High Speed UART Serial Communication?

[jmprice50]

Hello.
The Arduino Serial class supports baud rates up to 460800.
I noticed in the Espressif documentation that and ESP32 processor is capable of UART communication speeds of up to 5MBS.
Has anyone experience working with higher baud rates for these processors?
Thanks!
Regards.

[Paul_KD7HB]

Remember, those are instantaneous Baud rates, not sustainable Baud rates. If you intend to communicate, you must pick a Baud rate that will work with the equipment and software that you use.

[gfvalvo]

@jmprice50

Has anyone experience working with higher baud rates for these processors?

I've used ~2Mbaud on ESP32 and Teensy 3.6 without issues.

[jmprice50]

thanks, gfvalvo.
Did you use IDF, or the Arduino Serial class? Thanks for the reply!

[jmprice50]

Paul_KD&HB,
True that! -- My app is closer to 2MBS.

[westfw]

@jmprice50

The Arduino Serial class supports baud rates up to 460800.

Says what?
AVR will support 500k and 1M, but 460800 will be well out of spec.

[gilshultz]

That is a bunch of data to be moving, be sure both ends can process it in the required time or less. Software poorly written will kill the project.

[gfvalvo]

@jmprice50

thanks, gfvalvo.
Did you use IDF, or the Arduino Serial class?

I wrote a driver for the RFbeam Distance Sensor Radar. It worked up to 2Mbaud (maximum rate for the sensor) using the ESP32's HardwareSerial (Arduino) APIs. I did increase the RX buffer size to 2500 bytes because of the large amount of data the sensor can spit out.