wiring diagrams updated for both 20-pin and 40-pin RPIs

Author: Mikey Sklar

Raspberry_Pi_DS18B20_Temperature_Sensing/ds18b20-basic-20pin.fzz

@@ -1,33 +1,16 @@
-import os
-import glob
+import board
 import time
 
-os.system('modprobe w1-gpio')
-os.system('modprobe w1-therm')
+from adafruit_onewire.bus import OneWireBus
+from adafruit_ds18x20 import DS18X20
 
-base_dir = '/sys/bus/w1/devices/'
-device_folder = glob.glob(base_dir + '28*')[0]
-device_file = device_folder + '/w1_slave'
+# Initialize one-wire bus on board pin D5.
+ow_bus = OneWireBus(board.D4)
 
-def read_temp_raw():
-    f = open(device_file, 'r')
-    lines = f.readlines()
-    f.close()
-    return lines
+# Scan for sensors and grab the first one found.
+ds18 = DS18X20(ow_bus, ow_bus.scan()[0])
 
-def read_temp():
-    lines = read_temp_raw()
-    while lines[0].strip()[-3:] != 'YES':
-        time.sleep(0.2)
-        lines = read_temp_raw()
-    equals_pos = lines[1].find('t=')
-    if equals_pos != -1:
-        temp_string = lines[1][equals_pos+2:]
-        temp_c = float(temp_string) / 1000.0
-        temp_f = temp_c * 9.0 / 5.0 + 32.0
-        return temp_c, temp_f
-    
+# Main loop to print the temperature every second.
 while True:
-    print(read_temp())  
-    time.sleep(1)
-
+    print('Temperature: {0:0.3f}C'.format(ds18.temperature))
+    time.sleep(1.0)