Is it possible to increase the serial buffer size?

[rickkas7]

The buffer size cannot be changed, but this library allows you to use a larger buffer:

Particle Serial Interrupt

I published a library to do that. It’s a thread-based serial port buffer. You can choose the size of the buffer and read from it using the same methods you’d normally use for the hardware serial port. With a 4K buffer I was able to send data to a Photon continuously at 230400 without dropping a single byte.