Atlas Scientific EZO i2c sensors

[Neukam]

Describe the problem you have/What new integration you would like

I would like to see support for Atlas Scientific EZO sensors with i2c interface, specifically the ORP and PH sensors

Please describe your use case for this integration and alternatives you've tried:

I want to be able to fully automate my pool with salt water generator. I'm currently using a Sonoff 4ch running Tasmota to control the pump, SWG and lights and read from a DS18B20 temperature sensor. I would like to be able to add the Atlas Scientific sensors and switch to ESPHome so that i can control the runtime of the SWG based on ORP, and also monitor PH. These sensor modules could also be useful for a hydroponics system.

Additional context

There is a library with examples.
There are datasheets and documentation on the product pages.
The following EZO devices are available
ORP
PH
Dissolved Oxygen
Electrical Conductivity
RTD Temperature
Flow Meter Totalizer This could be useful for tracking domestic water usage
50 psi Pressure Sensor
Peristaltic Dosing Pump
RGB Color Sensor

Atlas Scientific also has a Hydroponics Kit which has an ESP8266 mounted on a carrier board with PH, Electrical Conductivity, and RTD Temperature EZO boards with a provision to add one additional EZO board. This could also be very useful for a pool controller. Their code for the ESP is open source and posted on their github.

[dylonsease]

User @ssieb has a custom component for these sensors. github com/ssieb/custom_components/tree/master/ezo

I have my sensors on a tentacle shield attached to an arduino mega, the scl and sda pins from the mega are attached to the D2 and D1 pins on a NodeMCU.

I created a folder called "custom-components" under my esphome folder and placed ssieb's "ezo" folder in it.

Here is the relevant part of my yaml file.

i2c:
  sda: D2
  scl: D1
  scan: True
  id: bus_a

  #ezo platform from: https://github.com/ssieb/custom_components
sensor:
  - platform: ezo
    id: ph_ezo
    name: "pH"
    address: 99
    accuracy_decimals: 2
    unit_of_measurement: "pH"

      
  - platform: ezo
    id: rtd_ezo
    name: "RTD Temperature"
    address: 101
    accuracy_decimals: 2
    unit_of_measurement: "°C"

      
  - platform: ezo
    id: ec_ezo
    name: "EC CN"
    address: 100
    accuracy_decimals: 0
    unit_of_measurement: "CN"

Here is a snip of how it looks in Home Assistant:

I don't have much experience with esphome or arduino, but ssied's component made this easy.

[ssieb]

Ok, fine, I'll write up the docs and file a PR. :-)

[dylonsease]

Ok, fine, I'll write up the docs and file a PR. :-)

I was trying to get these sensors to work for the last couple days, stumbled across your repo and presto I was up and running. Thanks for putting it out there, I really appreciate it! So much that I had to share on this thread!

[Neukam]

Sweet! You guys are awesome! I'll be trying this out this weekend

[iHakia]

Hi guys, Thanks for the help implementing those sensors.
I'm really trying to get this one working. for now, it seems that I have problem with the esphome folder structure or something.
the files are located at \config(where my HA configuration yaml)\esphome\custom_components\ezo
this is my code

esphome:
  name: nfatxxxxxlas
  platform: ESP8266
  board: esp01_1m
  includes:
    - ezo.h

i2c:
  sda: 4
  scl: 5
  scan: True
  id: bus_a

wifi:
  ssid: "xxxxxx"
  password: "xxxxx"

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "xxxxFallback Hotspot"
    password: "LYoPZoHB4pdh"
    
sensor:
  - platform: ezo
    id: ph_ezo
    address: 99
    unit_of_measurement: "pH"

captive_portal:

# Enable logging
logger:

# Enable Home Assistant API
api:
  password: "xxxxxxxx"

ota:
  password: "xxxxxxxxxx"

Unfortunately I keep getting the message
"platform not found. 'sensor. ezo'"
anyone have an idea?
Help much appreciated 👍

[ssieb]

Don't use the include. Do you have all the files, including the two python ones in the ezo directory?

[iHakia]

Don't use the include. Do you have all the files, including the two python ones in the ezo directory?
I guess that yes.
I removed the include. still not working :/

[ssieb]

Which esphome version are you using? You might need to use dev.

[dylonsease]

Double check your folder path. Here is mine. It looks like I had a typo in my instructions above.

[ssieb]

That looks the same as his. It's likely that it needs something that is only in dev. It would be something in the config parsing because that would make it not find the sensor code. If you use the cli esphome to compile it, you would see the error message.

[dylonsease]

They typed it with the underscore but the picture of their config has a hyphen. Unless I'm not seeing something since I'm on mobile.

[ssieb]

Oh, good catch! I completely missed that. 🤦

[iHakia]

Oh, good catch! I completely missed that. 🤦

thanks mrgoose2 - That Worked!!!
Thanks for that 👍

[iHakia]

So now we now that custom_componenets works while using normal esphome version.
Now I have all my EZP sensors working and I this is how it's look on my config side.
Is there a way to do the Calibration side of things also?
PH calibration
EC calibration
DO calibration
?

`sensor:

• platform: ezo
  id: ph_ezo
  address: 99
  unit_of_measurement: "pH"
  update_interval: 10s

• platform: ezo
  id: rtd_ezo
  name: "RTD Temperature"
  address: 102
  accuracy_decimals: 2
  unit_of_measurement: "°C"
  update_interval: 10s

• platform: ezo
  id: ec_ezo
  name: "EC"
  address: 100
  accuracy_decimals: 0
  unit_of_measurement: "PPM"
  update_interval: 10s

• platform: ezo
  id: do_ezo
  name: "DO"
  address: 97
  accuracy_decimals: 0
  unit_of_measurement: "mg/L"
  update_interval: 10s`

[ssieb]

You can do the temperature calibration in a lambda using id(ph_ezo).set_tempcomp_value(rtd_ezo.state); for example. You need to decide when you want to calibrate it based on time or change in temperature.