Question 1

What is the pin connection description for this module??  ex., is the led pin a backlight and what voltage?

Accepted Answer

Number	Pin Label	Description
1	VCC	5V/3.3V power input
2	GND	Ground
3	CS	LCD chip select signal, low level enable
4	RESET	LCD reset signal, low level reset
5	DC/RS	LCD register / data selection signal,
high level: register, low level: data

6	SDI(MOSI)	SPI bus write data signal
7	SCK	SPI bus clock signal
8	LED	Backlight control, high level lighting,
if not controlled, connect 3.3V always bright

9	SDO(MISO)	SPI bus read data signal, if you do not need to the read function, you can not connect it
(The following is the touch screen signal line wiring, if you do not need to touch function or the module itself does not have touch function, you can not connect them)
10	T_CLK	Touch SPI bus clock signal
11	T_CS	Touch screen chip select signal, low level enable
12	T_DIN	Touch SPI bus input
13	T_DO	Touch SPI bus output
14	T_IRQ	Touch screen interrupt signal, low level when touch is detected

Question 2

Does anyone have an arduino example code running with this 3.2" spi display ? - i tried adafruit, ucglib, tft_espi in two displays and none worked.

Accepted Answer

It works fine for me with an ESP8266 or ESP32.  I couldn't get touch to work on the ESP8266 because of lack of output pins.  I used TFT_eSPI for the picture and touch.  Use Bodners examples.

Question 3

There is conflicting information in the description. 3.5 in with 480x320 is not a 9341.  What is this display's proper description??

Accepted Answer

I'm not an authority here, but I think that you are correct about the conflict.... ILI9341 is 320x240, and ILI9488 is 480x320.  While the main description says ILI9341, one of the pics for this model does identify it as IC Driver ILI9488.   perhaps the seller will update the incorrect information.  FWIW, good price for this display, and includes touch ..

Question 4

Is there any way to control brightness of the backlight?

Accepted Answer

You can drive the 'LED' pin with a PWM signal from a GPIO. The duty cycle of the PWM signal will be proportional to the brightness, just like controlling the brightness of an LED (there are a number of Raspberry Pi and Arduino examples of doing that).

ASIN	B09XHJ9KRX
Best Sellers Rank	#14,229 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in LCD Touch Panels
Brand	Hosyond
Built-In Media	NO
Compatible Devices	Arduino R3
Connectivity Technology	SPI Serial
Customer Reviews	4.3 out of 5 stars 205 Reviews
Included Components	NO
Item Dimensions L x W x H	3.39"L x 1.7"W x 3.28"H
Item Weight	2.5 Ounces
Manufacturer	Hosyond
Model Name	Hosyond 2.8 Inches TFT LCD Touch Screen Shield Display Module
Operating System	Linux
Processor Count	1
RAM Memory Technology	LPDDR
Smart Home Compatibility	Not Smart Home Compatible
UPC	761325160700
Unit Count	1.0 Count
Warranty Description	NO

Hosyond 2.8 Inches TFT LCD Touch Screen Shield Display Module 320x240 SPI Serial ILI9341 with Touch Pen Compatible with Arduino R3/Mega2560 Development Board

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