PMOD ESP32 SPI mode

[ennegi]

Hi all,

We are doing a project using the Microzed Carrier board (https://it.farnell.com/avnet/aes-arduino-cc-g/microzed-carrier-card-kit/dp/2915532). We are using PMOD ESP32 Module and we need to use it in SPI Mode (we bought on Mouser here: https://www.mouser.it/ProductDetail/Digilent/410-377?qs=gTYE2QTfZfRwGlGs0Q3k0w%3D%3D ). We are able to use UART mode correctly (AT Protocol), but when we switch to SPI module, the AT protocol doesn't work (we don't receive any response from your module).

Do you have any examples of this module working in SPI mode? Thanks a lot!

[JColvin]

Hi @ennegi,

I apologize for the delay.

My understanding based on the ESP32 reference manual, https://reference.digilentinc.com/reference/pmod/pmodesp32/reference-manual, is that the program loaded on it is AT Instruction Firmware, which is set up in slave mode that sets the top row of pins to UART. To use the pins as a SPI header, you would need to load custom firmware that makes use of this SPI header. Updating this firmware is somewhat described on this ESP32 forum thread here: https://esp32.com/viewtopic.php?t=5136. Digilent doesn't have any custom firmware that we have created for the module.

Let me know if you have any questions about this.

Thanks,
JColvin