Continuously read data in real time with Flask + Python

Question

I want to read in a webapp some elements (CPU temperature, CPU usage, state of some sensors...) in real-time from my Raspberry Pi. I know Python instruction to do this, but I want to read these values (let's focus now only on CPU temperature, for example) from a PHP page in real-time, so continuously refreshing the page. I've found various methods on the internet, but there's here a SIMPLE mode to do this?

This is my code:

from flask import Flask, render_template

app = Flask(__name__)

@app.route('/')
def index():
    temp="There I'll put instructions..."
    return render_template("index.php", temp=temp)


if __name__ == '__main__':
    app.run(debug=True, host='0.0.0.0')

I'm using Flask, I want PHP only for the renderer (I'm also a newbie, tell me if I'm doing wrong usage of these words :) ) — G. Ianni, May 18 '17 at 21:15
It looks like you need to fetch a PHP-generated page from somewhere, parse it, and output your own page. Packages to consider are `requests` and `BeautifulSoup` (if it's a HTML page). — 9000, May 18 '17 at 21:22

score 1 · Answer 1 · answered May 18 '17 at 21:25

1

You could create a REST API using flask that will return sensor data upon request. Here's an example of what your server might look like:

@app.route('/sensor/<sensor>')
def get_sensor_data(sensor):
    sensor = sensor.lower()
    if sensor == 'cpu':
        sensor_data = cpu_sensor_data()
    elif sensor == 'ssd':
        sensor_data = ssd_sensor_data()
    # etc.

    return sensor_data

Your frontend would then need to make a request to an endpoint like http://domain_name.net/cpu and get the sensor data to display as needed.

answered May 18 '17 at 21:25

notorious.no

4,919
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Thanks, I want to do exactly this, but automatically... this is the question – G. Ianni May 18 '17 at 21:36
1

`` or something in your template.html – Joran Beasley May 18 '17 at 21:52

score 0 · Accepted Answer · answered May 18 '17 at 22:40

0

I simply resolved adding <body onload="location=''"> in the HTML code of PHP page.

answered May 18 '17 at 22:40

G. Ianni

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Continuously read data in real time with Flask + Python

2 Answers2