything about IoT, Smart home etc.😎