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	B0B5ML6R5L
Best Sellers Rank	#3,301 in Single Board Computers (Computers & Accessories)
Brand	Hosyond
Built In Media	1 x 3.5" TFT Touch Screen, 1 x touch pen
Compatible Devices	Arduino R3, Mega2560
Connectivity Technology	SD Card
Customer Reviews	4.2 4.2 out of 5 stars (37) 4.2 out of 5 stars
Item Weight	2 ounces
Manufacturer	Hosyond
Model Name	3.5 inch TFT Touch Screen Module
Number Of Items	1
Operating System	Linux
Processor Brand	Atmel
Processor Count	1
Ram Memory Technology	DDR2
Total Usb Ports	1
Unit Count	1 Count
Upc	782917535553
Warranty Description	NO

Hosyond 3.5 inch 480X320 TFT Touch Screen Module LCD Display Shield with SD Card Socket Compatible with Arduino R3 Mega2560

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