IIC I2C Serial Interface Board Module Port LCD1602 Display Arduino PIC Pi ARM UK


14 in stock

Alphanumeric LCD
to I2C Adaptor




The LCD1602 I2C interface board is designed to make it easy to connect any HD44780-based display to your microcontroller over I2C.

The long header connector (with pin 1 marked) should be connected directly to the header connector of your display and follows the standard header pinout, see table below to ensure your LCD conforms to the Pin Output.

The jumper labelled LED can be used to enable or disable the backlight LED driver – if the jumper is connected, then the backlight pins are active. If it is disconnected, the backlight pins are not powered.

The potentiometer controls the LCD contrast.

The I2C address of the board can be controlled by bridging the A0, A1 and A2 pins:

A2 A1 A0 Address
Open Open Open 0x20
Open Open Closed 0x21
Open Closed Open 0x22
Open Closed Closed 0x23
Closed Open Open 0x24
Closed Open Closed 0x25
Closed Closed Open 0x26
Closed Closed Closed 0x27

This board uses the PCF8574T I2C I/O expander. The LCD pins are connected as follows:

PCF8574T pin LCD pin
Not connected D0
Not connected D1
Not connected D2
Not connected D3
P1 R/W
P2 E
P3 Not connected
P4 D4
P5 D5
P6 D6
P7 D7

You must set up the HD44780 controller in 4-bit mode to use it with this interface board.

For information on how to use the PCF8574T chip, see the datasheet: Download Datasheet.


Please read and note the following before ordering:
1) My Shipping is for UK Mainland ONLY. No Scotish Highland, Northern Ireland, Isle of Wight or other Isles. Some areas may incur additional costs, if you are unsure please contact me prior to ordering.
2) Please ensure you have a valid contact phone number, I may pass this number onto the Carrier for delivery. No refund for carriage cost will be offered, if delivery is delayed as a result of no valid contact number being provided.
3) I welcome collection for orders,please select collection on checkout otherwise your order will be despatched. Once your order has been picked and tested if applicable. We will then inform you of a date and time for collection. Please bring your payment card for verification when collecting your order. No order will be released without card verification.
4) I am unable to provide ANY technical support, please ensure you fully understand how this item works by checking for any datasheets (not provided with the item), to enable the product to be used within your application / project.
5) VERY IMPORTANT >> Do not make ANY permanent connections. Please test the item BEFORE making any permanent connections e.g. soldering to the item. Please ensure you have the means to test the item WITHOUT applying ANY solder to the item. If an item has any solder applied I will NOT accept any return.
6) When upgrading to 1st class post, (if the option is available), please note this is sent via Royal Mail and is not a guaranteed next day service. If you need a 48hr courier service please select courier delivery. No weekend or public bank holiday deliveries.
7) We attempt to send out all orders received before 12.00pm. This excludes weekends and public holidays.
8) Customers placing multiple orders. – I may ship all the orders as one, please do not ask for a refund of shipping cost after you have placed your orders. Please do not place your orders if you want a refund of shipping cost.
9) Some items may have a “Warranty Void if removed” sticker, please DO NOT tamper or remove these stickers. I will not accept any rertuns with tampered or removed sticker. Some buyers have tried to send back items that I have not supplied.

**** Important note **** Some sellers claim the stock is in the UK, please be careful, the seller is often in China and sends the item to a UK agent who then forwards the item on with a UK stamp. Check where the seller is located not just the item location. All my items are physically with me, here in the UK and I offer a quick delivery and communication within the UK.

During busy periods there maybe a delay in delivering your package by Royal Mail. I apologies in adavnce for any inconvenience but would like to point this out before you place your order.