Cor-Jan Holwerda
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Activity overview
Latest activity by Cor-Jan Holwerda-
Cor-Jan Holwerda created a post,
Can I manually adjust the order of the lines displayed in a graph
AnsweredI 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 created a post,
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 created a post,
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 created a post,
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 created a post,
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 created a post,
I tried out the api via the Swagger page but somehow it seems that I do not have rights
Unfortunately Swagger doesn't work (we only use it as documentation) because you need to pass the Authorization header and there is no way to include it. You can use Postman, curl or any other tool...
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Cor-Jan Holwerda created a post,
How can I retrieve sensor data for a given interval?
For example, to get the average values per hour for the past 24 hours make a GET request to https://api.30mhz.com/api/stats/check/<checkID>/interval/1d?intervalSize=1h&statisticType=averages Sw...
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Cor-Jan Holwerda created a post,
How can I retrieve sensor data between 2 dates?
To get a single sensors values from startDate to endDate make a GET request to https://api.30mhz.com/api/stats/check/{checkId}/from/{startDate}/until/{endDate}Swagger documentation To get multipl...
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Cor-Jan Holwerda created a post,
How can I retrieve the latest sensor values?
To retrieve sensor data you first need the checkId of the sensor. To get the latest value for a single check make a GET request to https://api.30mhz.com/api/stats/check/{checkId} To get the...
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Cor-Jan Holwerda created a post,
How can I get the units for a metric
Make a GET request to https://api.30mhz.com/api/metric/<metricID> (Swagger) The response will include a unit field E.g unit: "°C"