MicroPython on ESP32 with SPIRAM support

[OutoftheBOTS_]

I have left to go away on business when I get back home I will lift off the metal cover of the Wrover and see which component is getting hot.

Like I said the Lolin32 pro is no longer for sale on the wemos aliexpress shop.

I did see this similar board though https://www.aliexpress.com/item/TTGO-T8 ... autifyAB=5

[loboris]

On all boards with psRAM you must be carefull not to pull low the MTDI (GPIO12) pin.

On WROVER module the MTDI is internally pulled high, as the flash and SRAM in ESP32-WROVER only support a power
voltage of 1.8V (output by VDD_SDIO).

If you pull MTDI low at boot, the Flash chip and psRAM will be powered at 3.3V and can and probably will be damaged!

@OutoftheBOTS_
This board can be interesting as the Flash chip can be easily replaced with the 16MB one. But the power section is worse than on Lolin32 Pro, si it is not suitable for low power operation.

[demoontz]

i have this module:
https://www.aliexpress.com/item/Lolin-E ... autifyAB=1

16mb onboard. all works well but have problem with display, cant run i2c. (install dirver error)
the same problem with other wroom32 module

ps: how about chat in Telegram?

[cartere]

my lolin32 pro board seems to have died.

When I plug it in to my computer the recognizes the CP210 but the Wrover module starts to get very hot and I can't get any coms to it.

Has anyone else had this problem??

Also the Lolin32 pro seems to have disappeared from any seller does anyone know if it has gone out of production?? maybe there was a problem with it?

I too have had the problem, seems more of a mechanical issue (maybe with the usb connector). Plug in usb cable with finger on usb to serial chip if it starts heating quickly unplug cable and reinsert, usually works fine after that YRMV.

[cartere]

I'm using Lolin32 Pro for a week and had no problems.
I'm always configure it to run with Flash @80 MHz in QIO mode and psRAM @ 80MHz.

I'm also using ESP32-WROVER-KIT v3 for 6 months and had no problems with the same configuration.

loboris could you direct me where you set flash and psRAM speed? Assume menuconfig but will not let me select anything but 40MHz

[loboris]

@cartere

→ Serial flasher config → Flash SPI speed
→ Component config → ESP32-specific → SPI RAM config → Set RAM clock speed

RAM clock speed can be set to 80 MHZ only if Flash SPI speed is set to 80 MHz.

CONFIG_SPIRAM_SPEED:
Select the speed for the SPI RAM chip.
If SPI RAM is enabled, we only support three combinations of SPI speed mode we supported now:

1. Flash SPI running at 40Mhz and RAM SPI running at 40Mhz
2. Flash SPI running at 80Mhz and RAM SPI running at 40Mhz
3. Flash SPI running at 80Mhz and RAM SPI running at 80Mhz

Note: If the third mode(80Mhz+80Mhz) is enabled, the VSPI port will be occupied by the system.
Application code should never touch VSPI hardware in this case. The option to select
80MHz will only be visible if the flash SPI speed is also 80MHz. (ESPTOOLPY_FLASHFREQ_80M is true)

There is a help for each item in menuconfig, just press ? to get it.

[cartere]

Thanks loboris building now...............

[OutoftheBOTS_]

@cartere

My Lolin32 pro also had the problem of sometimes when plugging the usb lead cp210 chip would get very hot and i unplugged the usb lead then reserted and it worked fine without getting hot, this happens a fair bit. Maybe there is a problem with the cp210 chip that is causing the Wrover to fail??

[OutoftheBOTS_]

@laboris

Note: If the third mode(80Mhz+80Mhz) is enabled, the VSPI port will be occupied by the system.
Application code should never touch VSPI hardware in this case. The option to select
80MHz will only be visible if the flash SPI speed is also 80MHz. (ESPTOOLPY_FLASHFREQ_80M is true)

VSPI is not normally used in application, is this correct??

It is HSPI that would normally be used in applications, is this correct??

Choosing the 80Mhz+80Mhz won't affect your fast SPI TFT module??

[cartere]

laboris trying to figure out curl, sendmail works with no issues, ftp works with your test server but not local using FileZilla. Do you have any suggestions for a server? Any setup recommendations for FileZilla server? Ftp port is open and I see a successful login but then things hang.