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I am really new to working with ESP32.
My goal is to use the device to count Pulse from electricity meters.
I understand ESP has a pulse counter sensor
https://esphome.io/components/sensor/pulse_counter.html
Code: # Example configuration entry
sensor:
- platform: pulse_counter
pin: GPIOXX
unit_of_measurement: 'kW'
name: 'Power Meter House'
filters:
- multiply: 0.06 # (60s/1000 pulses per kWh)
Also, I read only 8 channels can be used.
Quote:On the ESP32, this sensor is even highly accurate because it’s using the hardware pulse counter peripheral on the ESP32. However, due to the use of the pulse counter peripheral, a maximum of 8 channels can be used!
So this limits me a bit in my initial plan, as I try to read out pulse (s0) from 24 different power meters.
Question1: when I try this function block, almost all ports are already "in use" for some other function, or I get the message "WARNING GPIO5 is a strapping PIN and should only be used for I/O with care.". How can I deduct which PINS can actually be used? I assumed all the GPIOs could be used, but I am just starting out so still need to learn some things.
Question2: Considering the maximum number of channels is 8, does KC868-AI has 8 free GPIO available? If not, are there other kincony boards available? I could then use 3 of those to cover all meters.
does this makes sense?
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K868-a16s - sensors connect