Cor-Jan Holwerda
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Cor-Jan Holwerda heeft een bericht gemaakt,
Can I manually adjust the order of the lines displayed in a graph
BeantwoordI would like to adjust the order of data lines that are displayed in a graph. Is it possible to adjust this?
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Cor-Jan Holwerda heeft een bericht gemaakt,
How can we have backups of the stored information of all the sensors?
The 30MHz platform always need the 30MHz cloud infrastructure, so data will always be send to our cloud (AWS), via the API the customer can retrieve the data real-time and send it to their own serv...
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Cor-Jan Holwerda heeft een bericht gemaakt,
In case of losing connectivity to the network, do the devices have some memory to be transferred later when the connection is restored?
At this moment we do not store data locally on the gateway and or sensor. So if the Internet connection is not there, no data is collected. We are working on the functionality to have limited stora...
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Cor-Jan Holwerda heeft een bericht gemaakt,
Creating accurate sensors for agriculture
We have built all parts of the 30MHz platform ourselves. From the underlying cloud structure, the data platform with all analysis and consultation options, up to the sensor system that provides for...
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Cor-Jan Holwerda heeft een bericht gemaakt,
sap flow sensor and stem thickness sensor
Growers monitoring their crops with 30MHz technology can add two new metrics to their overview: sap flow and stem diameter. 30MHz has partnered with Dutch agtech company 2Grow, and we’re excited to...
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Cor-Jan Holwerda heeft een bericht gemaakt,
My ECw seems to be quite off for my substrate sensor
ECw is a calculation heavily depending on VWC and ECb, if any of them is not fit with the calibration profile ECw will be off. If the ECw is off it is best to look at the trend of ECb on the same l...
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Cor-Jan Holwerda heeft een bericht gemaakt,
What is the difference between ECb and ECw values for my substrate sensor?
ECb (bulk) is the Electrical conductivity the sensor senses inside the material (hence bulk). ECp (pore) is a calculation of the expected Electrical Conductivity of the water when it is extracted f...
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Cor-Jan Holwerda heeft een bericht gemaakt,
Is the substrate sensor temperature compensated. I see ECw change with temperature.
Yes the sensor is temperature compensated. However, the ECw calculation is very sensitive to temperature and should ideally be done at room temperature.
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Cor-Jan Holwerda heeft een bericht gemaakt,
Can I put multiple soil / substrate sensors in one slab?
The sensors can interfere with each other. However, the measurement duration is very short and therefore the change of interference is small. In practice, we didn't see issues when placing 2 or 3 s...
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Cor-Jan Holwerda heeft een bericht gemaakt,
I put the sensor (substrate / soil) in a bucket of water and the VWC/ECW/Temperature reading are off.
The sensor can only be tested inside the correct soil media. We have calibration profiles for VWC. ECw is a calculation heavily depending on VWC and ECb, if any of them is not fit with the calibrat...