# Measurements are present for device, but the c8y\_SupportedSeries is returning empty json. Why?
**URL:** https://community.cumulocity.com/t/measurements-are-present-for-device-but-the-c8y-supportedseries-is-returning-empty-json-why/4430
**Category:** Forum
**Tags:** cumulocity
**Created:** [August 11, 2022, 1:54pm UTC](https://community.cumulocity.com/t/measurements-are-present-for-device-but-the-c8y-supportedseries-is-returning-empty-json-why/4430 "2022-08-11T13:54:54Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@sp00725748](https://community.cumulocity.com/u/sp00725748)
#### Post date: [August 11, 2022, 1:54pm UTC](https://community.cumulocity.com/t/measurements-are-present-for-device-but-the-c8y-supportedseries-is-returning-empty-json-why/4430/1 "2022-08-11T13:54:55Z")
#### What product/components do you use and which version/fix level are you on?
cumulocity
#### Is your question related to the free trail, or to a production (customer) instance?
customer license
#### What are you trying to achieve? Please describe in detail.
I have ingested some measurements data for a device. Once the measurements are ingested for any device I used to see the name of the Series names when I hit the managedobjects API for supported series for any devicId. But today, I have created a device, ingested some data for measurements by bulk ingestion. But the [https://dev.iot.solenis.com/inventory/managedObjects/deviceID/supportedSeries](https://dev.iot.solenis.com/inventory/managedObjects/deviceID/supportedSeries) API returns
{
“c8y\_SupportedSeries”:
}
Measurements are present for device, but the c8y\_SupportedSeries is returning empty json. Why? Please help is there any other issue that prevents the supported series from returning the list of series names.
#### Do you get any error messages? Please provide a **full error** message screenshot and log file.
#### Have you installed all the latest fixes of the products and systems you are using?
---
### Author:  [@Philipp\_Emmel](https://community.cumulocity.com/u/Philipp_Emmel)
#### Post date: [August 11, 2022, 2:39pm UTC](https://community.cumulocity.com/t/measurements-are-present-for-device-but-the-c8y-supportedseries-is-returning-empty-json-why/4430/2 "2022-08-11T14:39:03Z")
Can you give an example of a typical measurement for your device? Do these measurements follow the typical fragment-series-value data structure? (see: [https://cumulocity.com/api/10.13.0/#operation/postMeasurementCollectionResource](https://cumulocity.com/api/10.13.0/#operation/postMeasurementCollectionResource))
---
### Author:  [@sp00725748](https://community.cumulocity.com/u/sp00725748)
#### Post date: [August 11, 2022, 2:48pm UTC](https://community.cumulocity.com/t/measurements-are-present-for-device-but-the-c8y-supportedseries-is-returning-empty-json-why/4430/3 "2022-08-11T14:48:56Z")
Hi Philip,
thanks for replying. Of course below is the sample of my measurements clubbed for a specific time stamp and ingested in cumulocity.
“measurements”: [
{
“self”: “[https://t54905.iot.solenis.com/measurement/measurements/6279671](https://t54905.iot.solenis.com/measurement/measurements/6279671)”,
“time”: “2022-08-01T00:05:00.000Z”,
“id”: “6279671”,
“source”: {
“self”: “[https://t54905.iot.solenis.com/inventory/managedObjects/5160078](https://t54905.iot.solenis.com/inventory/managedObjects/5160078)”,
“id”: “5160078”
},
“type”: “sol\_onguardMeasurement”,
“Cond (S11)”: {
“unit”: “µS/cm”,
“value”: 4327
},
“ORP (S13)”: {
“unit”: “mV”,
“value”: 646
}
},
```
{
"self": "https://t54905.iot.solenis.com/measurement/measurements/6279672",
"time": "2022-08-01T00:10:00.000Z",
"id": "6279672",
"source": {
"self": "https://t54905.iot.solenis.com/inventory/managedObjects/5160078",
"id": "5160078"
},
"type": "sol_onguardMeasurement",
"Cond (S11)": {
"unit": "µS/cm",
"value": 4328
},
"ORP (S13)": {
"unit": "mV",
"value": 646
}
},
```
---
### Author:  [@Tristan\_Bastian](https://community.cumulocity.com/u/Tristan_Bastian)
#### Post date: [August 11, 2022, 3:35pm UTC](https://community.cumulocity.com/t/measurements-are-present-for-device-but-the-c8y-supportedseries-is-returning-empty-json-why/4430/4 "2022-08-11T15:35:53Z")
The datastructure you are using is not how Cumulocity would expect it to detect a series.
Try something like this instead:
```auto
{
"self":"https://t54905.iot.solenis.com/measurement/measurements/6279672",
"time":"2022-08-01T00:10:00.000Z",
"id":"6279672",
"source":{
"self":"https://t54905.iot.solenis.com/inventory/managedObjects/5160078",
"id":"5160078"
},
"type":"sol_onguardMeasurement",
"sol_onguardMeasurement":{
"Cond (S11)":{
"unit":"µS/cm",
"value":4328
},
"ORP (S13)":{
"unit":"mV",
"value":646
}
}
}
```
I guess ideally you would also get rid of spaces and specially characters within your attribute names, see: [Cumulocity IoT's domain model - Cumulocity IoT Guides](https://cumulocity.com/guides/concepts/domain-model/#naming-conventions-of-fragments)
---
### Author:  [@sp00725748](https://community.cumulocity.com/u/sp00725748)
#### Post date: [August 12, 2022, 2:09pm UTC](https://community.cumulocity.com/t/measurements-are-present-for-device-but-the-c8y-supportedseries-is-returning-empty-json-why/4430/5 "2022-08-12T14:09:46Z")
Hi Tristan,
Thank you for the help. I have done it. It worked as per the suggested structure.
Regard,
P. Sethu pandia raja
---
### Author:  [@system](https://community.cumulocity.com/u/system)
#### Post date: [February 8, 2023, 2:09pm UTC](https://community.cumulocity.com/t/measurements-are-present-for-device-but-the-c8y-supportedseries-is-returning-empty-json-why/4430/6 "2023-02-08T14:09:50Z")
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