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Print displaytime to the Serial Monitor: Int displaytime = (now.hour() * 100) + now.minute() This line sets the RTC with an explicit date & time, for example to set The following line sets the RTC to the date & time this sketch was compiled: Serial.println("RTC lost power, lets set the time!") Check if the RTC lost power and if so, set the time: Begin serial communication at a baud rate of 9600: RTClib-master.zip Example code /* Arduino example code to display a 24 hour time format clock on a TM1637 4 digit 7 segment display with a DS32321 RTC.

I just used the function clear() to ensure that the display was cleared. You can leave the setup section of the code empty if you want. SEG_A | SEG_D | SEG_E | SEG_F | SEG_G // E SEG_A | SEG_B | SEG_C | SEG_D | SEG_E | SEG_F, // O SEG_B | SEG_C | SEG_D | SEG_E | SEG_G, // d You can set the individual segments per digit to spell words or create other symbols: Each segment is separated by a | and digits of the display are separated by a comma. The library has a function built-in that makes setting individual segments a bit easier.

Create array that turns all segments on:Ĭonst uint8_t data = TM1637Display display = TM1637Display(CLK, DIO) Create display object of type TM1637Display: * Example code for TM1637 4 digit 7 segment display with Arduino. You can copy the code by clicking the button in the top right corner of the code field. Use this image as a reference when setting the individual segments in the code later. The segments are labeled A to G and some displays also have a dot (the 8th LED). Two pins are required for the power connections and the other two pins are used to control the segments.ħ-segment displays contain 7 (or 8) individually addressable LEDs. Thanks to the TM1637 IC mounted on the back of the display module, this number can be reduced to just four. That’s quite a lot and doesn’t leave much room for other sensors or modules. is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to products on .īare 4-digit 7-segment displays usually require 12 connection pins.