全部mpy增加心知天气、网络请求、ds18x20

boards/default_src/micropython/origin/build/lib/ds18b20.py

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+# DS18x20 temperature sensor driver for MicroPython.
+# MIT license; Copyright (c) 2016 Damien P. George
+
+import onewire
+from machine import Pin
+from micropython import const
+
+_CONVERT    = const(0x44)
+_RD_SCRATCH = const(0xBE)
+_WR_SCRATCH = const(0x4E)
+
+class DS18X20:
+    __species = {}
+    __first_init = True
+    def __new__(cls, pin, *args, **kwargs):
+        if pin not in cls.__species.keys():
+            cls.__first_init = True
+            cls.__species[pin] = object.__new__(cls)
+        return cls.__species[pin]
+
+    def __init__(self, pin):
+        if self.__first_init:
+            self.__first_init = False
+            self._ow = onewire.OneWire(Pin(pin, pull=Pin.PULL_UP))
+            self._buf = bytearray(9)
+            self._roms =  self.scan()
+
+    def scan(self):
+        return [rom for rom in self._ow.scan() if rom[0] in (0x10, 0x22, 0x28)]
+
+    def convert_temp(self):
+        self._ow.reset(True)
+        self._ow.writebyte(self._ow.SKIP_ROM)
+        self._ow.writebyte(_CONVERT)
+
+    def read_scratch(self, rom):
+        self._ow.reset(True)
+        self._ow.select_rom(rom)
+        self._ow.writebyte(_RD_SCRATCH)
+        self._ow.readinto(self._buf)
+        if self._ow.crc8(self._buf):
+            raise Exception("CRC error")
+        return self._buf
+
+    def read_temp(self, rom):
+        buf = self.read_scratch(rom)
+        if rom[0] == 0x10:
+            if buf[1]:
+                t = buf[0] >> 1 | 0x80
+                t = -((~t + 1) & 0xFF)
+            else:
+                t = buf[0] >> 1
+            return t - 0.25 + (buf[7] - buf[6]) / buf[7]
+        else:
+            t = buf[1] << 8 | buf[0]
+            if t & 0x8000:  # sign bit set
+                t = -((t ^ 0xFFFF) + 1)
+            return t / 16
+
+    def temperature(self):
+        temp = []
+        self.convert_temp()
+        for rom in self._roms:
+            temp.append(round(self.read_temp(rom), 2))
+        return temp [0] if len(temp) == 1 else tuple(temp)