kopia lustrzana https://github.com/jamesgao/kiln_controller
71 wiersze
2.2 KiB
Python
71 wiersze
2.2 KiB
Python
import time
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import re
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import threading
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import datetime
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from collections import deque
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def temp_to_cone(temp):
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"""Convert the current temperature to cone value using linear interpolation"""
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cones = [600,614,635,683,717,747,792,804,838,852,884,894,900,923,955,984,999,1046,1060,1101,1120,1137,1154,1162,1168,1186,1196,1222,1240,1263,1280,1305,1315,1326,1346]
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names = [str(i).replace('-', '0') for i in range(-22,0)] + [str(i) for i in range(1, 14)]
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for i in range(len(cones)-1):
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low, high = cones[i], cones[i+1]
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if low <= temp < high:
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frac = (temp - low) / float(high - low)
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return names[i]+'.%d'%int(frac*10)
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return "13+"
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class Monitor(threading.Thread):
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def __init__(self, name="3b-000000182b57"):
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self.device = "/sys/bus/w1/devices/%s/w1_slave"%name
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self.history = deque(maxlen=1024)
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from Adafruit_alphanumeric import AlphaScroller
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self.display = AlphaScroller(interval=.4)
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self.display.start()
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super(Monitor, self).__init__()
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self.daemon = True
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self.running = True
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def _read_temp(self):
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with open(self.device, 'r') as f:
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lines = f.readlines()
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while lines[0].strip()[-3:] != 'YES':
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time.sleep(0.2)
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with open(self.device, 'r') as f:
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lines = f.readlines()
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match = re.match(r'^[0-9a-f\s]{27}t=(\d+)$', lines[1])
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if match is not None:
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return float(match.group(1)) / 1000.0
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def stop(self):
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self.running = False
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self.display.stop()
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@property
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def temperature(self):
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return self.history[-1][1]
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def run(self):
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while running:
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temp = self._read_temp()
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fahr = temp * 9. / 5. + 32.
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now = datetime.datetime.now()
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self.history.append((now, temp))
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text = list('%0.0f'%temp) + ['degree'] + list('C %0.0f'%fahr)+['degree'] + list("F")
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if 600 <= temp:
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text += [' ', ' ', 'cone']+list("%0.1f"%temp_to_cone(temp))
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text += ' '
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self.display.set_text(text, reset=False)
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if __name__ == "__main__":
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mon = Monitor()
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mon.start()
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try:
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mon.join()
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except KeyboardInterrupt:
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mon.stop() |