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Issue with LVGL 3.3

Q&A Forum › Category: ESP32 › Issue with LVGL 3.3
0 Vote Up Vote Down
Mark Weir asked 10 months ago

Hi Guys,
Absolutely loving the new e-book. Working on 3.3Display Sensor Data on a table. Code loads and display comes up but no luminosity or scrolling action to display time/date/ipaddress.
All previous examples working perfectly
Any thoughts?  Cheers  Mark

Question Tags: LVGL
7 Answers
0 Vote Up Vote Down
Sara Santos Staff answered 10 months ago

Hi.
That’s weird…
What is exactly the display that you’re using?
Are you connecting the BME280 sensor correctly? It might be something related to insufficient power supply.
I think it must be something related to the BME280 not being connected properly.
 
Regards,
Sara

0 Vote Up Vote Down
Mark Weir answered 10 months ago

Hi Sara, Thanks for your reply I have reloaded the code. I have checked the wiring etc. and I am using a genuine CYD module. Every other example works perfectly. I tried to insert a photo but can’t see how to do it. The fact that most of the app works its just the screen scrolling that doesn’t suggests a problem in the code. I noticed that all the data prints to the serial port including time, date etc.
I will try a second CYD module in case there is a problem with the one I am using but I doubt it.  
Cheers  Mark

0 Vote Up Vote Down
Sara Santos Staff answered 10 months ago

Weird…
Are you sure you’re connecting the BME280 to the right connector? Because GPIO 21, that is on the other connector, is also used to control the backlight.
 
Or maybe your board has a slightly different pinout??
 
Regard,s
Sara

0 Vote Up Vote Down
Mark Weir answered 10 months ago

Hi Sara
I am using Pin 22 and Pin 27 for the i2c as per instructions. I am not getting a luminosity reading either. I have now tried 2 different CYD modules and many of the other examples with total success. 
The only code changes I have made were to add my WiFi credentials and timezone. I am in New Zealand so timezone is Pacific Auckland. As I have said the data from the api is correct and prints on the serial monitor. It seems like it is just the slider that is not working. 
I will keep working at it as I am sure your code is correct and tested. There must me something I have missed or accidentally changed. 

I will keep you updated 
cheers Mark

0 Vote Up Vote Down
Sara Santos Staff answered 10 months ago

Ok.
When it comes to the LDR, in one of my boards, it was not properly connected and it only worked when we pressed it with our finger.
Maybe yours is also not connected properly…
 
As for the issue with scrolling, I have no idea what might be causing the issue :/
 
You have to try other examples with tables and see if you get the scrolling feature working…
Regards,
Sara

0 Vote Up Vote Down
Mark Weir answered 10 months ago

Hi Sara
Success! It was my misunderstanding sorry. 
I was trying to use my screen tool to drag the screen. 
Once I realised and used my finger to drag the screen all was well. This is a fantastic Ebook. One of the best so far. 
Thanks for your patience working through this. 
Cheers Mark

0 Vote Up Vote Down
Sara Santos Staff answered 10 months ago

That’s great.
I’m glad everything is working as expected.
I’ll mark this issue as resolved. If you need further help, you just need to open a new question in our forum.
Regards,
Sara

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