ESP8266 Community Forum

- Mon Jul 11, 2016 12:37 pm #50587 Trying to find a way to increase the buffer side for a UDP receive to be greater than 1460 bytes.

Anyone know if this is possible?

Currently working in C directly with the SDK.

- Mon Jul 11, 2016 4:09 pm #50600 that is the maximum packet size that will go through the network so NO you can not increase that.

Async HTTP and WebSocket Server for ESP8266
Async TCP Library for ESP8266
ESP8266 Exception Stack Trace Decoder

- Mon Jul 11, 2016 6:04 pm #50611 I thought the max packet size was 2^16?
https://en.wikipedia.org/wiki/User_Datagram_Protocol

- Mon Jul 11, 2016 8:22 pm #50615 That is true if using Jumbo_frame (even in TCP) :
https://en.wikipedia.org/wiki/Jumbo_frame
But this is not default with plain Ethernet_frame, which is the default on almost any OS.
https://en.wikipedia.org/wiki/Ethernet_frame
Even if ESP SDK would allows to change the MTU, I bet you would get into troubles with other PCs or other Devices on your network if MTU isn't matching there too.
You're better to stick with standards and send multiple packets.