However, I'd like to avoid needing an extra power supply, so I'm wondering if it would be possible to power the MCU from the connector somehow (I'll also have to see if that 5V rail can deliver enough current, obviously).
The units have a front panel with some status LEDs, a push button, and a photoresistor (for automatic dimming of the LEDs at night), connected through a 6-pin IDC connector, which I've already reversed:Īs you can see, there's no obvious signal ground, the cathodes of the status LEDs are probably pulled to ground by an MCU inside the unit itself.įor turning these things smart, I was thinking of designing an interposer board between the original front panel and the ribbon cable coming from the unit itself. I'm considering turning the ventilation units in our apartment "smart" by addition of a WiFi-capable MCU (ESP32C, RPi Nano W.
0 kommentar(er)
