Help with logic level shifter

deanfourie · August 25, 2024, 9:47pm

Yes thanks I will do this tonight. Im sure it will work.

Karosm · August 25, 2024, 9:49pm

No doubts. Good “night”.

deanfourie · August 25, 2024, 9:54pm

Good night and thank you!

deanfourie · August 25, 2024, 9:55pm

Just voltage, 0-5v as thats the sensor I selected from the options when ordering.

deanfourie · August 26, 2024, 9:41am

Thanks all, this Voltage Divider worked well.

One thing I noticed is I do get quite fluctuating readings? Is this normal or can this be smoothed out?

My board is a WT32-ETH01 and the code as follows:

sensor:
  - platform: adc
    pin: GPIO15
    name: "Water Tank Level"
    update_interval: 60s
    attenuation: auto
    unit_of_measurement: "%"
    accuracy_decimals: 1
    filters:
    - calibrate_linear:
      # Map 0.0 (from sensor) to 0.0 (true value)
      - 0.00 -> 0
      - 0.40 -> 10
      - 0.70 -> 20
      - 1.00 -> 30
      - 1.30 -> 40
      - 1.60 -> 50
      - 1.90 -> 60
      - 2.10 -> 70
      - 2.40 -> 80
      - 2.70 -> 90
      - 3.00 -> 100

Thanks

[21:40:02][D][sensor:094]: 'Water Tank Level': Sending state 2.51813 V with 2 decimals of accuracy
[21:40:03][D][sensor:094]: 'Water Tank Level': Sending state 2.48815 V with 2 decimals of accuracy
[21:40:04][D][sensor:094]: 'Water Tank Level': Sending state 2.51013 V with 2 decimals of accuracy
[21:40:05][D][sensor:094]: 'Water Tank Level': Sending state 2.53511 V with 2 decimals of accuracy
[21:40:06][D][sensor:094]: 'Water Tank Level': Sending state 2.47117 V with 2 decimals of accuracy
[21:40:07][D][sensor:094]: 'Water Tank Level': Sending state 2.53111 V with 2 decimals of accuracy
[21:40:08][D][sensor:094]: 'Water Tank Level': Sending state 2.47916 V with 2 decimals of accuracy
[21:40:09][D][sensor:094]: 'Water Tank Level': Sending state 2.48516 V with 2 decimals of accuracy
[21:40:10][D][sensor:094]: 'Water Tank Level': Sending state 2.54510 V with 2 decimals of accuracy
[21:40:11][D][sensor:094]: 'Water Tank Level': Sending state 2.47117 V with 2 decimals of accuracy
[21:40:12][D][sensor:094]: 'Water Tank Level': Sending state 2.46618 V with 2 decimals of accuracy
[21:40:13][D][sensor:094]: 'Water Tank Level': Sending state 2.52112 V with 2 decimals of accuracy
[21:40:14][D][sensor:094]: 'Water Tank Level': Sending state 2.51313 V with 2 decimals of accuracy
[21:40:15][D][sensor:094]: 'Water Tank Level': Sending state 2.51912 V with 2 decimals of accuracy
[21:40:16][D][sensor:094]: 'Water Tank Level': Sending state 2.47916 V with 2 decimals of accuracy
[21:40:17][D][sensor:094]: 'Water Tank Level': Sending state 2.49914 V with 2 decimals of accuracy
[21:40:18][D][sensor:094]: 'Water Tank Level': Sending state 2.53411 V with 2 decimals of accuracy
[21:40:19][D][sensor:094]: 'Water Tank Level': Sending state 2.52812 V with 2 decimals of accuracy
[21:40:20][D][sensor:094]: 'Water Tank Level': Sending state 2.48416 V with 2 decimals of accuracy
[21:40:21][D][sensor:094]: 'Water Tank Level': Sending state 2.52812 V with 2 decimals of accuracy
[21:40:22][D][sensor:094]: 'Water Tank Level': Sending state 2.54310 V with 2 decimals of accuracy
[21:40:23][D][sensor:094]: 'Water Tank Level': Sending state 2.50214 V with 2 decimals of accuracy
[21:40:24][D][sensor:094]: 'Water Tank Level': Sending state 2.51513 V with 2 decimals of accuracy
[21:40:25][D][sensor:094]: 'Water Tank Level': Sending state 2.53211 V with 2 decimals of accuracy
[21:40:26][D][sensor:094]: 'Water Tank Level': Sending state 2.48416 V with 2 decimals of accuracy

Karosm · August 26, 2024, 10:58am

You can try with median filter with quite high window.
Also, in case you find out calibrate_linear is not “straight line”, change it to:

- calibrate_linear:
         method: exact
         datapoints:
           # Map 0.0 (from sensor) to 0.0 (true value)
          - 0.00 -> 0
          - 0.40 -> 10
          - 0.70 -> 20
          - 1.00 -> 30
          - 1.30 -> 40
          - 1.60 -> 50
          - 1.90 -> 60
          - 2.10 -> 70
          - 2.40 -> 80
          - 2.70 -> 90
          - 3.00 -> 10

deanfourie · August 26, 2024, 9:59pm

I feel like trying to eliminate the noise on the ADC would be a better option,

If it reads,

1.34000 volts thens it needs to read just 1.34000 volts.

Is there a wau to clean up the ADC noise?

