Azure IoT Device Client, How Much Buffered Data in day or sending 1 request ?

Question

I had observe some of the scenarios while testing with Azure IoT, Please help me on this also.

Question 1 : What will happened when i will send single message more than 256KB size from Device to Cloud using Azure IoT ?

Question 2 : If as per limit 256KB sending data in single message than with in 24 hour i could send more than 300 MB data which could be more than the limit of 24 hours, Please elaborate. how does it works

Question 3 : Please let me know limit of sending the data because i have bulk data to send from device (example 1 GB/day) ?

Answer 1

Hello @RAI Vipin ,

Azure IoT messages have a maximum size of 256KB.

If messages are larger, you will receive an (IoT Hub) exception from the (C#) SDK:

Azure IoT Hub supports file upload for non-edge devices. This is a good alternative for large messages.

Depending on the tier and units, you can send a number of messages aka chunks.

For example, in the S1 tier, 1 unit supports up to 400.000 messages per day.

If you send a message of size 7KB, this will be counted as 2 chunks (2 times 4 KB makes 8 KB).

If you reach the daily limitation earlier, say within 22 hours, the service will be blocked for 2 more hours.

On the next day, ingestion will start again.

So, if you want to send more data, as messages, you need to scale up to say 4 units (if your calculations are based on 1 unit).

Or, you should redesign your architecture and check out eg. file upload and compression (compression is a useful addition to IoT messages).

----------

If the response helped, do "Accept Answer". If it doesn't work, please let us know the progress. By doing so, all community members who have a similar issue will benefit. Your contribution is highly appreciated.