📕Sept 2024

The latest version of the 3.5-inch screen is version 2.2. The touch drive IC is different.

Version 2.0

TFT_MISO is pin 12;

Touch_CS is pin 33.

Version 2.2:

TFT_MISO is pin 33;

Touch_CS is pin 12.

Therefore, the corresponding pin numbers need to be modified in the code, and the TFT_eSPI library also needs to be modified accordingly.

📕June 2024

The latest version of the 5-inch and 7-inch screens is version 3.0, which adds the chip PCA9557 to increase timing control. Therefore, you need to add the PCA9557 library to make the touch work properly.

Video: https://www.youtube.com/watch?v=E3NAmstft_8&list=PLwh4PlcPx2GcKJ17Z_xcAxQoh-Tmms_X1&index=3

Code: https://github.com/Elecrow-RD/CrowPanel-ESP32-Display-Course-File/tree/main/CrowPanel_ESP32_Tutorial/Code

①Add the PCA9557 library:

#include <PCA9557.h>

②Define the PCA9557 object:

PCA9557 Out;

③Control with RESET and EN to meet the timing requirements:

Wire.begin(19, 20);
Out.reset();
Out.setMode(IO_OUTPUT); //Set to output mode
Out.setState(IO0, IO_LOW);
Out.setState(IO1, IO_LOW);
delay(20);
Out.setState(IO0, IO_HIGH);
delay(100);
Out.setMode(IO1, IO_INPUT);

📕March 2024

Because "SmartView" has been registered by others, we now officially name the HMI series CrowPanel

📙February 2024

1.Product Name change to SmartView Display

2.Hardware changes:

• Silkscreen: 1. From "Wizee ESP32" to "ESP32 Display-xinch"; 2.From "WZxxx" to "DISxxx"
• All sizes of screens have added battery charging circuits. Connect the battery to the BAT interface and you can charge the battery through the USB-C interface.
• There is no need to manually press the boot button to enter the burning mode for all screen sizes. After you click download in the compiler, the board will automatically enter the burn-in mode.
• After the program download is completed, the program can be automatically run.
• For 3.5-inch display, the chip is changed from ESP32-WROOM-32-N4 to ESP32-WROVER-B, PSRAM is changes to 8MB
• For 5.0, 7.0-inch display, there's I2C port added

Attempting tutorial 4 in the Elecrow Tutorial series. Code compiles and uploads just fine but the screen stays blank and I get the following error on the serial monitor on repeat.

16:27:09.959 -> rst:0x8 (TG1WDT_SYS_RST),boot:0x8 (SPI_FAST_FLASH_BOOT)
16:27:09.959 -> Saved PC:0x40377c49
16:27:09.959 -> SPIWP:0xee
16:27:09.959 -> mode:DIO, clock div:1
16:27:09.959 -> load:0x3fce2820,len:0x116c
16:27:09.959 -> load:0x403c8700,len:0xc2c
16:27:09.959 -> load:0x403cb700,len:0x3108
16:27:09.959 -> entry 0x403c88b8
16:27:14.123 -> ESP-ROM:esp32s3-20210327
16:27:14.123 -> Build:Mar 27 2021

Some googling suggests this is a conflict between a GPIO and the flash (not sure if that's actually the cause of the issue or not), but I'm using the gfx_conf.h from the tutorial files. I've tried different USB ports and have it plugged into a powered USB hub. Not sure what other troubleshooting steps to take at this point.

Files attached for convenience.
I am completely new to this. Please let me know if I can provide any additional information that might prove helpful.

• DS3231 Adafruit RTC module
• ADS1115 Adafruit 16bit ADC
• 2x MCP23017 Adafruit GPIO modules

What i realized is that while all these use the Wire.h library, when using LovyanGFX a different i2c library is internally used to drive the GT911 capacitive touch driver ic breaking the Wire.h functionality.

Is there a way to either use Wire.h for LovyanGFX or disable the touch functionality for a "brief" time freeing up the i2c bus or do I have to rewrite every module library to use the same library LovyanGFX uses?
Thanks in advance.

Now I have to try CrowPanel Advanced 7inch ESP32-P4 HMI AI Display 1024x600
But unfortunately I found examples only for IDF - it’s not suitable for me, I don't plan to learn new framework )

Is it possible to get PlatformIO code examples for CrowPanel Advanced 7inch ESP32-P4 like for CrowPanel-5.0-HMI-ESP32?

