Simple and universal PLC for smart home

I/O board for smart home (optional onboard attiny85 for simple task, for more complex is SAMD11) or connect with I2C to ESP8266 / ESP32

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designed for I2C communication
heart is MCP23017 16 bit expander
8 mosfet outputs
8 optically isolated outputs
buttons and leds for easy debugging
DIN compatible enclosure

what is universal? because this is only I2C expander
you can connect master processor like ESP32, Stm32 or arduino

BONUS !!!! (to use some free space) -option to assembly
- for simple operation is on board Attiny85
- for little more complicated task is onboard arduino compatible SAMD11

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