lib/unit: Add Unit MQ support.

Signed-off-by: [email protected] <[email protected]>

Author: Tinyu-Zhao

docs/en/refs/unit.mq.ref

@@ -0,0 +1,33 @@
+
+.. |MQ| image:: https://static-cdn.m5stack.com/resource/docs/products/unit/co2/co2_01.webp
+    :target: https://docs.m5stack.com/en/unit/co2
+    :height: 200px
+    :width: 200px
+
+.. |init.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/init.png
+
+.. |set_mq_mode.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/set_mq_mode.png
+.. |get_mq_mode.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/get_mq_mode.png
+.. |set_led_status.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/set_led_status.png
+.. |get_led_status.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/get_led_status.png
+.. |set_heat_time.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/set_heat_time.png
+.. |get_heat_time.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/get_heat_time.png
+.. |get_adc_value.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/get_adc_value.png
+.. |get_valid_tags.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/get_valid_tags.png
+.. |get_ntc_adc_value.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/get_ntc_adc_value.png
+.. |get_ntc_res_value.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/get_ntc_res_value.png
+.. |get_voltage.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/get_voltage.png
+.. |get_firmware_version.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/get_firmware_version.png
+.. |get_i2c_address.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/get_i2c_address.png
+.. |set_i2c_address.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/set_i2c_address.png
+
+.. |example.png| image:: https://static-cdn.m5stack.com/mpy_docs/unit/mq/example.png
+
+.. |mq_core2_example.m5f2| raw:: html
+
+    <a
+        href="https://uiflow2.m5stack.com/?example=https://raw.githubusercontent.com/m5stack/uiflow-micropython/develop/examples/unit/mq/mq_core2_example.m5f2"
+        target="_blank"
+    >
+        mq_core2_example.m5f2
+    </a>

docs/en/units/index.rst

@@ -74,9 +74,10 @@ Unit
     midi.rst
     minioled.rst
     miniscale.rst
-    tof90.rst
+    mq.rst
     mqtt.rst
     mqttpoe.rst
+    tof90.rst
     nbiot.rst
     nbiot2.rst
     ncir.rst

docs/en/units/mq.rst

@@ -0,0 +1,60 @@
+MQ Unit
+==========
+
+.. sku: U199
+
+.. include:: ../refs/unit.mq.ref
+
+This is the driver library of MQ Unit, which is used to obtain data from the
+MQ sensor.
+
+Support the following products:
+
+    |MQ|
+
+
+UiFlow2 Example
+---------------
+
+get MQ value
+^^^^^^^^^^^^^^^
+
+Open the |mq_core2_example.m5f2| project in UiFlow2.
+
+This example gets the MQ value of the MQ Unit and displays it on the screen.
+
+UiFlow2 Code Block:
+
+    |example.png|
+
+Example output:
+
+    None
+
+MicroPython Example
+-------------------
+
+get MQ value
+^^^^^^^^^^^^^^^
+
+This example gets the MQ value of the MQ Unit and displays it on the screen.
+
+MicroPython Code Block:
+
+    .. literalinclude:: ../../../examples/unit/mq/mq_core2_example.py
+        :language: python
+        :linenos:
+
+Example output:
+
+    None
+
+
+**API**
+-------
+
+MQUnit
+^^^^^^^^^
+
+.. autoclass:: unit.mq.MQUnit
+    :members: