FtSwarmFrequency

All inputs can be used as frequency meters. Frequencies between 0 and 1 kHz can be measured.
Frequency

Reed contacts, phototransistors and the encoder motors are suitable as sensors. In conjunction with a CNY 37 light barrier the rare 32367 roller wheel can be used, too.

The fischertechnik pushbuttons are unsuitable as sensors for the frequencymeter class as they are bouncing.

If the input signal for the frequency measurement is significantly higher than 1kHz, the signal places such a heavy load on the CPU of the ftSwarm controller that the controller reacts slowly or incorrectly.

FtSwarmFrequencymeter(FtSwarmSerialNumber_t serialNumber, FtSwarmPort_t port)

Constructor to create a FtSwarmFrequencymeter object. If the referenced controller isn’t connected to the swarm yet, the firmware will waits until the controller gets online.

  • serialNumber: Serial number of the used ftSwarm controller.
  • port: Port number, FTSWARM_A1, FTSWARM_A2, …, FTSWARM_A6.

FtSwarmFrequencymeter(const char *name)

Constructor to create a FtSwarmFrequencymeter object. If the referenced controller isn’t connected to the swarm yet, the firmware will waits until the controller gets online.

  • name: Alias name of the IO port.

int16_t getFrequency()

Returns the frequency in Hz.