MicroPython Forum (Archive)

Hi;

What is the buffer size on the esp32 uart, it seems to be very small, somewhere around 260 bytes.

I am reading data from a GSM device and re loosing a whole chunk out of the middle of the data when reading the message list.

Any reason why this buffer could not be made user-configurable ?

I appreciate this doesn't answer your question but I've been using the uasyncio StreamReader class. I tested this by running simultaneous UART I/O over a loopback with long line lengths. On the Pyboard the readline method can fail if the line length is longer than the buffer size and I was expecting to see the same on the ESP32. But I couldn't break it

So in the absence of a fix you might like to try this approach. There is some sample code in my uasyncio tutorial.