The SED-M0x
module provides a Pulse counter input or pulse width modulated output (PWM output).
Both functions use the same timer, therefore, you can only configure/use one or the other.
A Sedona “pulse” kit provides two components usable in a Sedona app to interface to this functionality, either:
PulseCtr — Provides pulse count received on the associated hardware pins.
Pwm — Provides PWM output on the associated hardware pins.
On the Sedona dev board, related hardware pins for both functions are on the J4 Expansion Header, as follows:
Pin 12 — Ext clock in (for PulseCtr) / PWM gate in (for Pwm).
Pin 14 — PWM output.
Pin 40 — Ground reference.
To use, use pin 40 on the expansion header as ground, and pin 12 of the header for the input signal. The open circuit differential is about 3.2V above ground. A dry contact between these pins can be used for an input.
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