Atlas-Scientific EZO Devices Simple Read over i2c Example

This is an extremely basic Flow for reading data, via the i2c inteface, from most of the Atlas-Scientific EZO sensors, circuits and devices:

RTD, pH, ORP, EC, DO, FLO, PMP, HUM

The folowing are not included, but the above code will be very easy to modify to accomodate them:

PRS, O2, CO2

Recall the intent of this flow is to help users to retrieve very basic measurements from the EZO devices and work with those values in Node-RED. Therefore, there are no provisions for configuration, calibration, compensation (e.g. temp comp for pH), nor database logging in this example.

This example assumes the default i2c addresses are in use. The devices must be configured to output the variables that are retrieved by the example. A few node-RED nodes must be installed. There are comments throughout the flow that indicate which variables are being retrieved.

I hope some will find this very basic flow useful. I will continue to publish much more complex examples of flows that include some configuration, calibration, compensantion and data logging capabilities.

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Volume over time is not enabled in this example.","x":70,"y":1560,"wires":[]},{"id":"4b9f307a.5a52b","type":"inject","z":"75d5afa3.3a744","name":"Poll","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":true,"onceDelay":"1","topic":"","payload":"","payloadType":"str","x":90,"y":60,"wires":[["1ea838b4.a6f607"]]},{"id":"1ea838b4.a6f607","type":"function","z":"75d5afa3.3a744","name":"init","func":"var target=0;  \nflow.set('target')","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":250,"y":60,"wires":[[]],"outputLabels":["Status"]},{"id":"d5520700.f4f898","type":"comment","z":"75d5afa3.3a744","name":"Init","info":"Several Nodes must be downloaded so that this Flow and the Dashboard will function.\n\nPlease install the following via the NodeRED palette: node-red-contrib-i2c\nnode-red-contrib-i-artless-gauge\n\nThis flow has only been tested on RaspberryPi4B. You must enable i2c on the 4B.\n\nThese are very basic read/command samples. Addresses are hardcoded. No provisions exists for performing any configuration or calibration on these devices. No reading compensations (e.g. temp comp for pH) have been enamed in this very simple example.\n\nPlease thoroughly review the corresponding DataSheets for each device/sensor from Atlas-Scientific.\n\nPlease view the initial Node-RED tutorials before working with this node.\n\nThe System Tab in the Dashboard is useful for restarting Node-RED or rebooting your RaspberryPi.\n\n","x":70,"y":20,"wires":[]}]

Flow Info

Created 1 year, 6 months ago
Rating: not yet rated

Actions

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Node Types

Core
  • change (x2)
  • comment (x9)
  • delay (x8)
  • exec (x3)
  • function (x16)
  • inject (x9)
  • mqtt-broker (x3)
  • switch (x2)
  • websocket-client (x1)
  • websocket-listener (x1)
Other
  • i2c in (x8)
  • i2c out (x10)
  • ncd-comm (x1)
  • profile (x2)
  • tab (x2)
  • ui_artlessgauge (x12)
  • ui_base (x1)
  • ui_button (x5)
  • ui_group (x9)
  • ui_slider (x1)
  • ui_spacer (x29)
  • ui_tab (x2)
  • ui_text (x12)
  • ui_toast (x2)

Tags

  • SonoraTechnical
  • i2c
  • Atlas-Scientific
  • EZO
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