# Atlas Scientific I2C probe reading
**URL:** https://discourse.nodered.org/t/atlas-scientific-i2c-probe-reading/31349
**Category:** General
**Created:** [9 August 2020 22:18 UTC](https://discourse.nodered.org/t/atlas-scientific-i2c-probe-reading/31349 "2020-08-09T22:18:11Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Sebchauvour](https://discourse.nodered.org/u/Sebchauvour)
#### Post date: [9 August 2020 22:18 UTC](https://discourse.nodered.org/t/atlas-scientific-i2c-probe-reading/31349/1 "2020-08-09T22:18:12Z")
Bonjour Hello
J’ai un probleme de lecture des sondes Atlas scientificI Have a problem reading the Atlas scientific probes
Les sondes sont bien configurées en I2C The probes are well configured in I2C
Scan I2C = 99(PH), 100(EC),102(Temp)
Je pense que le problème vient de la configuration des node exec (error :255) I think the problem comes from the configuration of the node exec (error:255)
FLOW Startup Atlas, Sensors Startup , exec node = error :255
FLOW EC Sensor Flows, EC Sensor, exec node = error :255
FLOW PH SENSOR FLOWS, PH Sensor, exec node = error :255
Edit exec node
Properties
Command "pigs" ???????
Je suis débutant sur node red I am a beginner on node red.
My configuration:
Raspberry PI4
Whitebox Labs Tentacle T3
EZO™ pH Circuit
EZO™ Conductivity Circuit
EZO™ RTD
Temperature Circuit
Merci pour votre aide Thanks for your help
Sebastien
   [Projet complet.json](https://discourse.nodered.org/uploads/short-url/7l2a7XYgtrENKL3BQxnXjO9wvNR.json) (171.8 KB)
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [8 October 2020 22:18 UTC](https://discourse.nodered.org/t/atlas-scientific-i2c-probe-reading/31349/2 "2020-10-08T22:18:14Z")
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