Hello,
Thanks for reporting back to let others in the future know what the issue was.
Glad to hear you’ve got a good calibration sorted now, all the best with the rest of the project.
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Hi, would this CE09640 soil moisture meter work with a QT Py STEMMA? Or would it be best to get the more expensive STEMMA model?
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Hi,
Since this sensor just outputs an analog voltage, you can absolutely use it with a QT Py, you’ll just be using up one of your analog pins.
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Hi I have just bought a number of these for our school STEM programs and have tried to set them up. I have tried to do a basic analogRead using an arduino uno and the value doesn’t change on the serial monitor regardless whether it is in a cup of water, dry soil, or open air, I have tried several of the sensors and several of the unos but the issue persists. Any help you could give me to get them working would be appreciated
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Hi Shane,
Welcome to the forum!!
There was a recent manufacturing batch issue with some of these soil sensors - to confirm they arent faulty would it be possible to reply to your order confirmation email and we’ll get this sorted ASAP!
FYI the 555 timer onboard was rotated 180 degrees, we’ve got systems in place to prevent this future now 
Liam
Hi Liam
I have forward your message to our finance department who has the original email who will chase this up on my behalf, thanks for your quick reply
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Is that a Gravity connector on the capacitive soil moisture sensor?
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Hi John,
At a glance it looks like its a JST-XH 3P:: Identify Electrical Connectors - Tutorial Australia
(and the other end a dupont style)
Are you looking to extend the wire?
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That’s what I thought I saw. Tks
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Hi,
Would someone please advise if this probe is compatible with the Arduino UNO R3? I’ve found a tutorial here but it has an additional board between the probe and the UNO. Do I need an additional board with this probe and my UNO? If so, what is the name of the board please?
Kind regards,
Michael.
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Hi Michael
It looks like this board is part of the sensor system and comes with the actual probe. It seems to analyse the actual sensor and present the outcome in a form the Arduino will understand.
Cheers Bob
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That ‘additional’ board is an analog-to-digital interface board attached to a bare probe. The Core board does not have the conversion to digital, and the analog part of the circuit is on the same board as the probe. Both boards work just fine with the UNO. The digital part of that board reads the moisture level and determines whether it should be on or off, according to the potentiometer setting. The connection is to a digital input on the UNO which will read 0 or 1.
The Core board is analog so it will connect to an analog input on the UNO and the sketch will read the moisture level as a voltage level with a reading of 0 to 1023. The sketch then uses that reading for whatever you want to do, such as turning a watering system on or off.
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Is there an avaliable 3D model or schematic drawing for it anywhere? Figured I’d ask before I recreate it so that I can design a housing for my project.
Ta!
For this sensor there doesn’t appear to be any sort of 3D model for it, if you do end up making one we would really appreciate if you could post the final result. 
If you ever make a v3, chucking a couple holes in for screws would be very handy
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That is a great idea, I’ll pass that on to our designers so that they can look into it.
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Hi Cameron,
You might be able to 3D print something that connects to these holes (intended for mounting/capturing the sensor)
What were you trying to do with the screws?
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I am looking to extend the wires to place sensors around my small greenhouse.
Having read the article on different connectors and searching for “JST-XH 3P extension”, now I’m not so sure …
- The “JST-XH Extension Cable - 2.5mm Pitch - 500mm long” has the XH connectors, but only 2 wires.
- Next a battery holder, then a 560 piece kit of connectors, and ODB-II cable
- and eventually we get to several Servo extension cables - one of which even mentions that it uses “JR style connections”
I’m probably being overly cautious here, but could you confirm that Core’s FIT0296, FIT0033, and FIT0297 are the extension cables you had in mind.
Also, would it be reasonable to daisy-chain a couple of the extensions to go 1.8m ?
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It occurs to me also that most people use Soil Moisture Sensors to ensure that their plant’s soil doesn’t dry out too much.
But my partner is into Orchids which like to get their moisture and nutrients from the air (there are even varietyies with air roots, that grow halfway up bigger trees) and so I am using a mister to do the watering and wanting to ensure the soil does not get too wet !
Before deploying to the greenhouse I will need to cover the electronics on the sensor board to prevent it getting wet. A 3D printed case is the logical solution, and indeed a quick search reveals many available online. But I have no experience with 3D printing, so could do with your advice.
Just wondering about people’s experiences with these. Any that are recommended for these v2.0.0 sensor units ? I see many for v1.2 sensors. Any that are to be avoided ? Any issues you found down the track ?
I can’t justifying purchasing a 3D printer (though I would love to), so experiences with online print places or local (I’m in Wollongong) printing places would be particularly helpful.
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Hey @Donald23173,
These extension cables would certainly work. The end of the supplied cable is compatible with dupoint or ‘prototyping’ wires. These are a standard component and usually used for breadboard testing. I would suggest having a look at the category page for this wire type. We have a fair few long cables like this 90cm pack of 10 which should do the trick to get to 1.8m.
Otherwise, this is the category page for these cables:
I have personally had some great experiences with Phaser 3D for 3D printing support although if you don’t mind having the cable fixed to the sensor, a big glob of hot glue would probably do a good enough job at water proofing it.
Hope this helps!
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