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Details about  I2C & Serial 16x2 & 20x4LCD Controller with Keypad Interface

I2C & Serial 16x2 & 20x4LCD Controller with Keypad Interface

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ByVac Electronics
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GBP 11.55
Approximately AU $22.80(including postage)
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GBP 3.30 (approx. AU $6.52) Royal Mail International Standard (Small Packets) | See details
Item location:
Sheffield, United Kingdom
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Worldwide See exclusions
International shipping and import charges paid to Pitney Bowes Inc. Learn More- opens in a new window or tab
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Last updated on  12 Apr, 2013 20:07:46 AEST  View all revisions

Item specifics

Condition: Brand New  

ByVac Electronics

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Visit Store:   ByVac Electronics

Serial & I2C LCD Display Controller (BV4618)

This can form a complete user interface using either Serial or I2C communication it will attach to any LCD display that uses the HD44780 or similar controller. It is user configurable for displays having up to 4 lines and 80 characters. Automatic scrolling takes place at the end of a line and also at the bottom of the display freeing the host software from mundane tasks.

online iconDocumentation site with the latest information including data sheet, Basic and Arduino Libraries

The is provision for up to a 4x4 (16 key) keypad. The keypad is connected to the controller via the pads provided. There is also an interrupt output that will go low when there is any key in the buffer and goes high when all the values have been removed from the buffer. The host software need not monitor the controller constantly as any key pressed will be captured by the controller.

There are THREE choices of interface, Serial, Serial using RS232 and I2C. The controller firmware will automatically choose the correct mode of operation depending on which interface is connected.

The RS232 interface will accept plus and minus negative voltages and also adjust the inversion to match these signal types. The controller will not output plus and minus negative voltages just 0 and +V but this is usually acceptable for most RS232.

The controller works from 5V. It also comes with the fixing kit and angled connectors so that either interface and the keypad interface can be used. See additional images


  • Serial Input and I2C input
  • Automatic Baud rate from a selection of rates up to 112500
  • Serial interface accepts RS232 input voltage levels
  • I2C up to 400KHz
  • VT100 superset
  • Fully scrolling
  • 65 byte input buffer
  • 16 byte keypad buffer
  • Max line length 80 char
  • Max Lines 4
  • keypad up to 16 switches (4x4)
  • Supply voltage 5V DC
  • Current: 6mA @ 4.7V
  • Size: 55mm x 24mm

Also in the ByVac shop are:

BV4109 - Serial controller with an addressable interface
All of the above also have a fitted option, i.e. not a kit.

16x2 LCD Display Modules 20x4 LCD Display Modules USB to Serial Converter


Business seller information

Jim Spence
PO BOX 4049
South Yorkshire
S36 6WP
United Kingdom


Return policy

Item must be returned within
14 days after the buyer receives it
The buyer is responsible for return postage costs.
Return policy details
If for some reason you are not completely satisfied with this product, return for a full money refund.

Refunds by law: In Australia, consumers have a legal right to obtain a refund from a business for goods purchased if the goods are faulty, not fit for purpose or don't match description. More information at returns - opens in a new window or tab.

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Seller assumes all responsibility for this listing.

Postage and handling

Pay a maximum of GBP 3.30 postage on all eligible items from jimeer, when you use the cart to make your purchase.
Item location: Sheffield, United Kingdom
Posting to: Worldwide
Excludes: Middle East, Argentina, Armenia
Domestic handling time
Will usually post within 1 business day of receiving cleared payment - opens in a new window or tab.

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Immediate payment of GBP 11.55 is required.

Seller's payment instructions

Stray packages: It is very rare that packages go missing even with normal postage delivery. However if this Happens I will normally send another item but this will take up to 3 weeks as recommended by the Royal Mail. If you are concerned about this then please select recorded delivery for the UK and Airsure for anywhere else. Doing this will provide package tacking and thus if anything goes wrong it can be dealt with sooner.

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