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mzakharo committed Feb 16, 2023
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# tubby
Hot Tub Sensor and Automation.
# Hot Tub Sensor and Automation.

- Battery powered ORP, PH sensor for Hot Tub or Pool sensing applications.
- Deep & Light sleep for extended battery life
- Battery powered ORP, PH sensor for Hot Tub/SPA or Pool sensing applications.
- Deep & Light sleep for ~ 1 year battery life @ 2 samples per hour
- MQTT with Home Assistant Auto Discovery
- Remote Logging and OTA over MQTT
- PH ATC (Automatic Temperature Compensation) integrating with [Balboa](https://github.com/mzakharo/pybalboa) temperature sensor
- Free Chlorine/Bromine estimator model from PH and ORP values

# Photos

- The unit: https://photos.app.goo.gl/cud7ST96oGnMVKvp7
- Grafana view: https://photos.app.goo.gl/5XL6RLwuQzMN658Q7
<img src="https://github.com/mzakharo/tubby/blob/main/pictures/final.jpg" width="250" height="400"> <img src="https://github.com/mzakharo/tubby/blob/main/pictures/probes.jpg" width="250" height="400"> <img src="https://github.com/mzakharo/tubby/blob/main/pictures/cal.jpg" width="250" height="400">

# Hardware

- Ultimate-Maker FeatherS2 ESP32 board (has an extra regulator that shuts off power to the Analog sensors).
- [UM FeatherS2](https://unexpectedmaker.com/shop/feathers2-esp32-s2) ESP32 board
- 3500 mA battery
- Atlas Scientific Analog Kits
- Atlas Scientific Gravity Analog [ORP](https://atlas-scientific.com/kits/gravity-analog-orp-kit/) and [PH](https://atlas-scientific.com/kits/gravity-analog-ph-kit/) Kits
- Enclosure: https://www.adafruit.com/product/3931
- 2 resistors for battery sensing


# Firmware
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