Lolin D32 Pro Flashing

[eboston]

Does anyone have any suggestion on how to program this board? The programmer never connects. I have tried pressing the reset button while the programmer tries to connect, but no luck. I'm thinking I got a bad unit because almost all ESP32 boards I have used in the past have the led flash program on it. This one didn't flash the LED.

So before I send it back, just wanted to see if anyone new any tricks for it.

[fvanroie]

What tool are you using to flash the board? No pressing should be required as this is typically done automatically via the Serial port.
The button is for resetting the board, i.e. when it hangs or you want to manually restart it.

I hardly ever touch the ESP during the flashing, as the upload tool does that. Granted not all boards have this feature, the Lolin D32 Pro V2 does.

On Windows you can use Tasmota-PyFlasher, a simple GUI tool for flashing ESP32 firmware without any installation.

[eboston]

I have tried Tasmota-PyFlasher, NodeMCU PyFlasher, and PlatformIO. They all have the same problem. The board shows up as a plain USB Serial Port where my other boards report as USB-SERIAL CH320 or something to that nature.

[fvanroie]

Sounds like the CH340C driver is missing on your system. Try installing it first.

[RiggsUS]

I don't know if I'm not lookin in the right place but I was looking at https://github.com/HASwitchPlate/openHASP/releases for the LOLIN D32 Pro but did not see a bin for it. I have compiled it with vscode but I just thought I would be lazy and try a precompiled one.

[fvanroie]

You are right, thanks for letting us know. Since it is a recommended configuration, I have added lolin-d32-pro_ili9341 to the build-script.
It will be built automatically on each commit and with the next release it will be included by default.

[wolffman122]

So I am running into an issue just a white screen but I can get into the web interface. I have a lolin-d32-pro and the screen is this one Screen. I followed the guide here video for wiring, what do I have to change in the build to make this work? I flashed lolin-d32-pro_ili9341_full_16MB_v0.6.2.bin and tried making a custom bin the instructions here. Not sure if did this write either never used platformio before.

[fvanroie]

You can't unless you compile a custom firmware with custom driver/pins.
You'll need to rewire the pins to use the FreeTouchDeck firmware on the Lolin D32 Pro... or create a custom binary.

[wolffman122]

So I go images on the screen. My one issue is touch now. From the screen I have the T_CS pin connected to pin 21 on the board. Is there any of the other touch pins on the screen that I need to connect to get touch working?

[fvanroie]

Great! You need to connect 4 wires to the Touch pins to have SPI communications:

TFT	Label	Lolin	Function
10	T_CLK	18	Touch SPI bus clock signal
11	T_CS	21	Touch screen chip select signal, low level enable
12	T_DIN	23	Touch SPI bus input
13	T_DO	19	Touch SPI bus output

SPI MISO, MOSI and SCLK are shared between the touch controller and the LCD controller.
T_IRQ does not need to be connected as it is not used in openHASP.

[wolffman122]

I Hate to bring up a dead horse, I figured out my problem with my older ILI9488 didn't have a touch chip on it. Now I got a new ILI9341 with a touch chip and wanted to get a full list of PIN's for screen and touch but haven't been able to find it. I flashed the lolin-d32-pro-ili9341_full bin file.

[fvanroie]

The lolin-d32-pro-ili9341 firmware has these pins configured:

MSP2402 Pin	Function	Lolin Pin	Config Name	Display Pin
1	5V/3.3V power input	5V/3.3V		VCC
2	Module Ground	GND		GND
3	Chip Select	GPIO14	TFT_CS	CS
4	LCD Reset line	GPIO33	TFT_RST	RESET
5	Data Command control	GPIO27	TFT_DC	DC
6	Data Input	GPIO23	TFT_MOSI	SDI(MOSI)
7	SPI Clock	GPIO18	TFT_SCLK	SCK
8	Backlight	GPIO32	TFT_BCKL	LED
9	Data Output (not used)	GPIO19 or N/C	TFT_MISO	SDO(MISO)
10	Touch SPI Clock	GPIO18	TFT_SCLK	T_CLK
11	Touch Select	GPIO12	TOUCH_CS	T_CS
12	Touch Data Input	GPIO23	TFT_MOSI	T_DIN
13	Touch Data Output	GPIO19	TFT_MISO	T_DO
14	Touch Interrupt	N/C		T_IRQ