#touchscreen — ELECROW - FORUM

Touchscreen failure on CrowPanel_Advance_3.5 with C6 wireless module

msullivan — Mon, 02 Mar 2026 15:10:48 +0000

I have the touchscreen working with esphome using i2c on gpio 15 & 16, When I plug in a C6 wireless module the touch screen doesn't work at all and the esphome logs show it detecting many non-existent i2c devices at addresses 0x08-0x14 & 0x65-0x77. Is the i2c bus and touchscreen expected to work properly with the C6 wireless module?

Based on the Wireless_Module-ESP32-C6_DataSheet.pdf and the wiki for CrowPanel_Advance_3.5-HMI_ESP32_AI_Display.html it appears as though the host gpio 15 & 16 connect to the C6 gpio20 and EN pins. Is that correct?

If the C6 gpio20 is set to an input pullup would you expect the host i2c bus to work properly? If the host i2c bus drives the C6 EN pin would you expect it to be fast enough to avoid resetting the C6?

Strange Error when compiling Lesson 4 (Drawing board) 7 inch V3.0

roycejp — Sun, 23 Nov 2025 22:19:20 +0000

Hi
I copied the provided PCA9557 file into the Libraries folder.
Now i get this error (7" v3.0):-
.......\libraries\LovyanGFX\src\lgfx\v1\platforms\esp32s3\Bus_RGB.cpp: In function 'void lgfx::v1::_gpio_pin_sig(uint32_t, uint32_t)':
d:\OneDrive\ESP32\libraries\LovyanGFX\src\lgfx\v1\platforms\esp32s3\Bus_RGB.cpp:98:5: error: 'gpio_hal_iomux_func_sel' was not declared in this scope; did you mean 'gpio_hal_func_sel'?
98 | gpio_hal_iomux_func_sel(GPIO_PIN_MUX_REG[pin], PIN_FUNC_GPIO);
| ^~~~~~~
| gpio_hal_func_sel
exit status 1
Compilation error: exit status 1
Please tell what I need to do.

Touch screen has no response

sylvanoMTL — Wed, 28 May 2025 17:58:02 +0000

I am investigating why my crowpanel 3.5 resistive is not responding to touch.,
I have install the libraries, and I am using the arduino Code from TST_eSPI library: Examples>TFT_eSPI>Tests And Diagnostics > Test_Touch_Controller.
I am using the User_setup.h provided by elecrow for the TFT 3.5 in screen:

#define TFT_WIDTH  320
#define TFT_HEIGHT 480 
#define TFT_BL   27            // LED back-light control pin
#define TFT_BACKLIGHT_ON HIGH  // Level to turn ON back-light (HIGH or LOW)
#define TFT_MISO 12
#define TFT_MOSI 13 // In some display driver board, it might be written as "SDA" and so on.
#define TFT_SCLK 14
#define TFT_CS   15  // Chip select control pin
#define TFT_DC   2  // Data Command control pin
#define TFT_RST  -1  // Reset pin (could connect to Arduino RESET pin)
#define TFT_BL   27  // LED back-light

#define TOUCH_CS 33     // Chip select pin (T_CS) of touch screen

I have uploaded the sketch and terminal is open with the correct baudrate.
Pressing the screen does not give any feedback in the Serial.

Can you please help me resolving the issue? Did I receive a faulty touch screen?

Brightness of the display

Harshit — Thu, 29 May 2025 07:30:33 +0000

I am planning to use ELECROW ESP32 display 7.0 Inch HMI Display 800×480 RGB TFT LCD Touch Screen Compatible with Arduino/LVGL/PlatformIO/ Micropython Without Acrylic Case. But I didn't get any info related to the brightness of the display.
Can you tell the brightness of the display and also suggest some display in 7.0 Inch HDMI with 600+nits brightness if possible.

RC050 : 5" Capacitive Touch LCD Display for RPi - Touch Not Working w/Pi Zero 2W [Resolved]

3dp — Sat, 03 May 2025 16:37:06 +0000

Having followed all the things, I can't seem to get the touch working on a Pi Zero W. Works on a Pi 4, but nothing I've been able to do to get it to work on a Pi Zero. Looking for any assistance.

Followed instructions here:

I2C and Touch

harryskalvi — Mon, 31 Mar 2025 05:52:04 +0000

Touch Freezes when I2C device is configured

DIS08070H : CrowPanel 7.0" HMI ESP32 Display - TOUCH ISSUE

Soumya — Fri, 01 Nov 2024 11:05:00 +0000

So i got a new crowpanel 7 inch V3.0 display with touchscreen and tried to learn the basics through their youtube tutorial but one the 4th lesson i was stuck because the code did upload successfully but i wan unable to draw anything so if someone else has encountered similar issue kindly help me out. (I also checked the panel by uploading the default LVGL interface and the touch did work there so i think the error is in the code or the code provided in lesson 7 .)

CRV00117L - CrowVision 7 inch LCD tactile touch is not working [Solved]

asis — Tue, 17 Dec 2024 16:57:54 +0000

Hello, I have just receive a CrowVision 7 Inch Touch Screen Capacitive Portable 1024*600 IPS LCD Monitor Rear Fixing for Raspberry Pi but works with a Raspberry Pi 3B from 2015. The problem is the tactile is not working. In my Pi there is not a USB-C for the tactila so, I put a mini usb cable but.... tactile is not working

QLED Capacitive Touch Screen：the screen shows white bars with Jetson

Jully — Thu, 12 Dec 2024 07:37:58 +0000

Product:800×480 QLED Capacitive Touch Screen Display

Question: When using it with my Nvidia Jetson Xavier NX. The display works fine during the BIOS screen, but once the system begins booting, the screen shows white bars and becomes glitchy or there is no display all together. The only way to resolve this issue is to leave the display HDMI unplugged while the Jetson Xavier is booting, then plugging it in afterwards, doing this results in the display working as intended.

Solution:
1.Adjusting the output resolution of your Jetson Xavier NX to 800x480, which should match the native resolution of the display and help prevent these issues.

2.Used the command:
sudo rtcwake -m mem -s 5
To restart the display and run this command automatically after the jetson boots into Ubuntu.

RC050S Fan Connector

Hyperion0 — Wed, 27 Nov 2024 13:50:04 +0000

I need to replace the fan for my RC050S, but I can't find any information about what the fan size is or anything.
Strictly speaking the fan still works, if I can get the correct size jumper for the board, but again I can't find any information on the fan or what size jumper I would need to reconnect it.
Does anyone have any info or details?