Difference between revisions of "DS18B20"
(add rpi python code) |
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| Line 24: | Line 24: | ||
cat w1_slave | cat w1_slave | ||
</source> | </source> | ||
| + | |||
| + | |||
| + | <source lang="python"> | ||
| + | |||
| + | #!/usr/bin/env python | ||
| + | |||
| + | import time | ||
| + | import os | ||
| + | |||
| + | os.system("/sbin/modprobe w1-gpio") | ||
| + | os.system("/sbin/modprobe w1-therm") | ||
| + | |||
| + | try: | ||
| + | while True: | ||
| + | # tempfile = open("/sys/bus/w1/devices/28-000006f2f3e4/w1_slave") | ||
| + | tempfile = open("/sys/bus/w1/devices/28-80000028ac7c/w1_slave") | ||
| + | thetext = tempfile.read() | ||
| + | tempfile.close() | ||
| + | tempdata = thetext.split("\n")[1].split(" ")[9] | ||
| + | temperature = float(tempdata[2:]) | ||
| + | temperature = 9.0 / 5.0 * (temperature / 1000) + 32 | ||
| + | print temperature | ||
| + | |||
| + | time.sleep(1) | ||
| + | except KeyboardInterrupt: | ||
| + | pass | ||
| + | |||
| + | </source> | ||
| + | |||
===Resources=== | ===Resources=== | ||
Revision as of 15:32, 4 May 2017
DS18B20
Contents
DS18B20
Pinout
Resources
1-Wire at wikipedia.
Raspberry Pi
Schematic
Code
# add this line to /boot/config.txt
dtoverlay=w1-gpio
modprobe w1-gpio
modprobe w1-therm
# device directory
cd /sys/bus/w1/devices
ls -l
# cd to your unique DS18B20 identifier
cat w1_slave
#!/usr/bin/env python
import time
import os
os.system("/sbin/modprobe w1-gpio")
os.system("/sbin/modprobe w1-therm")
try:
while True:
# tempfile = open("/sys/bus/w1/devices/28-000006f2f3e4/w1_slave")
tempfile = open("/sys/bus/w1/devices/28-80000028ac7c/w1_slave")
thetext = tempfile.read()
tempfile.close()
tempdata = thetext.split("\n")[1].split(" ")[9]
temperature = float(tempdata[2:])
temperature = 9.0 / 5.0 * (temperature / 1000) + 32
print temperature
time.sleep(1)
except KeyboardInterrupt:
pass
Resources
