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rasberry piで水温測定

Last updated at Posted at 2018-12-22

配線

防水の温度計をラズパイへそれぞれ以下のように配線

  • 白ケーブル → GPIO4 (Pin09)
  • 黒ケーブル → Gnd (Pin07)
  • 赤ケーブル → 5V (Pin02)

認識

$ sudo apt-get update
$ sudo apt-get upgrade
$ echo "dtoverlay=w1-gpio-pullup,gpiopin=4" | sudo tee -a /boot/config.txt
$ sudo reboot

カーネルモジュール

$ sudo modprobe w1-gpio
$ sudo modprobe w1-therm
$ sudo shutdown -r now

結果取得

$ cd /sys/bus/w1/devices
$ ls
28-01146560e2ff w1_bus_master1
$ cd 28-01146560e2ff
$ grep t= w1_slave | awk -F"t=" '{print $2}'

P8230551.JPG

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