Karosm · August 26, 2024, 10:24pm

Noise is always there. It’s not necessarily better to filter if with hardware than with software. Use shielded twisted pair wiring (grounded at supply end), far from power wires, add some small capacitor etc. But in your case you don’t need fast response so just filter in in your code.

deanfourie · August 27, 2024, 5:47am

Ok im all for software filters then,

Where do I start, with

     method: exact

deanfourie · August 27, 2024, 5:57am

Still a lot of fluctuation,

Karosm · August 27, 2024, 6:18am

That’s for calibration, not for filtering.
I wrote to try median filter.

filters:
    - median:
        window_size: 15
        send_every: 4

deanfourie · August 27, 2024, 11:14am

Thanks, I have tried with that, but still quite varying voltage. What kind of accuracy can I expect.

[23:12:31][D][sensor:094]: 'Water Tank Level': Sending state 2.60804 V with 1 decimals of accuracy
[23:12:35][D][sensor:094]: 'Water Tank Level': Sending state 2.60804 V with 1 decimals of accuracy
[23:12:39][D][sensor:094]: 'Water Tank Level': Sending state 2.61803 V with 1 decimals of accuracy
[23:12:43][D][sensor:094]: 'Water Tank Level': Sending state 2.61803 V with 1 decimals of accuracy
[23:12:47][D][sensor:094]: 'Water Tank Level': Sending state 2.62202 V with 1 decimals of accuracy
[23:12:51][D][sensor:094]: 'Water Tank Level': Sending state 2.62202 V with 1 decimals of accuracy
[23:12:55][D][sensor:094]: 'Water Tank Level': Sending state 2.62302 V with 1 decimals of accuracy
[23:12:59][D][sensor:094]: 'Water Tank Level': Sending state 2.63601 V with 1 decimals of accuracy
[23:13:03][D][sensor:094]: 'Water Tank Level': Sending state 2.65000 V with 1 decimals of accuracy
[23:13:07][D][sensor:094]: 'Water Tank Level': Sending state 2.65000 V with 1 decimals of accuracy
[23:13:11][D][sensor:094]: 'Water Tank Level': Sending state 2.65000 V with 1 decimals of accuracy
[23:13:15][D][sensor:094]: 'Water Tank Level': Sending state 2.63501 V with 1 decimals of accuracy
[23:13:19][D][sensor:094]: 'Water Tank Level': Sending state 2.63501 V with 1 decimals of accuracy

Karosm · August 27, 2024, 11:53am

I don’t know your sensors accuracy. Your log readings are within 1.5%, should be enough for water tank level.
You could replace that median filter with:

filters:
  - delta: 0.1

With that it’s not changing the value if it’s not at least 0.1V higher or lower.

Try different filters and or higher values.

stevemann · August 27, 2024, 2:08pm

This isn’t what your video shows.

deanfourie · August 27, 2024, 8:39pm

Sorry I changed for testing.

deanfourie · August 27, 2024, 8:40pm

Weird, now it doesn’t report any values at all. The sensor just doesn’t read or report any data.

sensor:
  - platform: adc
    pin: GPIO15
    name: "Water Tank Level"
    update_interval: 1s
    attenuation: auto
#    unit_of_measurement: "%"
    accuracy_decimals: 1
    filters:
    - delta: 0.1
    - calibrate_linear:
         datapoints:
           # Map 0.0 (from sensor) to 0.0 (true value)
          - 0.00 -> 0
          - 0.40 -> 10
          - 0.70 -> 20
          - 1.00 -> 30
          - 1.30 -> 40
          - 1.60 -> 50
          - 1.90 -> 60
          - 2.10 -> 70
          - 2.40 -> 80
          - 2.70 -> 90
          - 3.00 -> 10

Fallingaway24 · August 27, 2024, 8:59pm

log output? what does that mean?

Values don’t change? Reports 0.0? Reports NaN? Reports Unknown? Sensor is completely missing?

How much water are you measuring?

No one knows what your talking about if you aren’t specific or provide config, logs, pictures… Anything that’s better than a vague description open to interpretation please.

deanfourie · August 27, 2024, 9:06pm

Sorry, my code is

sensor:
  - platform: adc
    pin: GPIO15
    name: "Water Tank Level"
    update_interval: 1s
    attenuation: auto
#    unit_of_measurement: "%"
    accuracy_decimals: 1
    filters:
    - delta: 0.1
#    - calibrate_linear:
#         datapoints:
#          # Map 0.0 (from sensor) to 0.0 (true value)
#          - 0.00 -> 0
#          - 0.40 -> 10
#          - 0.70 -> 20
#          - 1.00 -> 30
#          - 1.30 -> 40
#          - 1.60 -> 50
#          - 1.90 -> 60
#          - 2.10 -> 70
#          - 2.40 -> 80
#         - 2.70 -> 90
#          - 2.70 -> 10

The log output is just this,

[09:05:12][D][api:102]: Accepted 192.168.1.102
[09:05:12][D][api.connection:1388]: Home Assistant 2024.8.3 (192.168.1.102): Connected successfully
[09:06:08][I][safe_mode:041]: Boot seems successful; resetting boot loop counter
[09:06:08][D][esp32.preferences:114]: Saving 1 preferences to flash…
[09:06:08][D][esp32.preferences:143]: Saving 1 preferences to flash: 0 cached, 1 written, 0 failed

Fallingaway24 · August 27, 2024, 9:22pm

Oh, Ok. Since you decided which tiny pieces of the config and log output are the only relevant information anyone needs to see in order to assist you then, you should have no problem figuring it out. Obviously the problem can be known from that 1/20th of a log output you chose limit information to.

Karosm · August 27, 2024, 9:22pm

It’s not well documented how all filters work together. For example accuracy decimal and delta could fight against each other. Just play with the filters, your use case doesn’t need super responsive values so tune it to your preference…