Merge pull request #11 from jposada202020/fixing_resolution_setting

fixing resolutions

Author: tannewt

adafruit_htu31d.py

@@ -163,7 +163,9 @@ def measurements(self) -> Tuple[float, float]:
             i2c.write(self._buffer, end=1)
 
         # wait conversion time
-        time.sleep(0.02)
+        # Changed as reading temp and hum at OS3 is 20.32 ms
+        # See datasheet Table 5
+        time.sleep(0.03)
 
         self._buffer[0] = _HTU31D_READTEMPHUM
         with self.i2c_device as i2c:
@@ -202,7 +204,7 @@ def humidity_resolution(self) -> Literal["0.020%", "0.014%", "0.010%", "0.007%"]
 
         """
 
-        return _HTU31D_HUMIDITY_RES[self._conversion_command >> 4 & 3]
+        return _HTU31D_HUMIDITY_RES[self._conversion_command >> 3 & 3]
 
     @humidity_resolution.setter
     def humidity_resolution(
@@ -212,9 +214,9 @@ def humidity_resolution(
             raise ValueError(
                 f"Humidity resolution must be one of: {_HTU31D_HUMIDITY_RES}"
             )
-        register = self._conversion_command & 0xCF
+        register = self._conversion_command & 0xE7
         hum_res = _HTU31D_HUMIDITY_RES.index(value)
-        self._conversion_command = register | hum_res << 4
+        self._conversion_command = register | hum_res << 3
 
     @property
     def temp_resolution(self) -> Literal["0.040", "0.025", "0.016", "0.012"]:
@@ -229,7 +231,7 @@ def temp_resolution(self) -> Literal["0.040", "0.025", "0.016", "0.012"]:
 
         """
 
-        return _HTU31D_TEMP_RES[self._conversion_command >> 2 & 3]
+        return _HTU31D_TEMP_RES[self._conversion_command >> 1 & 3]
 
     @temp_resolution.setter
     def temp_resolution(
@@ -239,9 +241,9 @@ def temp_resolution(
             raise ValueError(
                 f"Temperature resolution must be one of: {_HTU31D_TEMP_RES}"
             )
-        register = self._conversion_command & 0xF3
+        register = self._conversion_command & 0xF9
         temp_res = _HTU31D_TEMP_RES.index(value)
-        self._conversion_command = register | temp_res << 2
+        self._conversion_command = register | temp_res << 1
 
     @staticmethod
     def _crc(value) -> int:

examples/htu31d_setting_resolutions.py

@@ -2,6 +2,7 @@
 #
 # SPDX-License-Identifier: MIT
 
+import time
 import board
 import adafruit_htu31d
 
@@ -15,16 +16,34 @@
 print("Temperature Resolution: ", htu.temp_resolution)
 print("Humidity Resolution: ", htu.humidity_resolution)
 
-
 # Setting the temperature resolution.
 # Possible values are "0.040", "0.025", "0.016" and "0.012"
-htu.temp_resolution = "0.016"
+htu.temp_resolution = "0.040"
 
 # Setting the Relative Humidity resolution.
 # Possible values are "0.020%", "0.014%", "0.010%" and "0.007%"
-htu.humidity_resolution = "0.007%"
-
+htu.humidity_resolution = "0.020%"
 
-# Printing the New Values
 print("Temperature Resolution: ", htu.temp_resolution)
 print("Humidity Resolution: ", htu.humidity_resolution)
+
+hum_res = ["0.020%", "0.014%", "0.010%", "0.007%"]
+temp_res = ["0.040", "0.025", "0.016", "0.012"]
+
+while True:
+    for humidity_resolution in hum_res:
+        htu.humidity_resolution = humidity_resolution
+        print(f"Current Humidity Resolution: {humidity_resolution}")
+        for _ in range(2):
+            print(f"Humidity: {htu.relative_humidity:.2f}")
+            print(f"Temperature: {htu.temperature:.2f}")
+            print("")
+            time.sleep(0.5)
+    for temperature_resolution in temp_res:
+        htu.temp_resolution = temperature_resolution
+        print(f"Current Temperature Resolution: {temperature_resolution}")
+        for _ in range(2):
+            print(f"Humidity: {htu.relative_humidity:.2f}")
+            print(f"Temperature: {htu.temperature:.2f}")
+            print("")
+            time.sleep(0.5)