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README.md

Spaduino

Arduino sketch that let you talk to your Calspa controller over I2C

Tested on an ATmega328P running at 3.3V/8MHz. Works on a 2012 Cal Spa with a Balboa controller CS6200DV. Other Balboa based controller with "dumb" Top Side displays might work.

Flash your chip with this sketch. You need to connect wires similar to this:

Breadboard for Spaduino

For more information regarding the pins, see the Cal Spa Connector

I use this setup with a WiFi microcontroller to monitor the hot tub remotely using MQTT.

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Arduino sketch that let you talk to your Calspa controller over I2C

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