class WaterLevel:
def __init__(self, port):
self.port = port
self.uart = UART(port, 9600)
self.uart.init(9600,
timeout=10) # 9600, 1byte about 1ms, wait for 10ms
self.buffer = RingBuffer(10)
# return
# False: no change
# True: change, need read value
def Check(self):
count = self.uart.any()
if count < 3:
return False
# At lease 3 bytes in buffer (For example:0mm)
value_change = None
while 1: # maybe too many data in UART RX buffer
data = self.uart.readline()
if data:
number_string = re.search(b'^\d+', data)
if number_string:
number = int(number_string.group(0))
value_change = self.buffer.InsertData(number, True)
else:
break
return value_change
def GetValue(self):
return self.buffer.GetAverage()
class TempSensor:
def __init__(self, pin):
self.check_ticks_ms = 0
self.ds = DS18X20(OneWire(Pin(pin)))
self.rom = None
self.buffer = RingBuffer(6)
self.state = DS_IDEL
roms = self.ds.scan()
if roms:
self.rom = roms[0]
UI.LogOut(str(self.rom))
def Start(self):
# Wait for 1000ms(1s) to start
if self.state != DS_IDEL:
return
if time.ticks_diff(time.ticks_ms(), self.check_ticks_ms) < 1000:
return
if self.rom:
self.ds.convert_temp()
self.state = DS_START
self.check_ticks_ms = time.ticks_ms()
def Check(self):
if self.rom is None:
return None
# Need wait for 750ms(800ms) after start
if self.state != DS_START:
return False
if time.ticks_diff(time.ticks_ms(), self.check_ticks_ms) < 800:
return False
try:
value = int(self.ds.read_temp(self.rom) * 100)
except:
UI.LogOut("Read DS18B20 failed!")
return False
else:
value_change = self.buffer.InsertData(value, True)
self.state = DS_IDEL
return value_change
def GetValue(self):
return self.buffer.GetAverage()
