TJC 3.5 HMI LCD Coding

[leansolution]

Hello!
I have this TJC 3.5" HMI LCD, which is similar to Nextion HMI LCD

This is the model I have, it is a Chinese version of Nextion HMI.
My question is how can I program it , Does anyone use it?
Can I get its library Code?
Or can I use the nextion library with the TJC HMI LCD?

I have an important question regarding adding HMI code. Typically, you generate a file using the TJC editor (Nextion Editor), upload it to an SD card, and then insert the SD card into the TJC LCD. After powering on the device, the GUI uploads on the TJC LCD.

What I want to achieve is to send the HMI file generated by the TJC editor (Nextion Editor) directly from my ESP32 code to the TJC display serially, instead of uploading it to the SD card from my PC.

[PerryBebbington]

What do you mean by 'Chinese version of a Nextion'? Nextions are Chinese.

[leansolution]

TJC editor is in the Chinese language, and Nextion is in English, that's why I say Chinese version. I think both are manufactured in China

[PerryBebbington]

@leansolution

What I want to achieve is to send the HMI file generated by the TJC editor (Nextion Editor) directly from my ESP32 code to the TJC display serially, instead of uploading it to the SD card from my PC.

I have tried to do that with a different board, maybe Nano Every, not sue, but I couldn't get it working. I didn't try very hard so maybe it's possible, I don't know. You would need to receive data from the USB connection on your PC and forward it to the serial port connected to the Nextion, and do the reverse.

You should be able to use a USB serial adapter to connect a Nextion to your PC and program it that way. I usually do it that way.

[cattledog]

@PerryBebbington

You should be able to use a USB serial adapter to connect a Nextion to your PC and program it that way. I usually do it that way.

Yes, that's the way I do it as well.

[leansolution]

Can I mirror the Nextion display to my PC display?

[PerryBebbington]

Erm,
I'm not really clear what you are asking, but I can't imagine how you could display what is on the Nextion to your PC, so no. Well, no unless I have completely misunderstood you.

I suggest you start with my tutorial and come back if you get stuck.

Using Nextion displays with Arduino

Introduction Nextion displays include either a resistive touch panel (RTP) or capacitive touch panel (CTP) and provide an easy way to create a touch screen interface, or human machine interface (HMI) for your project. The displays require a spare serial port to communicate with them. To get the best from them requires an understanding of how to drive them, and what works and doesn't work. The advice here is based on my work with multiple projects using Nextion displays with both PIC and Arduino…

[leansolution]

Let me explain my situation.

I have a small 3.5-inch Nextion display integrated into my device with a PCB board. Since it is a compact size, someone in the industry has requested a larger display. My device will be located inside a motor control panel, while the larger screen needs to be mounted on the outside of the panel. I am looking for a solution to mirror the display from the internal Nextion screen to a larger Nextion display positioned outside the panel.

[cattledog]

@leansolution

I have a small 3.5-inch Nextion display integrated into my device with a PCB board.

I am looking for a solution to mirror the display from the internal Nextion screen to a larger Nextion display positioned outside the panel.

The .HMI file running on the Nextion is screen size specific, so passive mirroring would not be possible and a reconfigured .HMI file will need to be running on the larger display.

If the mcu does not need to be reading and writing to both displays at the same time you might be able to switch the serial connection to the mcu between the two displays and just run one or the other.

If both displays have to be operative at the same time, and you have control to change or reprogram the mcu you might be able to use multiple serial ports to talk to two independent displays.

Telling your boss that what they want to do is nor really feasible or "the juice is not worth the squeeze" is an important skill. You may get a chance to develop it on this project.