TTGO T8 V1.1

[scribblrsam]

Is it possible to use this board with openHASP?

I want to try openHASP and can get this board and an MSP touch screen delivered pretty quickly. Looking at the pins required for the MSP display here and the pinout here it seems that the board doesn't have pin 17 available.

I assume it is possible to override this and have seen the GPIO template inuser_config_override-template.h but cant find any docs about how this works.

Thanks

[fvanroie]

The default pin configuration is based on the user_setups\esp32\d1-mini-esp32_ili9341 build.
Indeed, on dev boards with PSram GPIO16 and GPIO17 are not available because they are used by the PSram chip.

You can most likely use the lolin-d32-pro_ili9341 configuration, since that board also has PSram. But the TTGO only has 4MB flash... that needs to be adjusted in the ini file too.

It defines the same SPI pins but uses 5 different control pins:

    ;-D TFT_DC=27   ; Defined by board, don't redefine !!
    ;-D TFT_CS=14   ; Defined by board, don't redefine !!
    ;-D TFT_RST=33  ; Defined by board, don't redefine !!
    -D TFT_BCKL=32  ; Configurable via web UI (default 32)
    -D TOUCH_CS=12  ; Default for TFT connector

So replace these 5 GPIO's in the ESP32 Pin column and you should be good to go!

Note: Leave SDO(MISO) of the display unconnected!

To build this configuration, you can use Visual Studio Code or Gitpod. In both cases you need to copy and edit the platformio_override.ini file from the template to enable the ESP32 environment(s) you want.

[fvanroie]

The custom configuration might look something like this in platform_override.ini:

Add the my_custom_build to extra_default_envs :

;region -- Default Build Environments : Used when Build All ---
extra_default_envs =
    ; Uncomment specific environments or create extra:
    my_custom_build
;endregion

Then replace the [env:my_custom_build] section with:

;region -- Custom Environment configuration example -----------------
[env:my_custom_build]
extends = esp32
board = esp32dev

build_flags =
    ${env.build_flags}
    ${esp32.build_flags}
    ${esp32.ps_ram}
    -D HASP_MODEL="Custom TTGO T8 ILI9341"

;region -- TFT_eSPI build options ------------------------
    ${lcd.lolin24}
    ${esp32.vspi}        ; Use VSPI hardware SPI bus
    -D USE_TFT_ESPI
    -D TFT_DC=27  
    -D TFT_CS=14  
    -D TFT_RST=33 
    -D TFT_BCKL=32  ; Configurable via web UI (default 32)
    -D TOUCH_CS=12
;endregion

;region -- Library options -------------------------------
lib_deps =
    ${env.lib_deps}
    ${esp32.lib_deps}

lib_ignore =
    ${env.lib_ignore}
    ${esp32.lib_ignore}
;endregion

[scribblrsam]

@fvanroie - That's brilliant!! Thanks for the quick and detailed response.

[nagyrobi]

Please confirm if it's working for you or not, we might add it to the compatibility list.

[scribblrsam]

I ended up getting an M5Stack to test. Will try this soon hopefully and let you know.