mirror of
https://github.com/sascha-hemi/pycom-documentation.git
synced 2026-03-21 12:05:39 +01:00
132 lines
4.6 KiB
Markdown
132 lines
4.6 KiB
Markdown
# Visualise data from your device
|
|
|
|
In this section, we will explain to you how to create widgets for data visualisation and set up your device's dashboard on Pybytes.
|
|
|
|
{% hint style="info" %}
|
|
We assume that you already have your device connected to Pybytes. In case you haven't, check how to [add your device here](connect/). After your done with that, you can proceed to the next example.
|
|
{% endhint %}
|
|
|
|
## Step 1: Set up your application \(`main.py`\)
|
|
|
|
The first step is to have an application running on your device. The application in this example sends data from a vector every 10 seconds to Pybytes.
|
|
|
|
1. Open the `main.py` file on Pymakr;
|
|
2. Insert the following code on your `main.py`;
|
|
|
|
```python
|
|
# Import what is necessary to create a thread
|
|
import _thread
|
|
from time import sleep
|
|
|
|
# Increment index used to scan each point from vector sensors_data
|
|
def inc(index, vector):
|
|
if index < len(vector)-1:
|
|
return index+1
|
|
else:
|
|
return 0
|
|
|
|
# Define your thread's behaviour, here it's a loop sending sensors data every 10 seconds
|
|
def send_env_data():
|
|
idx = 0
|
|
sensors_data = [0, -0.2, -0.5, -0.7, -0.8, -0.9, -0.9, -0.9, -0.8, -0.6, -0.4, -0.2, 0, 0.3, 0.5, 0.7, 0.8, 0.9, 0.9, 0.9, 0.8, 0.6, 0.4, 0.1]
|
|
|
|
while (pybytes):
|
|
pybytes.send_virtual_pin_value(False, 1, sensors_data[idx])
|
|
idx = inc(idx, sensors_data)
|
|
sleep(10)
|
|
|
|
# Start your thread
|
|
_thread.start_new_thread(send_env_data, ())
|
|
```
|
|
|
|
3. Upload the code into your device. Now your device is sending data to Pybytes.
|
|
|
|
{% hint style="info" %}
|
|
In this code, we're calling the function `pybytes.send_virtual_pin_value(persistent, pin, value))` to communicate with Pybytes. This function is part of the Pybytes library, and it has three arguments: `persistent`, `pin` and `value`.
|
|
|
|
* `persistent` denotes information that is infrequently accessed and not likely to be modified;
|
|
* `pin` represents which virtual pin is receiving data;
|
|
* `value` is the value being attributed to that particular pin
|
|
{% endhint %}
|
|
|
|
## Step 2: Add a signal from your device
|
|
|
|
Go to Pybytes.
|
|
|
|
1. On `Devices` page select a device;
|
|
|
|
|
|
|
|
2. On your device's page click on `Data` tab.
|
|
|
|
|
|
|
|
3. Click on the `Define New Signal` button.
|
|
|
|
|
|
|
|
4. Define the new signal by entering a number, a name, a data type and a unit. Finally, click on the button `Define`.
|
|
|
|
|
|
|
|
5. Your signal was added!
|
|
|
|
|
|
|
|
{% hint style="info" %}
|
|
The name and unit are labels used to identify your signal inside Pybytes \(In this example we defined `Sinwave` as the name of the signal and `Rad` as the unit\).
|
|
|
|
The signal number has to match the pin number that you defined on `pybytes.send_virtual_pin_value` function call, inside your `main.py` code \(In this example we defined `pin = 1`\);
|
|
|
|
The datatype also has to match the variable used as argument on `pybytes.send_virtual_pin_value` function call, inside your `main.py` code \(In this example our variable is a floating number; therefore we defined as a `Float32`\).
|
|
{% endhint %}
|
|
|
|
## Step 3: Add a widget for the signal
|
|
|
|
1. Click on the signal card.
|
|
|
|
|
|
|
|
2. Click on the button `Create a new display`.
|
|
|
|
|
|
|
|
3. Select the type of visualisation \(e.g. Bar chart or Line chart\).
|
|
|
|
|
|
|
|
4. You can adjust the parameters of your widget at `Settings`. After, click on the button `Create`.
|
|
|
|
|
|
|
|
5. Your widget was created. Now, add your widget to your device's dashboard. Click on the button `Edit` on your widget.
|
|
|
|
|
|
|
|
6. Mark the checkbox `Display on Dashboard` at `Settings`. Finally, click on the button `Save`.
|
|
|
|
|
|
|
|
7. Click on the tab `Dashboard`. Your widget was successfully added there!
|
|
|
|
|
|
|
|
## Step 4: Organise your dashboard
|
|
|
|
1. Click on the button `Organise`. Now the dashboard's grid will enter the edit mode and allow you to resize and reposition its widgets.
|
|
|
|
|
|
|
|
2. Resize a widget by clicking on the triangle icon at the bottom right corner of the widget and drag the cursor over the grid. After, click on the button `Save` to save this action.
|
|
|
|
|
|
|
|
3. Change the widget's position by drag-and-dropping it over the grid. After, click on the button `Save` to save this action.
|
|
|
|
|
|
|
|
## Done!
|
|
|
|
Now you've learned how to set up your device's dashboard to display data. Also, you can add more widgets to other pins of your device.
|
|
|