diff --git a/lib/led_tm1637.c b/lib/led_tm1637.c
index 96174d7..7fcf0fb 100644
--- a/lib/led_tm1637.c
+++ b/lib/led_tm1637.c
@@ -255,7 +255,7 @@ bool led_tm1637_on(void)
 {
 	uint8_t data[] = { 0x88 + display_brightness }; // command to turn display on (use set brightness)
 	bool to_return = false; // result to return
-	if (led_tm1637_write(data,LENGTH(data))) { // send command
+	if (led_tm1637_write(data, LENGTH(data))) { // send command
 		display_on = true; // remember display is on
 		to_return = true; // command succeeded
 	}
@@ -265,7 +265,7 @@ bool led_tm1637_on(void)
 bool led_tm1637_off(void)
 {
 	uint8_t data[] = { 0x80 + display_brightness }; // command to turn display off (use set brightness)
-	if (led_tm1637_write(data,LENGTH(data))) { // send command
+	if (led_tm1637_write(data, LENGTH(data))) { // send command
 		display_on = false; // remember display is off
 		return true; // command succeeded
 	}
@@ -283,15 +283,36 @@ bool led_tm1637_brightness(enum led_tm1637_brightness_t brightness)
 	return false;
 }
 
-bool led_tm1637_number(uint16_t number)
+bool led_tm1637_number(uint16_t number, bool zero)
 {
-	uint8_t write_data[] = { 0x40 }; // command: write data, automatic address adding, normal
-	uint8_t data[] = { 0xc0, ascii_7segments[((number / 1000) % 10) + '0' - ' '], ascii_7segments[((number / 100) % 10) + '0' - ' '], ascii_7segments[((number / 10) % 10) + '0' - ' '], ascii_7segments[((number / 1) % 10) + '0' - ' '] }; // set address C0H and add data
-
-	if (led_tm1637_write(write_data,LENGTH(write_data)) && led_tm1637_write(data,LENGTH(data))) { // send commands
-		return true;
+	const uint8_t write_data[] = { 0x40 }; // command: write data, automatic address adding, normal
+	const uint8_t digits[] = { // digits to display
+		(number / 1000) % 10,
+		(number / 100) % 10,
+		(number / 10) % 10,
+		(number / 1) % 10,
+	};
+	uint8_t data[] = { 0xc0, 0, 0, 0, 0}; // number to be displayed
+	// convert digits to text to be displayed
+	if (0 == digits[0] && !zero) {
+		data[1] = ascii_7segments[' ' - ' '];
+	} else {
+		data[1] = ascii_7segments[digits[0] + '0' - ' '];
 	}
-	return false;
+	if (0 == digits[0] && 0 == digits[1] && !zero) {
+		data[2] = ascii_7segments[' ' - ' '];
+	} else {
+		data[2] = ascii_7segments[digits[1] + '0' - ' '];
+	}
+	if (0 == digits[0] && 0 == digits[1] && 0 == digits[2] && !zero) {
+		data[3] = ascii_7segments[' ' - ' '];
+	} else {
+		data[3] = ascii_7segments[digits[2] + '0' - ' '];
+	}
+	data[4] = ascii_7segments[digits[3] + '0' - ' '];
+
+	// display number
+	return led_tm1637_write(write_data, LENGTH(write_data)) && led_tm1637_write(data, LENGTH(data)); // send commands
 }
 
 bool led_tm1637_time(uint8_t hours, uint8_t minutes)
@@ -299,7 +320,7 @@ bool led_tm1637_time(uint8_t hours, uint8_t minutes)
 	uint8_t write_data[] = { 0x40 }; // command: write data, automatic address adding, normal
 	uint8_t data[] = { 0xc0, ascii_7segments[((hours / 10) % 10) + '0' - ' '], ascii_7segments[((hours / 1) % 10) + '0' - ' '] | 0x80, ascii_7segments[((minutes / 10) % 10) + '0' - ' '], ascii_7segments[((minutes / 1) % 10) + '0' - ' '] }; // set address C0H and add data
 
-	if (led_tm1637_write(write_data,LENGTH(write_data)) && led_tm1637_write(data,LENGTH(data))) { // send commands
+	if (led_tm1637_write(write_data, LENGTH(write_data)) && led_tm1637_write(data, LENGTH(data))) { // send commands
 		return true;
 	}
 	return false;
@@ -318,7 +339,7 @@ bool led_tm1637_text(char* text)
 	uint8_t write_data[] = { 0x40 }; // command: write data, automatic address adding, normal
 	uint8_t data[] = { 0xc0, ascii_7segments[(text[0] & 0x7f) - ' '] | (text[0] & 0x80), ascii_7segments[(text[1] & 0x7f) - ' ']|(text[1] & 0x80), ascii_7segments[(text[2] & 0x7f) - ' ']|(text[2] & 0x80), ascii_7segments[(text[3] & 0x7f) - ' ']|(text[3] & 0x80) }; // set address C0H and add data
 
-	if (led_tm1637_write(write_data,LENGTH(write_data)) && led_tm1637_write(data,LENGTH(data))) { // send commands
+	if (led_tm1637_write(write_data, LENGTH(write_data)) && led_tm1637_write(data, LENGTH(data))) { // send commands
 		return true;
 	}
 	return false;
diff --git a/lib/led_tm1637.h b/lib/led_tm1637.h
index dd93d36..9a14b16 100644
--- a/lib/led_tm1637.h
+++ b/lib/led_tm1637.h
@@ -52,9 +52,10 @@ bool led_tm1637_off(void);
 bool led_tm1637_brightness(enum led_tm1637_brightness_t brightness);
 /** display number
  *  @param[in] number number to display (0-9999)
+ *  @param[in] zero pad number with zero on the left
  *  @return if transmission succeeded
  */
-bool led_tm1637_number(uint16_t number);
+bool led_tm1637_number(uint16_t number, bool zero);
 /** display time
  *  @param[in] hours hours to display (0-99)
  *  @param[in] minutes minutes to display (0-99)