Ds18b20

About

Read and print the room temperature measured with a DS18B20 sensor.

Source code

#
# @section License
#
# The MIT License (MIT)
#
# Copyright (c) 2016-2017, Erik Moqvist
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without
# restriction, including without limitation the rights to use, copy,
# modify, merge, publish, distribute, sublicense, and/or sell copies
# of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
# This file is part of the Pumbaa project.
#

import binascii
import board
from drivers import Ds18b20, Owi

OWI = Owi(board.PIN_GPIO17)
DS18B20 = Ds18b20(OWI)

# Search for devices on the OWI bus.
print('Number of sensors:', OWI.search())

while True:
    # Taking a new temperature sample.
    DS18B20.convert()

    for device_id in DS18B20.get_devices():
        print('Device id: {}, Temperature: {}'.format(
            binascii.hexlify(device_id),
            DS18B20.get_temperature(device_id)))

The source code can also be found on Github in the examples/ds18b20 folder.

Build and run

Build and upload the application.

$ cd examples/ds18b20
$ make -s BOARD=<board> upload