Sending two sets of data in the same connection about arduinowebsockets

[gilmaimon]

This is more of a general programming queshtion, but I am happy to try and help.

Your solution is fine, but it will be a bit hard to extend in the future.

The Websockets protocol defined 2 types of data messages: Binary and Text (UTF8). You could look up the docs on the library you are using on the PC and check what is the method name that checks if a message is binary or text.

A more general approach, is to define some kind of protocol of your own. For example, you could say that before every message you send a text messages that represent the type of data being sent next. For example, Esp code:

if(...) {
   client.send("DETECTION");
   client.sendBinary("Face Detected");
}
client.send("IMAGE");
client.sendBinary((const char *)_jpg_buf, _jpg_buf_len);

Then, on the other side you will accept a message, and use switch or if-elses to act depending on the data you know you are about to get next.

This protocol is not very slim or efficient, but you can apply the general concept however you like :)

Btw, is sending the images working well for you?

[xgarb]

Thanks for the advice. Sending images seems to work well at lower resolutions but the WiFi disconnects on the ESP at high resolutions. I'm going to do more testing on streaming the camera output using websockets vs the JPEG HTTP Stream method used here: https://github.com/espressif/esp32-camera/tree/master

[gilmaimon]

Interesting. You can try using streaming with this library. See this https://github.com/gilmaimon/TinyWebsockets/wiki/Client#Streaming---Sending-Fragmented-Messages

[gilmaimon]

Hi, can I close the issue?

[xgarb]

I'm working on another project that I want to test with this library as an alternative. Hopefully today!