I²C 4-Digit 7-Segment LED Display smartLED

The smartLED is a 4-digit 7-segment display encased in a 9V red battery box (references 32263 and 32958). 

It is connected to the TX controller through I²C.

• Caution
Before using this device, please read the specification carefully sheet and check voltage requirements.

Device

  • Manufacturer:  Rei Vilo   
  • Break-out provider: 
  • Specification sheet: 
  • I²C address: 0x16

Standard Functions

LED_begin   initialise the sensor 
  • Input: None
  • Output: None
  • Exit: So if valid, ER if initialisation failed

LED_clear   clear all the segments on the 4 digits
  • Input: None
  • Output: None
LED_decimal   display a decimal number from 0000 to 9999
  • Input: number, Integer
  • Output: None

LED_hexadecimal   display an hexa-decimal number from 0000 to FFFF
  • Input: number, Integer
  • Output: None

Advanced Functions

LED_point  switch the decimal point of the given digit off or on
  • Input: number of the digit, 0=off or 1=on, Integer
  • Output: None
LED_zero   set the leading zero mode
  • Input: mode 0, 1 or 2, Integer
  • Output: None
with 0=keep all leading zeroes, 1=hide all leading zeroes , 2=hide leading zeroes before decimal point.
LED_set   switch the segments of the given digit off or on
  • Input: number of the digit, binary coding value, Integer
  • Output: None
The binary coding of the segments used is:
  • bit 0 = 2^0 = 1 = 0x01 for segment a
  • bit 1 = 2^1 = 2 = 0x02 for segment b
  • bit 2 = 2^2 = 4 = 0x04 for segment c
  • bit 3 = 2^3 = 8 = 0x08 for segment d
  • bit 4 = 2^4 = 16 = 0x10 for segment e
  • bit 5 = 2^5 = 32 = 0x20 for segment f
  • bit 6 = 2^6 = 64 = 0x40 for segment g
  • bit 7 = 2^7 = 128 = 0x80 for the decimal point or for the column between hours or minutes, depending on the display
For example, 
  • Displaying a capital A requires lighting the segments a, b, c, e, f and g. Adding a + b + c + e + f + g = 1 + 2 + 4 + 16 + 32 + 64 gives 119 or 0x77.
  • Displaying the minus sign only requires the g segment, thus 64 = 0x40.

Try your own messages!
This example displays all the possible combinations on the left-most digit with the corresponding value on the three digits.

Download

Download the driver with an example for RoboPro.     

This file is under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.