At present I have some EC and pH sensors (not from Atlas Scientific) that I’ve connected to an ADC (ADS1115) and it is possible to manipulate scaling constants and conversion equations by hand to obtain calibrated outputs. However, I’m hoping to create a custom input to compute/derive EC or pH readi…

@KyleGabriel Thanks for your help pointing the way, I’ve been successful at implementing custom inputs for analog pH and EC probes read using the ADS1115. The probes I use are DFRobot’s Gravity: Analog pH Sensor / Meter Pro Kit V2 for pH, the Gravity: Analog Electrical Conductivity Sensor /Meter V2…

What I’m saying is I haven’t changed anything related to how data is saved or presented. None of my changes should have affected that behavior. Has something changed about your setup, such as using an external temperature measurement for compensation?

Indeed, I don’t see any of your changes changing this behavior… unless the block of code containing all the get_custom_option() calls (that you’d removed) in initialize_input() was somehow getting called repeatedly in the custom input I shared? No, I haven’t changed my setup – I am still connecting…

initialize_input() is only called once during activation, so wouldn’t have an affect later when a calibration is called. I just reviewed all the code executed and I can see no reason why you would experience different behaviors. The frontend should not be able to load until the calibration function …

So, I tried importing my old custom input again (changed the name to avoid conflicts). I don’t see the old behavior any more – it behaves exactly the same as your revised version. Perhaps I’m misremembering, or the behavior changed between v8.9.2->master.

So I reviewed the code and conducted some tests. When a Custom Action button is pressed for an Input, a thread is spawned that executes the specified function in the Input. It does not wait for the function to complete before the web UI is reloaded as I originally thought. This means, depending on h…

@Roberto seems to be having issues with the ADS1115 pH/EC Input over on this topic: [image] ADS1115 unstable measurements Mycodo input Hi, connecting all 4 inpu…

Hi, I thought it’s more appropriate to answer here. [image] ADS1115 unstable measurements You can do an experiment without bothering with Custom Inputs. Just set it up as a regular ADS1115 as you have done. I’ve done the experiment. With EC probe inside the solution i have no chanche to mea…

[image] Roberto: My question is why producer lost the capacitors or at least warned on the manual? That’s because they sell an “ isolator module ” to solve this… Now it just so happens that the capacitors work for isolating the EC from pH, I don’t know if it’s a good solution for every possibil…

[image] dookaloosy: I do not have the isolator module so I couldn’t say how well it works compared to the capacitor hack. Works well for me. [image] dookaloosy: Are both probes in the same physical location in the solution? The EC can be affected by boundary conditions. Don’t mount it to…

I recently bought the DFRobot isolator modules and tested them against the capacitor hack. The issue I have found with the capacitor hack is that while they are successful at removing the galvanic offset, the choice of capacitor affects the EC reading. The use of the capacitors injects additional ca…

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How to create a custom input with calibration using ADS1115 ADC and Gravity analog pH and EC sensors?

Mycodo