Pool monitoring water values

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1

Hello,

I just wanted to publish my project here. Maybe it will help one or the other.

It’s about pool monitoring/water quality.
The display takes place in HomeAssistant.
The whole thing runs on ESP-Home and that in turn was used/played in HomeAssistant.

I actually created all the sensors using the page “https://esphome.io/index.html”. I looked closely at what an analog sensor looks like AND what filters are available.

Hardware:
ESP32-WROVER-E

Pressure sensor https://www.amazon.de/dp/B07T5CSWHL?ref=ppx_yo2ov_dt_b_product_details&th=1

PH-sensor https://www.amazon.de/dp/B07QKK1XB6?psc=1&ref=ppx_yo2ov_dt_b_product_details

Calibration solution https://www.amazon.de/dp/B06XPX11L4?psc=1&ref=ppx_yo2ov_dt_b_product_details

TDS pollution https://www.amazon.de/dp/B08DGLY3J2?psc=1&ref=ppx_yo2ov_dt_b_product_details

temperature DS18B20 https://www.amazon.de/AZDelivery-digitaler-Temperatursensor-Temperaturfühler-wasserdicht/dp/B07KNQJ3D7/ref=sr_1_6?keywords=ds18b20+wasserdicht&qid=1697968258&sr=8-6

Code

esphome:
  name: esphome-xxxxxxxxx
  friendly_name: ESPHomePool

esp32:
  board: esp32dev
  framework:
    type: arduino

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "xxxxxx"

ota:

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  ap:
    ssid: "xxxxx"
    password: "xxxxx"

captive_portal:

dallas:
  - pin: GPIO25
    update_interval: 60s

sensor:

#TDS Sensor
# Temperature In °C
  - platform: dallas
    address: xxxxxxxx
    name: "Pool Temperatur"
    id: probe01

# Raw TDS Reading
  - platform: adc
    pin: GPIO36
    name: "TDS 01 Raw"
    attenuation: 6db # only for ESP32
    id: tds01_raw
    update_interval: 60s
    unit_of_measurement: "v"
    accuracy_decimals: 3
    internal: true
  
# Temperature Compensated Voltage
  - platform: template
    name: "TDS 01 TCV"
    id: temp01_comp_v
    unit_of_measurement: 'v'
    accuracy_decimals: 3
    lambda: 'return ((id(tds01_raw).state) / (1 + (0.02 * ((id(probe01).state) - 25.0))));'
    update_interval: 60s
    internal: true

# Temperature Compensated TDS
  - platform: template
    name: "TDS-01"
    unit_of_measurement: "PPM"
    state_class: "measurement"   
    accuracy_decimals: 0
    update_interval: 60s    
    lambda: return (133.42*(id(temp01_comp_v).state)*(id(temp01_comp_v).state)*(id(temp01_comp_v).state) - 255.86*(id(temp01_comp_v).state)*(id(temp01_comp_v).state) + 857.39*(id(temp01_comp_v).state))*0.5;

#PH Sensor
  - platform: adc
    pin: GPIO35
    name: "pH Sensor"
    update_interval: 60s
    attenuation: auto
    device_class: ""
    unit_of_measurement: "pH"
    filters:
      - calibrate_linear:
          - 1.145 -> 6.88
          - 1.319 -> 9.22

#Druck Sensor
  - platform: adc
    pin: GPIO34
    name: "Pumpe Druck"
    update_interval: 60s
    attenuation: auto
    device_class: ATMOSPHERIC_PRESSURE
    state_class: "measurement"
    unit_of_measurement: "bar"
    filters:
      - calibrate_linear:
          - 0.4 -> 0
          - 0.85 -> 0.5
          - 1.45 -> 1 
          - 2.1 -> 1.5
          - 2.9 -> 2    



#Voltlesen
#  - platform: adc
#    pin: GPIO35
#    name: "Flex 0"
#    update_interval: 1s
#    attenuation: auto

Maybe that will help someone.

2 Likes
2

It helped me! [But, see edit, below]

I already have temperature sensors in my spa (hot tub) and wanted to expand. The next step would be a PH sensor. That’s the one value I have to check daily. There’s also Bromine, but I can pretty much estimate when I need to add more.

With a PH sensor, I wouldn’t need to go open the spa for daily checks. I didn’t realize such an easy solution existed, all wired and ready to connect to the GPIO pins of an ESP. Thanks!

Edit: I started reading more on the PH monitoring probe. Unfortunately it isn’t designed for continuous use. It’s intended to be kept dry in between measurements. Oh well. Looks like the old-fashioned test strips are still going to be the best way to monitor PH for me.

3

Hello,
yes, that’s really the case with the PH sensor, unfortunately it’s not intended for continuous use.

4

Hi @bluhminga,

thank you for this contribution. I can see that the pressure sensor is for a 5V VCC. I guess your ESP32 circuit provides 3.3V.

I guess that is also the reason for the lines calibration in your YAML file. Is that so? Did you use a voltage divider to scale the 5V down to 3.3? Can you maybe share the specifics of this setup?

What are the values on the left?

    filters:
      - calibrate_linear:
          - 0.4 -> 0
          - 0.85 -> 0.5
          - 1.45 -> 1 
          - 2.1 -> 1.5
          - 2.9 -> 2
5

has anyone tried or have the code for ORP sensor?