Adding ahtx0 code

aht20/ahtx0.py

@@ -0,0 +1,121 @@
+# The MIT License (MIT)
+#
+# Copyright (c) 2020 Kattni Rembor for Adafruit Industries
+# Copyright (c) 2020 Andreas Bühl
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+"""
+
+MicroPython driver for the AHT10 and AHT20 Humidity and Temperature Sensor
+
+Author(s): Andreas Bühl, Kattni Rembor
+
+"""
+
+import utime
+from micropython import const
+
+
+class AHT10:
+    """Interface library for AHT10/AHT20 temperature+humidity sensors"""
+
+    AHTX0_I2CADDR_DEFAULT = const(0x38)  # Default I2C address
+    AHTX0_CMD_INITIALIZE = 0xE1  # Initialization command
+    AHTX0_CMD_TRIGGER = const(0xAC)  # Trigger reading command
+    AHTX0_CMD_SOFTRESET = const(0xBA)  # Soft reset command
+    AHTX0_STATUS_BUSY = const(0x80)  # Status bit for busy
+    AHTX0_STATUS_CALIBRATED = const(0x08)  # Status bit for calibrated
+
+    def __init__(self, i2c, address=AHTX0_I2CADDR_DEFAULT):
+        utime.sleep_ms(20)  # 20ms delay to wake up
+        self._i2c = i2c
+        self._address = address
+        self._buf = bytearray(6)
+        self.reset()
+        if not self.initialize():
+            raise RuntimeError("Could not initialize")
+        self._temp = None
+        self._humidity = None
+
+    def reset(self):
+        """Perform a soft-reset of the AHT"""
+        self._buf[0] = self.AHTX0_CMD_SOFTRESET
+        self._i2c.writeto(self._address, self._buf[0:1])
+        utime.sleep_ms(20)  # 20ms delay to wake up
+
+    def initialize(self):
+        """Ask the sensor to self-initialize. Returns True on success, False otherwise"""
+        self._buf[0] = self.AHTX0_CMD_INITIALIZE
+        self._buf[1] = 0x08
+        self._buf[2] = 0x00
+        self._i2c.writeto(self._address, self._buf[0:3])
+        self._wait_for_idle()
+        if not self.status & self.AHTX0_STATUS_CALIBRATED:
+            return False
+        return True
+
+    @property
+    def status(self):
+        """The status byte initially returned from the sensor, see datasheet for details"""
+        self._read_to_buffer()
+        return self._buf[0]
+
+    @property
+    def relative_humidity(self):
+        """The measured relative humidity in percent."""
+        self._perform_measurement()
+        self._humidity = (
+            (self._buf[1] << 12) | (self._buf[2] << 4) | (self._buf[3] >> 4)
+        )
+        self._humidity = (self._humidity * 100) / 0x100000
+        return self._humidity
+
+    @property
+    def temperature(self):
+        """The measured temperature in degrees Celcius."""
+        self._perform_measurement()
+        self._temp = ((self._buf[3] & 0xF) << 16) | (self._buf[4] << 8) | self._buf[5]
+        self._temp = ((self._temp * 200.0) / 0x100000) - 50
+        return self._temp
+
+    def _read_to_buffer(self):
+        """Read sensor data to buffer"""
+        self._i2c.readfrom_into(self._address, self._buf)
+
+    def _trigger_measurement(self):
+        """Internal function for triggering the AHT to read temp/humidity"""
+        self._buf[0] = self.AHTX0_CMD_TRIGGER
+        self._buf[1] = 0x33
+        self._buf[2] = 0x00
+        self._i2c.writeto(self._address, self._buf[0:3])
+
+    def _wait_for_idle(self):
+        """Wait until sensor can receive a new command"""
+        while self.status & self.AHTX0_STATUS_BUSY:
+            utime.sleep_ms(5)
+
+    def _perform_measurement(self):
+        """Trigger measurement and write result to buffer"""
+        self._trigger_measurement()
+        self._wait_for_idle()
+        self._read_to_buffer()
+
+
+class AHT20(AHT10):
+    AHTX0_CMD_INITIALIZE = 0xBE  # Calibration command

