change state and image of dual button

1

Hello friends I need help for this function.
my project is to control a light with a nextion screen and an external button and when I activate the external button I need the Dual button to change state and change to the second image.
I use this command.
bt0.Set_state0_image_pic0(0);
the screen receives this bt0.pic0=0ÿÿÿ but it doesn’t change the image, it doesn’t activate the button.
Any help thanks.

2

It’s easy to send data directly to the Nextion without using a library.
This works for me:

Serial.print(“pageMain.bt10.val=1”); // 0 = enabled
Serial.print(“\xFF\xFF\xFF”);

All of the image changes in my code are done on the Nextion.

p.s. Change Serial to the actual port you have the Nextion connected to.

3

Thanks for answering.
this is the address of my dual button
NexDSButton bBarlovento = NexDSButton(1,18, "bBarlovento ");

nextion button

Serial2.print(“page1.bBarlovento.val=1”); // 2 = enabled
Serial2.print("\xFF\xFF\xFF");

thanks for your help elf, it will be like this the command I use arduino mega 2560 in serial 2

4

thank you very much elf it worked for me…

Is there any document where to know all the commands by serial?

5

I think most of the commands listed in the Instruction Set: Instruction Set - Nextion should work. The attributes in green in the IDE should all be settable over serial. You can always put code in a Nextion control (hotspot uses the least amount of memory) then call it using the click command over serial.

6

elf I have my nextion screen set so that the brightness goes to 0 after 15 seconds.
could you tell me how is the command to raise brightness from arduino? Thank you

7

dim=(brightness) setting from 0 to 100
or dims=(brightness) for a more durable setting which survives reboot

8

Thank you very much Fjodor I got it