mehrere ds18b20 Sensoren mit dem 1wire bricklet auslesen? (python)

[DrJoe]

Hallo,

wie muss denn der python code aussehen, wenn mehrere ds18b20 Sensoren mit dem 1wire bricklet ausgelesen werden sollen?

Ich bin leider etwas ratlos

 

#!/usr/bin/env python
# -*- coding: utf-8 -*-

HOST = "localhost"
PORT = 4223
UID = "GGW" # Change XYZ to the UID of your One Wire Bricklet GGW

import time

from tinkerforge.ip_connection import IPConnection
from tinkerforge.bricklet_one_wire import BrickletOneWire

if __name__ == "__main__":
    ipcon = IPConnection() # Create IP connection
    ow = BrickletOneWire(UID, ipcon) # Create device object

    ipcon.connect(HOST, PORT) # Connect to brickd
    # Don't use device before ipcon is connected

    ow.write_command(0, 78) # WRITE SCRATCHPAD
    ow.write(0) # ALARM H (unused)
    ow.write(0) # ALARM L (unused)
    ow.write(127) # CONFIGURATION: 12 bit mode

    # Read temperature 10 times
    for i in range(5):
        ow.write_command(0, 68) # CONVERT T (start temperature conversion)
        time.sleep(1) # Wait for conversion to finish
        ow.write_command(0, 190) # READ SCRATCHPAD

        t_low = ow.read().data
        t_high = ow.read().data
        print('Temperature: {0} °C'.format((t_low | (t_high << ) / 16.0))
        print('Temperature1: {0} °C'.format((t_low | (t_high << ) / 16.0))#??

    raw_input("Press key to exit\n") # Use input() in Python 3
    ipcon.disconnect()

Vielen Dank für die Hilfe

[borg]

Das ist gar nicht so schwierig. Du holst dir zuerst per "search_bus" die IDs der ganzen Sensoren:

ids = ow.search_bus().identifier

 

Dann kannst du auf die einzelnen Sensoren zugreifen in dem du bei jedem "write_command" die id anstatt 0 überträgst, z.B.:

ow.write_command(ids[0], 78) 

 

 

[DrJoe]

das mit den ids hat funktioniert,

 

und wie soll der print befehl für den folgenden sensor geschrieben werden?

Verstehe nicht, was in der {0} zu stehen hat inder zeile print.

#!/usr/bin/env python
# -*- coding: utf-8 -*-

HOST = "localhost"
PORT = 4223
UID = "GGW" # Change XYZ to the UID of your One Wire Bricklet GGW

import time

from tinkerforge.ip_connection import IPConnection
from tinkerforge.bricklet_one_wire import BrickletOneWire

if __name__ == "__main__":
    ipcon = IPConnection() # Create IP connection
    ow = BrickletOneWire(UID, ipcon) # Create device object

    ipcon.connect(HOST, PORT) # Connect to brickd
    # Don't use device before ipcon is connected

    ids = ow.search_bus().identifier      
    print ids
    ow.write_command(15348569994255425064L, 78) # WRITE SCRATCHPAD
    ow.write_command(14772109243647972136L, 78)


    
    ow.write(0) # ALARM H (unused)
    ow.write(0) # ALARM L (unused)
    ow.write(127) # CONFIGURATION: 12 bit mode

    # Read temperature 2 times
    for i in range(2):
        ow.write_command(15348569994255425064L, 68) 
        ow.write_command(14772109243647972136L, 68)        
        
        time.sleep(1) # Wait for conversion to finish
        ow.write_command(15348569994255425064L, 190) # READ SCRATCHPAD
        ow.write_command(14772109243647972136L, 190)       

        t_low = ow.read().data
        t_high = ow.read().data
        print('Temperature: {0} °C'.format((t_low | (t_high << ) / 16.0))
        print('Temperature1: {0} °C'.format((t_low | (t_high << ) / 16.0))





    #raw_input("Press key to exit\n") # Use input() in Python 3
    ipcon.disconnect()

 

als Ergebnis bekomme ich:

(15348569994255425064L, 14772109243647972136L)
Temperature: 17.3125 °C
Temperature1: 17.3125 °C
Temperature: 17.3125 °C
Temperature1: 17.3125 °C

 

Vielen Dank