I want to display current temperature on a webpage.
I'm using Raspberry Pi 3 in Jessie.
I'm using Chromium as browser.
I placed the python script inside a loop for a countdown timer. I then trigger it every 5 seconds. I accompanied it with console.log("here") to check if the function is looping. It displays numerous "here" but I only get one value
- I have tried
<?php shell_exec('sudo python /var/www/html/31856.py'); ?>
The script adds temperature to a Mysql table but it only runs after I refresh the page. - I have tried
var tout = <?php echo shell_exec('sudo python /var/www/html/31856.py'); ?>console.log(tout);The script displays the temperature and is looping however the value does not change from the first value. It only change after refresh
1 & 2 is running (it gets temp value) and there is no error on /var/log/apache2 but it I can't get it to pass real time values.
Here are the codes:
1.
#!/usr/bin/env python
from Adafruit_MAX31856 import max31856
import RPi.GPIO as GPIO
sensor = max31856.max31856(csPin=8, misoPin=9, mosiPin=10, clkPin=11)
thermoTempC = sensor.readJunctionTemp()
st = "%.2f" % thermoTempC
print st
GPIO.cleanup()
2. #!/usr/bin/env python
from Adafruit_MAX31856 import max31856
from datetime import datetime
import RPi.GPIO as GPIO
import MySQLdb
import time
db = MySQLdb.connect(host="192.168.1.10", user="root", passwd="root", db="test")
cur = db.cursor()
data = ""
thermoTempC = 0.00
def send_temp():
try:
rt = "%.2f" % thermoTempC
cur.execute("""INSERT INTO log (Cntl_Id, Temperature) VALUES (%s, %s)""", ("C01", rt))
#print("Write to DB. Success")
#print rt
db.commit()
except:
db.rollback()
try:
cur.execute("""SELECT Status FROM controller WHERE Number='C01'""")
data = cur.fetchone()[0]
#print data
db.commit()
except:
db.rollback()
if str(data) == "1":
sensor = max31856.max31856(csPin=8, misoPin=9, mosiPin=10, clkPin=11)
thermoTempC = sensor.readJunctionTemp()
send_temp()
GPIO.cleanup()
Looping function
function timer(seconds) {
var h = Math.floor(seconds / 3600), m = Math.floor(seconds / 60) % 60, s = seconds % 60;
if (h < 10) { h = "0" + h; }
if (m < 10) { m = "0" + m; }
if (s < 10) { s = "0" + s; }
if (seconds >= 0) {
if ((seconds % 5) == 0) {
//var tout = 0;
//console.log(tout);
var tout = <?php echo shell_exec('sudo python /var/www/html/31856.py'); ?>
console.log(tout);
console.log("get temp");
}
$("#remaining_time").val(h + ":" + m + ":" + s);
}
else
{
$("#remaining_time").val("00:00:00");
}
}
