WebSocket disconnects on large payload WStype_TEXT

[blackcoffeexbt]

WebSocket disconnects on large payload WStype_TEXT

[Links2004]

this is the defined limit, you can increase it, but its there for a reason ;)

arduinoWebSockets/src/WebSockets.h

Line 66 in 93707d4

#define WEBSOCKETS_MAX_DATA_SIZE (15 * 1024)

if you send a loot of big frames like this you can easily run out of RAM / heap.

for sending big chunks of data its better to use the fragmentation.
any typical TCP/IP network and the ESP network stack can not handle 16k frames (mtu) any way.

which as a result mean that you dont lose anything if you do the fragmentation on the "date input" side.

[blackcoffeexbt]

Thanks for the reply. By fragmentation, do you mean splitting the payload into multiple messages on the sender side or something else? Unfortunately, I'm working with a protocol spec that doesn't include this ability and some messages can be very large. I'll bump the max data size and do some testing.

Thanks again and thanks for the work on this lib :)

[Links2004]

If the max size change works for you then its fine.
the websocket protokoll has support for fragmentation but not all servers support it.
as a result its currently not exposed in the lib.

whats needed for using the WS fragmentation is sendFrame calles with

arduinoWebSockets/src/WebSockets.h

Lines 255 to 258 in 93707d4

	WStype_FRAGMENT_TEXT_START,
	WStype_FRAGMENT_BIN_START,
	WStype_FRAGMENT,
	WStype_FRAGMENT_FIN,

e.g.

• WStype_FRAGMENT_TEXT_START
• WStype_FRAGMENT (repeate as needed)
• WStype_FRAGMENT_FIN

[blackcoffeexbt]

This is great. Thanks for the help :)