Python send complex data (i.e GPS location) to Azure IoT Central

Question

Python send complex data (i.e GPS location) to Azure IoT Central

Vicky Tran 1

Hi,

I am new to Azure and Python.

I am trying to send data from Raspberry Pi to Azure IoT Central. I am not sure how to structure the message to send GPS location (location semantic type, Geopoint schema) to Azure IoT Central to use in map (telemetry) using Python sdk.

It would be great if there is a Python sample code for this.

Thanks in advance.

Regards,

Vicky

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Answer 1

Dominic 1,706 Microsoft Employee

This Python sample shows how to send telemetry to IoT Central: https://github.com/Azure/azure-iot-sdk-python/blob/main/azure-iot-device/samples/pnp/simple_thermostat.py.

Line 310 sends a simple telemetry type. To send a complex type replace the JSON with that shown in the previous answer from Roman.

For more information about message structures, take a look at: https://learn.microsoft.com/azure/iot-central/core/concepts-telemetry-properties-commands

Vicky Tran 1 Reputation point

2022-02-22T12:42:07.347+00:00

Thanks Dominic, Roman and Sander for your help.
Sander van de Velde | MVP 37,066 Reputation points MVP

2022-02-23T00:28:31.063+00:00

Hello @Vicky Tran ,

If the response helped, do "Accept Answer". By doing so, it will benefit all community members who are having this similar issue/question.

Answer 2

Roman Kiss 2,246

Hi Vicky,

the following example shows a Raw data for this telemetry data:

where a location is declared as the following:

Thanks
Roman

Vicky Tran 1 Reputation point

2022-02-17T11:13:37.567+00:00

Hi Roman,

Thank you so much for you quick reply. Would you be able to provide an example how to build the message from the device (i.e raspberry pi) using azure-iot-sdk-python (https://github.com/Azure/azure-iot-sdk-python-preview/blob/master/azure-iot-device/samples/simple_send_message.py) to send to azure to get the raw data as shown in your screenshot? Assuming that we have gps data (lon, lat, alt) available.

I am new to Python and Azure IoT so any help would be appreciated.

Thank you.

Regards,

Vicky
Sander van de Velde | MVP 37,066 Reputation points MVP

2022-02-17T21:16:53.423+00:00
Hello

Check out this Python example which is a bit more elaborate.

It shows how to pass a JSON object.

It also shows how to pass the device template identification like:

model_id = "dtmi:com:example:NonExistingController;1"

Because you are new to Python, here is a blog post explaining the code.

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Python send complex data (i.e GPS location) to Azure IoT Central

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