ADC, Generic HTTP Update by changing over / under values

[adlerauge1980]

Hi Forum Peoples
I have a question about ADC (Analog input) at my ESP8266
I get values in the range 0 to 400
However, these often change by +/- 5. That gives a lot of data traffic.
However, I only need a notification to my Generic HTTP Controller, when it goes below or above 100.
example: over 100 send a 1 or true and when goes under 100 send a 0 or false


Is for vehicle detection with a Metal Sensor (Garage it's bussy or not)
less than 100 = car is outside
greater than 100 = car is inside
(this value is variable due to the size of the car)

Is there a way to do this? possibly with a rule?

Thanks for your helps!

[Ath]

In that case you should disable the Controller in the Device configuration, and add a Rule with something like this:

Code: Select all

on ADC#Analog do
  if %eventvalue1% > 100
    sendtohttp,<ip>,<port>,<url,status=1>
  else
    sendtohttp,<ip>,<port>,<url,status=0>
  endif
endon

[adlerauge1980]

Hallo Ath

Thanks for your helps.
The Rule works, but, the problem its, when the Value change from 130 to 131 (example) than send esp this again.

I only need a message when the threshold is below or above 100. (Whit your example spam me the ESP my remote station full)

can i intercept this somehow?

[Ath]

Please show your current rule, so I can adjust the code for you.

[Ath]

I've re-used my earlier code to come up with a possible solution.

Code: Select all

on ADC#Analog do
  if %eventvalue1% > 100
    if %v1% = 0
      sendtohttp,<ip>,<port>,<url,status=1>
      let,1,1
    endif
    let,2,0
  else
    if %v2% = 0
      sendtohttp,<ip>,<port>,<url,status=0>
      let,2,1
    endif
    let,1,0
  endif
endon

NB: Untested!

[TD-er]

Also please add a small capacitor close to the ESP over the A0 pin and the GND.
For example 100 nF is generally a good value to start with to filter out some noise.
But for slow changing voltages, you may want to combine a low capacitance value and a higher one.
e.g. 100 nF + 10 uF (note the polarity of the larger one!)

Enabling oversampling in the ADC is also a good idea to get a more stable reading.

[adlerauge1980]

I've re-used my earlier code to come up with a possible solution.

Code: Select all

on ADC#Analog do
  if %eventvalue1% > 100
    if %v1% = 0
      sendtohttp,<ip>,<port>,<url,status=1>
      let,1,1
    endif
    let,2,0
  else
    if %v2% = 0
      sendtohttp,<ip>,<port>,<url,status=0>
      let,2,1
    endif
    let,1,0
  endif
endon

NB: Untested!

Hello Ath, thanks for this querry, after my first tests, work this fine! thank you verry much!

[adlerauge1980]

Also please add a small capacitor close to the ESP over the A0 pin and the GND.
For example 100 nF is generally a good value to start with to filter out some noise.
But for slow changing voltages, you may want to combine a low capacitance value and a higher one.
e.g. 100 nF + 10 uF (note the polarity of the larger one!)

Enabling oversampling in the ADC is also a good idea to get a more stable reading.

Hallo TD-er

and you also a big thanks for this info. i must this make in a slow time window

Thank you!