ESP32 Baud Rate

Projects General Guidance
1

I'm currently utilizing an ESP32-Wroom-32 board in conjunction with a PN5180 to read tags. Through my research, I've discovered that the default baud rate for communication is 115200. Could increasing the baud rate beyond the default value affect the performance of the board, particularly in the context of reading tags with the PN5180?

Additionally, are there any considerations or limitations I should be aware of before making such adjustments? I have also encountered information suggesting that cable length could potentially impact performance depending on the chosen baud rate. Given that the cable I'm using is 5 meters long, is this true in this scenario?

2

Since all PN5180 devices use SPI for communications, you must actually have something else. Perhaps a link to documentation for your actual device would help.

3

Here you go, the documentation for my device.

PN5180 Documentation

4

There is also a usb-to-serial chip on your ESP32 board, it is not just the ESP32.
When searching online, there are mixed messages. Some use "921600" all the time, but others have problems about 500k, and in theory it could be above 1M.
Some ESP32 boards are noisy and can benefit from extra capacitors for the 5V and the 3.3V. Use also a good USB cable.

It has no influence on the performance of the board.

Can you check the 5V and 3.3V pins of the ESP32 module when starting a sketch ? Is the 5 meter USB cable the only way to power the ESP32 ?

5

For what I'm doing a long cable is absolutely necessary so I was worried about it. I have no issues with noise on my board so I dont think the extra capacitors could benefit me.

Sorry but I didn't understand this part of your question "Can you check the 5V and 3.3V pins of the ESP32 module when starting a sketch ".

6

Is that 5 meters USB or 5 meters TTL. Although I'm not 100% sure, I do not think that the baudrate has a relationship with the USB communication.

7

Its a 5m USB-C cable, it probably doesn't affect performance and in the large scale of things a 5 meter cable is not that long.

8

Same as I found. That is for the chip itself, which does not have a serial interface.

9

Sorry, my question was indeed not very clear. I meant that during the begin of the sketch, the ESP32 is busy to connect to WiFi, which draws current. If the 5V pin of the board drops to 4V and the 3.3V drops to 3.2V, then it could be a problem.
The ESP32 draws peaks of current, which can not be measured with a multimeter. But at least the 3.3V should stay at 3.3V.