I’m evaluating two CrowPanel Advance models for a handheld, battery-powered tool we are looking to develop for use in the UK:
CrowPanel Advance 4.3″ HMI (ESP32-S3, 800×480)
CrowPanel Advance 3.5″ HMI (ESP32-S3, 480×320)

Could you please confirm whether both of these units are covered by your EU CE / RED compliance and share the relevant documents? Specifically:

1) Declarations & reports
A copy of the EU Declaration of Conformity naming the exact model/SKU (3.5″ and 4.3″)
List of applied standards (ideally these or equivalents):
EN 300 328 (2.4 GHz radio)
EN 301 489-1 & EN 301 489-17 (EMC for radio equipment)
EN 62368-1 (safety)
EN 62311/EN 50663 (RF exposure/assessment)
Any test reports (EMC/radio/safety) you can share or reference

2) Marking & labelling
Confirmation the products are CE-marked on the device and/or packaging, and shipped with the required EU/UK user information (manufacturer name/address, frequency band, max power, etc.)
If available, UKCA info (understood that CE is recognised in GB)

3) Radio / antenna
Is there a U.FL / external antenna option for either model, or a part number variant with an external antenna connector?
Stated max conducted power / EIRP in 2.4 GHz band

4) Battery & charging
Rated charge current (default ISET), recommended adapter spec, and any guidance on supported cell capacity (e.g., 5 000 mAh ok; charge time considerations)
Any protective features (OVP/OTP/short-circuit) and notes we should follow for enclosure thermal design

5) ESP-NOW
Confirmation that the plug-in wireless module bay is not required and we only need the on-board ESP32-S3 for Wi-Fi/BLE/ESP-NOW

Usage context (for your reference):
We’ll integrate the CrowPanel into a field tool (Building commissioning). The final product will be enclosed in a metal housing (design considerations still required around on board ESP32-S3 antennae if no external connection option is available) with a battery pack; we’ll complete the end-product conformity assessment (EMC, safety, labelling) and maintain a technical file, but we’d like to include your DoC and test references for the display/HMI.

If you can attach the PDF DoC(s) for the 3.5″ and 4.3″ Advance models (or provide download links), that would be perfect.

Thank you

⚙️ LVDS Interface and Stability
Many professional-grade 7-inch modules adopt LVDS (Low-Voltage Differential Signaling) as their main interface. LVDS ensures stable data transmission with reduced electromagnetic interference — a key factor in industrial or automotive settings where electrical noise is common.
Unlike parallel RGB or SPI interfaces, LVDS supports higher bandwidth, making it suitable for multimedia or high-refresh applications. It also enables longer cable lengths without signal degradation, giving engineers more design flexibility when positioning control boards and displays.

🖐 The Role of Capacitive Touch Panels
Adding a capacitive touch panel (CTP) transforms a standard LCD into an interactive control surface. Multi-touch recognition, fast response, and high transmittance make CTPs ideal for intuitive interfaces.
In many modern projects — from smart terminals to laboratory equipment — CTPs allow designers to replace physical buttons with fully digital touch control, simplifying maintenance and improving user experience. For outdoor or industrial devices, the cover glass can be customized for enhanced durability or optical bonding to improve visibility.

🧠 Design and Integration Considerations
When integrating a 7-inch 1024×600 display into an embedded system, several engineering factors come into play:
Operating temperature range: ensures reliability in both indoor and outdoor conditions.
Brightness and contrast ratio: affect readability under sunlight or ambient light.
Viewing angles: determine usability in dynamic environments.
Connector type and pin assignment: must match the chosen driver board (e.g., 40-pin LVDS).
Touch controller compatibility: influences firmware tuning and interface responsiveness.
By aligning these specifications with the system’s requirements, developers can avoid costly redesigns during later stages of production.

🔗 Practical Example
A typical configuration such as the 7-inch 1024×600 40-pin LVDS CTP LCD module
demonstrates how these parameters come together. It combines an LVDS interface, high-contrast TFT panel, and a capacitive touch layer in a compact design that supports a wide range of embedded platforms.
Such modules can be integrated with control boards for industrial HMIs, 3D printers, automation devices, or test instruments — wherever visual clarity and input precision are needed.

🧭 Moving Toward Human-Centered Interfaces
As industries move toward human-machine systems emphasizing simplicity and precision, the choice of display technology becomes more than a hardware decision — it defines how users perceive and trust the final product.
A well-selected 7-inch LCD module enables clear communication between device and operator, improving workflow efficiency and reducing interface complexity. This focus on user experience is driving engineers to explore better materials, wider temperature ranges, and more flexible mounting options.

💡 Conclusion
The 7-inch 1024×600 LVDS CTP module represents a balance between visual performance and practical integration. It’s not about a specific manufacturer or model — it’s about a display format that continues to meet the technical and ergonomic needs of modern embedded design.For developers or integrators exploring this class of displays, reviewing detailed specifications and testing samples can offer valuable insight into performance under real-world conditions.Those interested in examining one such configuration can refer to this example module available here.