Let me start by explaining what I am trying to do (endgame wise). I did not like the controls on my Sawtooth Pellet Smoker, so I have ripped them out and have been using an Arduino Uno, a relay shield and an Adafruit LCD display, along with a thermocouple amp and thermocouple probe to measure the temperature in my smoker. I have a setpoint that I would like to keep the smoker at, and I have a special startup mode for when the smoker is cold (Right now it just reads the thermocouple and if it is <150 degrees, goes into Startup mode).
So I have a Nextion NX4832T035 display. I have successfully hooked it to my Arduino Uno and have been able to upload (via SD card) my layouts. I have a total of 3 pages right now:
Attached is a modified version of your HMI.
When you start your project, temp is 0 as it hasn't been set
To get started your Arduino should send the following with the actual temperature when you have it
I forgot to mention
Sending get main.va0.val from your arduino will allow you to retrieve the temperature value once set.
Do this when the 0x65 0x01 0x01 0x00 0xFF 0xFF 0xFF nextion response code has been received.