Touch function not working

[HaViGit]

Hi Dustin. A while ago I bought your TouchDeck and it worked out of the box including touch control. I am now trying to install something else and have tested with ESP32_TouchDown_Drawing.ino and ESP32_TouchDown_Keyboard.ino. The sketches compile without errors and start up fine, but the touch function does not work. The touch library (https://github.com/DustinWatts/FT6236) is installed correctly so that shouldn't be a problem. Can you help me? Regards, Hans.

[DustinWatts]

Hi HaViGit!

I think you mean TouchDown, but that's ok I understand ;) Could you try it with the example from the FT6236 library called: simple_touch.ino? That is the most basic touch sketch/test there is.

Also have a look at the output of the serial monitor to see if any errors, show up. If you test it with the example I pointed you to above, also please post the output between the serial monitor (pay attention! That script still outputs serial data on 9600 so you might need to change it. This will be fixed in the new release)?

If you put the output of the serial monitor between thee back ticks (```) before the first line and the last line it will make it better readable, like this:

X Coordinate: 24
Y Coordinate: 267
X Coordinate: 24
Y Coordinate: 271
etc... 
etc... 
etc...

You could also check if the little 6 pin FPC connector still makes a good connection to the smaller FPC board, this is used for touch and might have some loose.

[HaViGit]

Thanks for your quick response. You are probably right with the correct name, I must have been mistaken. For me it's just a very nicely designed piece of hardware that I'm happy with ;-)

The sketch simple_touch.ino works and shows the coordinates in the serial monitor. So far so good... The sketch ESP32_TouchDown_Drawing.ino shows the text "Start touching to start drawing." on the display but there is no response to touch, neither on the display nor in the serial monitor. Same with ESP32_TouchDown_Keyboard.ino, the keyboard is shown but no output on the screen or in the serial monitor.

I've checked the connector, it seems fine but otherwise simple_touch.ino might not have worked either I think. Hopefully you have some suggestions.

[HaViGit]

Not sure if this is important but below the content of my current User_Setup.h file:

// ILI9488 using 4-wire SPI and using an FT6206 touch controller

#define USER_SETUP_ID 204

#define ILI9488_DRIVER

#define TFT_BL   32
#define TFT_BACKLIGHT_ON HIGH

#define TFT_MISO 19
#define TFT_MOSI 23
#define TFT_SCLK 18
#define TFT_CS   15
#define TFT_DC    2
#define TFT_RST   4

#define TOUCH_CS 21

#define LOAD_GLCD
#define LOAD_FONT2
#define LOAD_FONT4
#define LOAD_FONT6
#define LOAD_FONT7
#define LOAD_FONT8
#define LOAD_GFXFF

#define SMOOTH_FONT

#define SPI_FREQUENCY  27000000
#define SPI_READ_FREQUENCY  20000000
#define SPI_TOUCH_FREQUENCY  2500000

[DustinWatts]

Thanks for your quick response. You are probably right with the correct name, I must have been mistaken. For me it's just a very nicely designed piece of hardware that I'm happy with ;-)

The sketch simple_touch.ino works and shows the coordinates in the serial monitor. So far so good... The sketch ESP32_TouchDown_Drawing.ino shows the text "Start touching to start drawing." on the display but there is no response to touch, neither on the display nor in the serial monitor. Same with ESP32_TouchDown_Keyboard.ino, the keyboard is shown but no output on the screen or in the serial monitor.

I've checked the connector, it seems fine but otherwise simple_touch.ino might not have worked either I think. Hopefully you have some suggestions.

Since the example from the FT6236 library works, maybe some of my sketches broke. I will have to check the sketches and see if they work on my end.

BTW, the User_setup.h has nothing to do with the touch functions of the capacitive touch used on the ESP32 TouchDown. But it is good to post as much information as you can 😉

[LanceH14]

Hi Dustin, I was wondering if there is any movement on this issue. I seem to be at exactly the same place. I can compile and load the sketches, I get the graphics on screen, but response to touches. The simple example works.
I found I had to make some changes to LED Control code as it was obsolete. I have a TouchDown V1.1.

Thanks in advance, Lance.

[LanceH14]

Oops that should be NO response to touches!

[LanceH14]

Hi, I did a bit investigation. I found that if I did the tft setup commands before ts.begin it would 'see' the touches. The keyboard calibration is not very good, but it fundamentally works.