Tnx! I will give it a try and let you know!
I do like experimenting, but was a bit confused with the different names and pin desciptions and of course it is good to know that it is not likely that something will be broken.
@zoogara
YES!!
Finally I did succeed with your help!
I have used an esp32 S2 mini with the pin last numbers you have given.
First I had a problem that I was not able to do the initial flash on the S2 mini but it turns out, esphome has problems with flashing this board.
Now I did the first flashing with:
Adafruit esp tool
I am so happy! Tnx!
Now I have to try touchscreen and than I can start designing my display layout!
Next challenge is to get the touchscreen working.
At the moment it does not workā¦ I thinkā¦
Should I be able to see in the log when the touchscreen has been triggered?
Have a read in the touchscreen component about calibration. There is an example of printing the raw data - which can be handy for testing:
touchscreen:
platform: xpt2046
id: my_touchscreen
cs_pin: 17
on_touch:
- lambda: |-
ESP_LOGI("cal", "x=%d, y=%d, x_raw=%d, y_raw=%0d",
id(my_touchscreen).x,
id(my_touchscreen).y,
id(my_touchscreen).x_raw,
id(my_touchscreen).y_raw
);
Also - I couldnāt find anywhere in the page for the display mention of what touchscreen controller is in use. It may be a different oneā¦
Oh, sorry, I did not mention! The touchscreen chip on the display board shows āxpt2046ā so that should be alright!
I did see the page about xpt2046 calibration, but have to look how I get this test to work.
I will let you know!
A question - did the display come with a little plastic pen? If it didnāt it may be a capacitive touch displayā¦
EDIT - already answered
You could also try:
- a different pin for touch CS
- connecting the display MISO to the touch MISO - there was some weird note about LCD MISO in the reviews
To be sure, do I read the calibration values in the log of the esphome instance:
I could also try your other suggestions.
You mean I can connect the unconnected SDO (MISO) to the display MISO pin 37 (so both are using the same pin 37?)
Yes
As a last resort. None of my displays have needed it.
I do see a lot of repeating log entries, but if I am right, you mentioned this also in another post and it is related to larger screens and not a problem?
I tried another pin for CS and combined the both MISO pins, but still no luckā¦ I may need to take some more time and check all the connections (maybe I was mistaken somewhere or maybe one of the breadboard pins did not contact very well)
By the way, what is the reason you did not connect the ā9 SDO (MISO) LCD SPI display bus data input and outputā in the first place? In some other schemes it is connected to its own pin on the esp boardā¦
I still do not get the coordinates with the test code for the touch panel.
I have tried the touch cs on different pins (and changed the code according to it), but no result in the logsā¦
If I pull out the wire to de touch cs, then there appears one line with coordinatesā¦ but of course it is no reaction to a touch on the screen, but onlys by unplugging the wireā¦
The screen does not output any data, itās purely taking input from the esp.
This is a resistive touch screen. Some of mine arenāt very sensitive, best results are with a stylus.
But if I run the testcode en touch the screen, the touchscreen part is read and the coordinates of the must be visible in the logscreen of the laptop, where I am running Home Assistant and esphome?
I still have no luck, even when using the stylus, even when touching a little more firmly or longerā¦
In the meantime I have done some other experiments. I am able to let the code change to another page, every few secondsā¦
But I would like to change the page by touching a butting, so I will keep trying!
I appreciate your (quick) help! With your help, I have my first visible things on the display
One last thing to try - what happens if you remove the SPI bus connections to the display but leave the touch screen connected?
Here is a sample wiring diagram that shows the connections on an ESP32. Apart from PIN numbers you can see it matches yourās.
You did buy the touch screen version though? The boards are exactly the same (including screen printing XPT2046) but the touchscreen chip is not soldered on.
Yes plus CS. Donāt forget to comment out the display code.
It is the display with touchscreen, on the image below you can see the touchscreen chip:
And it is the XPT2046:
And this is the esp32 S2 mini:
Sorry to say I am out of ideas.
Now that you understand the display connections and how a shared SPI bus works you could try some Arduino examples.
You could also try OpenHASP which will run with that display on your other ESP32.
That will confirm if itās an issue with ESPHome or something else.