D1 Mini, photoresistor, pulse_counter

[normal glen]

I’m using a D1 Mini v3.1.0, photo resistor is fed with 3.3v and the input I’m using is GPIO0

I measured a max resistance of 20k through the photoresistor when completely dark. I’m using a 10k resistor to ground just like the example at https://esphome.io/cookbook/power_meter.html

Someone recommended a 100k resistor when using a 3.3v board. I THINK I understand why that would be more suitable but i tried a 100k and it didn’t help. pulse_counter keeps outputting 0 pulses so I guess it doesn’t register the input as LOW or HIGH or neither. I have verified with a voltage meter that the circuit returns <0.2v when completely dark though

Just looking for someone with the exact same setup that could possibly point me in the right direction 🥰

I know there is another sensor called pulse_meter that is more suitable for my end goal but I’m using pulse_counter for now since it has more verbose debug logs

[molten wolf]

i used a 10k resistor as a voltage divider with the 5v line

then used sensor:

• platform: pulse_meter
  pin: D1
  unit_of_measurement: 'kW'
  name: 'Electricity Usage'
  internal_filter: 100ms
  accuracy_decimals: 3
  filters:
  • multiply: 0.06
    total:
    name: "Electricity Total"
    unit_of_measurement: "kWh"
    accuracy_decimals: 3
    filters:
    • multiply: 0.001

that gives me realtime usage

[normal glen]

Is it safe to use the 5v on a D1 mini?

I mean it could theoretically send 5v to the gpio which has a logic level of 3.3v, but maybe that’s ok on this board? 🙂

Oh wait, it would never be 5v since it’s a voltage divider

Sorry, still learning this stuff

Hm no it would output 5v if there was no resistance through the photoresistor

I’m just rubber ducking on my own here 😅