7 inch — ELECROW - FORUM

communication esp32-s3

zjef — Tue, 28 Apr 2026 18:03:00 +0000

I have the CrowPanel ESP32 HMI 7.0-inch Display. I would like to have the screen communicate with an ESP32-S3 via UART; the ESP32-S3 needs to be able to communicate with the display and vice versa. does someone know how to do this, I tried to communicate with an arduino uno and it works fine, once i try it to communicate with an esp32 it just doesn't work. can someone give me extra information or a sample code? thank you

EMC compliance

kisszabo11 — Fri, 24 Apr 2026 16:28:00 +0000

Is the RC070 7inch 1024*600 LCD Display compiant with any EMC standard?
Can you please share the test report?

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.