IsegBegin() sets the CLK/DIO pins and device number of a TM1637 FND display.

bool IsegBegin(uint8_t clkPin, uint8_t dioPin, uint16_t bitDelayUs = 100, uint8_t device = 0)

void setup() {
  IsegBegin(14, 15);       // MPAINO: TXD(D14), RXD(D15)
  IsegBrightness(7);
  IsegClear();
}
 
void loop() {
  IsegDecimal((millis() / 1000UL) % 10000UL, true);
  delay(200);
}

• These commands are only for 4-digit FND displays with a TM1637 IC. They do not directly drive a generic multiplexed FND display.
• Use display commands after successfully calling IsegBegin().
• Initialization fails if CLK and DIO use the same pin, or if the device number is 7 or higher.
• length + position must be 4 or less. Numbers outside the range are not displayed, and false is returned.
• Communication may block execution for several ms. Do not call this from an interrupt service routine.
• Do not use the specified pins simultaneously for UART, PWM, encoders, external interrupts or other functions.
• Check the actual module and product manuals for FND power and signal voltages.

← Built-in Command List