User Manual

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Then reboot with

sudo reboot.

Mount the device drivers and confirm whether the device is effective or not

sudo modprobe w1-gpio

sudo modprobe w1-therm

cd /sys/bus/w1/devices/

The result is as follows:

root@rasberrypi:/sys/bus/w1/devices# ls

28-00000495db35 w1_bus_master1

28-00000495db35 is an external temperature sensor device, but it may vary with every client.

This is the serial number of your ds18b20.

Step 4：Check the current temperature

cd 28-00000495db35

The result is as follows:

root@rasberrypi:/sys/bus/w1/devices/28-00000495db35# ls

driver id name power subsystem uevent w1_slave

cat w1_slave

The result is as follows:

root@raspberrypi:/sys/bus/w1_slave/28-00000495db35# cat w1_slave

a3 01 4b 46 7f ff 0d 10 ce : crc=ce YES

a3 01 4b 46 7f ff 0d 10 ce t=26187

The second line t=26187 is current temperature value. If you want to convert it to degree

Celsius, you can divide by 1000, that is, the current temperature is 26187/1000=26.187 ℃.

For C language users:

Step 2: Change directory and edit

cd /home/pi/SunFounder_SensorKit_for_RPi2/C/26_ds18b20/

nano ds18b20.c

Find the following line, replace "28-031467805fff" with your sensor address. Save and exit.

char* addr = "/sys/bus/w1/devices/28-031467805fff/w1_slave";

Step 6: Compile

gcc ds18b20.c