Don't work message routing

Question

I added "$body.productId = 'MT3620'" message routing, But it don't work.

If message query is "true", all messages routing fine.

Answer 1

Based on the doc the message must have the following properties:

1. Content type = "application/json"

2. Content encoding = "utf-8"

Thanks

Roman

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Answer 2

Thanks for your support!

Added code:

IoTHubMessage_SetContentEncodingSystemProperty(_MessageHandle, "utf-8");
IoTHubMessage_SetContentTypeSystemProperty(_MessageHandle, "application%2fjson");