aht20/main.py

@@ -0,0 +1,22 @@
+import time
+from machine import Pin, I2C
+
+import ahtx0
+
+I2C_A = I2C(scl=Pin(1), sda=Pin(2))
+
+# Create the sensor object using I2C
+sensor = ahtx0.AHT10(I2C_A)
+
+
+def celsius_to_fahrenheit(celsius: float):
+    return (celsius * (9 / 5)) + 32
+
+
+while True:
+    temp_c = sensor.temperature
+    temf_f = celsius_to_fahrenheit(temp_c)
+    raw_humidity = sensor.relative_humidity
+    print("\nTemperature: {:.2f} C / {:.2f} F".format(temp_c, temf_f))
+    print("Humidity: {:.2f} %".format(raw_humidity))
+    time.sleep(5)

requirements.in

@@ -3,3 +3,4 @@ esptool
 adafruit-ampy
 docopt
 black
+mpremote

requirements.txt

@@ -1,22 +1,72 @@
 #
-# This file is autogenerated by pip-compile
+# This file is autogenerated by pip-compile with Python 3.12
-# To update, run:
+# by the following command:
 #
 #    pip-compile requirements.in
 #
---trusted-host pypi.python.org
+adafruit-ampy==1.1.0
-
+    # via -r requirements.in
-adafruit-ampy==1.0.7
+bitarray==2.9.2
-appdirs==1.4.3            # via black
+    # via bitstring
-attrs==19.1.0             # via black
+bitstring==4.2.3
-black==18.9b0
+    # via esptool
-click==7.0                # via adafruit-ampy, black, pip-tools
+black==24.8.0
+    # via -r requirements.in
+build==1.2.1
+    # via pip-tools
+cffi==1.17.0
+    # via cryptography
+click==8.1.7
+    # via
+    #   adafruit-ampy
+    #   black
+    #   pip-tools
+cryptography==43.0.0
+    # via esptool
 docopt==0.6.2
-ecdsa==0.13               # via esptool
+    # via -r requirements.in
-esptool==2.6
+ecdsa==0.19.0
-pip-tools==3.4.0
+    # via esptool
-pyaes==1.6.1              # via esptool
+esptool==4.7.0
-pyserial==3.4             # via adafruit-ampy, esptool
+    # via -r requirements.in
-python-dotenv==0.10.1     # via adafruit-ampy
+intelhex==2.3.0
-six==1.12.0               # via pip-tools
+    # via esptool
-toml==0.10.0              # via black
+mpremote==1.23.0
+    # via -r requirements.in
+mypy-extensions==1.0.0
+    # via black
+packaging==24.1
+    # via
+    #   black
+    #   build
+pathspec==0.12.1
+    # via black
+pip-tools==7.4.1
+    # via -r requirements.in
+platformdirs==4.2.2
+    # via black
+pycparser==2.22
+    # via cffi
+pyproject-hooks==1.1.0
+    # via
+    #   build
+    #   pip-tools
+pyserial==3.5
+    # via
+    #   adafruit-ampy
+    #   esptool
+    #   mpremote
+python-dotenv==1.0.1
+    # via adafruit-ampy
+pyyaml==6.0.2
+    # via esptool
+reedsolo==1.7.0
+    # via esptool
+six==1.16.0
+    # via ecdsa
+wheel==0.44.0
+    # via pip-tools
+
+# The following packages are considered to be unsafe in a requirements file:
+# pip
+# setuptools

requirements.txt.bak

@@ -0,0 +1,22 @@
+#
+# This file is autogenerated by pip-compile
+# To update, run:
+#
+#    pip-compile requirements.in
+#
+--trusted-host pypi.python.org
+
+adafruit-ampy==1.0.7
+appdirs==1.4.3            # via black
+attrs==19.1.0             # via black
+black==18.9b0
+click==7.0                # via adafruit-ampy, black, pip-tools
+docopt==0.6.2
+ecdsa==0.13               # via esptool
+esptool==2.6
+pip-tools==3.4.0
+pyaes==1.6.1              # via esptool
+pyserial==3.4             # via adafruit-ampy, esptool
+python-dotenv==0.10.1     # via adafruit-ampy
+six==1.12.0               # via pip-tools
+toml==0.10.0              # via black