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DevHeads IoT Integration Server•2y ago•

4 replies

wafa_ath

Help Needed: Handling Serialized Data with Escaped Characters in Paho MQTT/Packet Library

I need a little help. @Middleware & OS I'm using the library called

paho mqtt/packet

paho mqtt/packet

. The example provided with it performs serialization of the data that needs to be sent and then sends it over TCP just like that. I have written the code for the ESP, and it works fine without any issues. However, when I serialize the data, it looks like this (as seen in the debugger):

\020\016\0\004MQTT\004\002\0\024\0\002me

\020\016\0\004MQTT\004\002\0\024\0\002me

The driver I wrote treats these escapes as the end of the string, so it doesn't see anything and doesn't send anything. Is this format normal? I mean, is the packet supposed to look like this? And if this is the normal format, how can I deal with these escapes?

Here's the code and the shape of the array before sending:

Solution

you are right, I hadn't initialized it. I have added

memset(buf, 0, 200);

memset(buf, 0, 200);

to my code, but I'm still facing the same issue with the serialized data being interpreted incorrectly ...

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