Hi, what type of board are you using?
I assume that you are using a board with a USB <-> Serial converter, it's right?
If yes then you need a terminal emulator software like putty https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html to enstabilish the connection on the PC side.
On the esp ...

Hi everyone, in theese days I'm trying to talk over i2c to a bno 055 produced by Bosch.
The problem in getting it work with ESP32 is that the bno 055 use clock-stretching that make ESP32 to go into timeout as i2c master also at 10kHz.
Checking the communication with Pulseview I've noticed that the ...

Problem persist, but I haven't find a solition. Can anyone help me?

After a lot of time and hours at work I was able to find the time for modify the code as suggested.
The function object of the modify is the SPI_Writethat i report below

Old function:

void IRAM_ATTR SPI_Write(uint8_t value, EPDDriverParams_t *driver)
{
esp_err_t ret;

spi_device_handle_t disp ...

That's a strange thing... I see you're using the polling transmit function, does it also does that if you use the 'normal' SPI transmit function?

Thanks for the fast response, I don't know, I'll try in this week to change from polling to interrupt.
After the test I'll post the results.

Hi to all, I'm new to the forum and I'm working on ESP32 for around one year.
In this days I started to work with the 2.9" EPaper Display (EPD) from Waveshare https://www.waveshare.com/wiki/2.9inch_e-Paper_Module_(B) , it's an interesting SPI Screen with 3 color (Black White and Red) after some ...