Demo Mode

For Demo and Testing Purpose, the device can use pre-recorded raw images.

You need to enable it in the configuration (TakeImage > Demo) and also provide the needed files on the SD card.

For each round one image gets used, starting with the first image for the first round.

For the reference image and the alignment also the first image gets used.

Once the last image got reached, it starts again with the first one.

SD Card Structure

demo/
├── 520.8983.jpg
├── 520.9086.jpg
├── 520.9351.jpg
├── ...
└── files.txt

The jpg files can have any name
The jpg files must be smaller than 30'000 bytes
The files.txt must contains a list of those files, eg:
```
  520.8983.jpg
  520.9086.jpg
  520.9351.jpg
```

Collecting images of your device

There are several ways to collect images from your device:

Use the RawImagesLocation parameter to store them directly onto your SD card, see Parameter RawImagesLocation
Use the Webhook to send the raw image on each round to a dedicated server, see Webhook resp. ../Parameter UploadImg.

Another option is to pull the images periodically from http://<IP>/img_tmp/raw.jpg. Eg. with an external service. Below is a (Linux)-Bash script to do it:

#!/bin/bash
while [[ true ]]; do
    echo "fetching value..."
    wget -q http://192.168.1.151/value -O value.txt

    value=`cat value.txt`
    echo "Value: $value"

    diff=`diff value.txt value_previous.txt`
    changed=$?
    #echo "Diff: $diff"

     if [[ $changed -ne 0 ]]; then
         echo "Value changed:"
         echo $diff
         echo "fetching image..."
         wget -q http://192.168.1.151/img_tmp/raw.jpg -O $value.jpg
     else
         echo "Value did not change, skipping image fetching!"
     fi

     cp value.txt value_previous.txt

     echo "waiting 60s..."
     sleep 60
 done

Use prepared images

See the selection below with prepared images.

How does it work

The Demo Mode tries to interfere as less as possible with the normal behavior. Whenever a Cam framebuffer gets taken (esp_camera_fb_get()), it replaces the framebuffer with the image from the SD card.

Example Data of a Water Meter

You can use the following demo images if you want:

{:style="width:400px"}

It covers a meter range from 530.00688 to 531.85882.

4.1 KiB Raw Blame History

Demo Mode

SD Card Structure

Collecting images of your device

Use prepared images

How does it work

Example Data of a Water Meter

Animation

Selection of 84 images

Selection of 42 images

All images (843 images)

4.1 KiB

Raw Blame History