micropython/drivers: Add "sht3x" sensor driver.

Author: wemos

micropython/drivers/sensor/sht3x/manifest.py

@@ -0,0 +1 @@
+module("sht3x.py", opt=3)

micropython/drivers/sensor/sht3x/sht3x.py

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+# SHT3x driver for MicroPython on ESP8266/ESP32
+# MIT license; Copyright (c) 2022 WEMOS.CC
+
+import utime
+
+
+class SHT3X:
+    def __init__(self, i2c, address=0x45):
+        self.bus = i2c
+        self.slv_addr = address
+        self.buf = bytearray(6)
+
+    def measure(self):
+        self.bus.writeto(self.slv_addr, b"\x24\x00")
+        utime.sleep(1)
+        self.buf = self.bus.readfrom(self.slv_addr, 6)
+
+    def humidity(self):
+        humidity_raw = self.buf[3] << 8 | self.buf[4]
+        humidity = 100.0 * float(humidity_raw) / 65535.0
+        return humidity
+
+    def temperature(self):
+        temperature_raw = self.buf[0] << 8 | self.buf[1]
+        temperature = (175.0 * float(temperature_raw) / 65535.0) - 45
+        return temperature