Anyone have a link to the Data Sheet or maybe just a pinout diagram?

I'm not aware of an available data sheet. The pins on the long edge of the board align with those on the 1602 display, straight across. The four pins on one end are labeled, one each for power and ground and two for the I2C connections to the Arduino. The jumper at the opposite end enables/disables the backlight LED

I prefer writing my own device drivers (i work in c / asm). where can i get the datasheet pdf for this device?

I would send that request directly to HiLetgo. They have been very helpful to me in the past.

Are the headers pre-soldered?

Yes, short male header pins. They go through the LCD PCB and just clear the back of the LCD screen. Clip off header pins flush after soldering. IF you need to remove the original pins, heat the short header pin stub and slide out as the solder becomes liquid. The header black base will melt away. Solder-wick the remaining holes.

How do I obtain the schematic and datasheet for this product?

I have not been able to find one.

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HiLetgo 2pcs 5V 2004 1602 LCD Display IIC I2C Adapter IIC Serial Interface Adapter for Arduino Robort Parts

Product ID: 20127321

Details

Brand
HiLetgo
Color
Black
Compatible Devices
Arduino
Connectivity Technology
I2C
Hard Disk Description
Mechanical
Hard Disk Form Factor
2.5 Inches

⚡2.5-6V wide voltage range

🔗I2C protocol support

🖥️Saves 5 Arduino IO ports

฿876

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Description

🚀 Elevate your Arduino game with smarter, sleeker display control!

COMPACT LIGHTWEIGHT DESIGN - Sleek 41.5mm x 19mm module weighing just 5g fits perfectly in any project setup.
CUSTOMIZABLE DISPLAY CONTROL - Adjust backlight and contrast on the fly with easy jumper and potentiometer settings.
PLUG PLAY I 2 C CONNECTIVITY - Seamlessly integrates with Arduino using the reliable I2C serial interface.
EXPANDABLE MULTI MODULE CASCADING - Chain up to 8 modules with address modification for complex, scalable displays.
MAXIMIZE YOUR ARDUINO IO EFFICIENCY - Free up 5 IO ports for more sensors and modules with this smart adapter.

The HiLetgo 2pcs 5V 1602/2004 LCD I2C Serial Interface Adapter is a compact, black PCB module designed to reduce Arduino IO port usage by 5, supporting a 2.5-6V supply voltage and the I2C protocol. It features adjustable backlight and contrast controls, supports cascading up to 8 modules with customizable addresses, and is ideal for robotics, automation, and prototyping projects.

Specifications

ASIN	B00VC2NEU8
Additional Features	Portable
Best Sellers Rank	#119 in Serial Adapters
Brand	HiLetgo
Built-In Media	2 x LCD Display Module
Cache Memory Installed Size	2
Color	Black
Compatible Devices	Arduino
Connectivity Technology	I2C
Customer Package Type	Standard Packaging
Customer Reviews	4.6 out of 5 stars 270 Reviews
Enclosure Material	Plastic
Form Factor	Microcontroller
Hard Disk Description	Mechanical Hard Disk
Hard Disk Interface	Serial ATA
Hardware Connectivity	Serial Interface
Hardware Platform	PC
Installation Type	Plug In
Item Dimensions L x W x Thickness	1.63"L x 0.75"W x 0.6"Th
Item Weight	5 g
Manufacturer	HiLetgo
Mfr Part Number	3-01-0080
Model Name	3-01-0080
Model Number	3-01-0080
Number of Items	1
Special Feature	Portable
Specific Uses For Product	Robotics, Automation, Prototyping
UPC	797698770260

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฿876

Duties & taxes included

In stock

Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Thailand.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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