# Cannot read I2C Atlas Scientific PH EC sensor
**URL:** https://discourse.nodered.org/t/cannot-read-i2c-atlas-scientific-ph-ec-sensor/31218
**Category:** General
**Created:** [6 August 2020 11:12 UTC](https://discourse.nodered.org/t/cannot-read-i2c-atlas-scientific-ph-ec-sensor/31218 "2020-08-06T11:12:11Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Sebchauvour](https://discourse.nodered.org/u/Sebchauvour)
#### Post date: [6 August 2020 11:12 UTC](https://discourse.nodered.org/t/cannot-read-i2c-atlas-scientific-ph-ec-sensor/31218/1 "2020-08-06T11:12:11Z")
Google translate
Bonjour Hello
Voici le projet que je veux utiliser :
Here is the project I want to use :
> **[diverjoe/FishNet](https://github.com/diverjoe/FishNet/wiki)**
>
> Contribute to diverjoe/FishNet development by creating an account on GitHub.
> **[Has anyone created a full Raspberry Pi Aquarium monitoring/control system?](https://www.reef2reef.com/threads/has-anyone-created-a-full-raspberry-pi-aquarium-monitoring-control-system.264093/page-5)**
>
> You should totally do it :) . Its easy, very rewarding and good for STEM education. Forget the whole controller, I was so stoked to see the first time I was able to blink an LED :) . And fact is controlling an equipment/relay is exactly same as...
Après avoir installé tous les nodes est adapter certaine partie du programme.
After having installed all the nodes is to adapt certain part of the program.
Je n’arrive pas à comprendre comment faire pour lire les sondes PH et EC atlas Scientific.
I cannot figure out how to read the atlas Scientific PH and EC probes.
Quand je fais un I2C scan je trouve bien PH 99=0x63, EC 100=0x64, Temp 102=0x66.
When I do an I2C scan I find PH 99 = 0x63, EC 100 = 0x64, Temp 102 = 0x66.
Dans le flow, Node Edit exe node il faut rentrer une commande spéciale ????
In the flow, Node Edit exe node you have to enter a special command ????
Je suis un peu perdu.
I am a little lost.
Equipment:
> **[Whitebox Labs Tentacle T3 | Atlas Scientific](https://atlas-scientific.com/carrier-boards/whitebox-labs-tentacle-t3/)**
>
> The T3 for Raspberry Pi isolates sensors and eliminates issues with noise and ground loops that can arise using the Atlas Sensors in closed-loop systems.
> **[EZO™ pH Circuit | Atlas Scientific](https://atlas-scientific.com/circuits/ezo-ph-circuit/)**
>
> Atlas Scientific’s EZO-pH circuit gives engineers the ability to read pH with the same accuracy and capabilities that were traditionally only found in expensive bench-top meters.
> **[EZO™ Conductivity Circuit | Atlas Scientific](https://atlas-scientific.com/circuits/ezo-conductivity-circuit/)**
>
> The Atlas Scientific EZO-EC Circuit reads conductivity, salinity, and TDS (PPM) which are fundamental measurements of water chemistry.
> **[EZO™ RTD Temperature Circuit | Atlas Scientific](https://atlas-scientific.com/circuits/ezo-rtd-temperature-circuit/)**
>
> The Atlas Scientific EZO-RTD Circuit makes taking high accuracy readings from a platinum RTD probes easy.
Merci pour votre aide. Thanks for your help.
[flows (7).json](https://discourse.nodered.org/uploads/short-url/lel4F9EnY2rWyU8GO1ojM1ZepKK.json) (16.3 KB)
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### Author:  [@SonoraTechnical](https://discourse.nodered.org/u/SonoraTechnical)
#### Post date: [24 September 2020 16:58 UTC](https://discourse.nodered.org/t/cannot-read-i2c-atlas-scientific-ph-ec-sensor/31218/2 "2020-09-24T16:58:37Z")
I had this issue. I found a Fix that I describe in an entry that I made in this thread on May 1, 2020.
[https://discourse.nodered.org/t/aquarium-controller-raspberry-pi-4b-node-red-atlas-scientific-i2c-devices-ncd-i2c-relay-board/25839](https://discourse.nodered.org/t/aquarium-controller-raspberry-pi-4b-node-red-atlas-scientific-i2c-devices-ncd-i2c-relay-board/25839)
Scroll down until you see my entry for May 1, 2020.. and I describe using the i2c nodes to read Atlas-Sci EZO circuits.
Unfortunatley, the thread is closed becuase I did not update the information in a timely fashion, but the information is still relevant.
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [24 September 2020 20:11 UTC](https://discourse.nodered.org/t/cannot-read-i2c-atlas-scientific-ph-ec-sensor/31218/3 "2020-09-24T20:11:56Z")
The thread can be re-opened if you think that there is stuff to add that will make it more useful in the future.
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [23 November 2020 20:11 UTC](https://discourse.nodered.org/t/cannot-read-i2c-atlas-scientific-ph-ec-sensor/31218/4 "2020-11-23T20:11:59Z")
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