On branch aht20_update

Updated to v2.0.0.
Supports thread safe I2C apis.

 Changes to be committed:
	modified:   CHANGELOG.md
	modified:   CMakeLists.txt
	modified:   README.md
	modified:   aht20.c
	modified:   idf_component.yml
	modified:   include/aht20.h
	deleted:    priv_include/aht20_reg.h
	deleted:    test_apps/CMakeLists.txt
	deleted:    test_apps/main/CMakeLists.txt
	deleted:    test_apps/main/Kconfig.projbuild
	deleted:    test_apps/main/aht20_test.c
	deleted:    test_apps/pytest_aht20.py
	deleted:    test_apps/sdkconfig.defaults

Author: jeetrohan

components/sensors/humiture/aht20/CHANGELOG.md

@@ -1,5 +1,9 @@
 # ChangeLog
 
+## v2.0.0 (2025-04-28
+
+* Updated to use thread safe i2c api.
+
 ## v1.0.0 (2024-08-09)
 
 * Added description of AHT30

components/sensors/humiture/aht20/CMakeLists.txt

@@ -1,9 +1,4 @@
 idf_component_register(
-    SRCS "aht20.c"
-    INCLUDE_DIRS "include"
-    PRIV_INCLUDE_DIRS "priv_include"
-    REQUIRES "driver"
-)
-
-include(package_manager)
-cu_pkg_define_version(${CMAKE_CURRENT_LIST_DIR})
+		    SRCS "aht20.c"
+                    INCLUDE_DIRS "include"
+		    REQUIRES "esp_driver_i2c" "esp_driver_gpio")

components/sensors/humiture/aht20/README.md

@@ -1,32 +1,91 @@
-[![Component Registry](https://components.espressif.com/components/espressif/aht20/badge.svg)](https://components.espressif.com/components/espressif/aht20)
+# aht20
+I2C driver for Aosong AHT20 humidity and temperature sensor using esp-idf.
+Tested with AHT20 using ESP32 and ESP32-S3 devkits.
 
-# Component: AHT20
-I2C driver and definition of AHT20 humidity and temperature sensor. 
+#Features
 
-Components compatible with AHT30 and AHT21 (AHT21 is deprecated).
+    Temperature and humidity measurement
 
-See [AHT20 datasheet](http://www.aosong.com/en/products-32.html), [AHT30 datasheet](http://www.aosong.com/en/products-131.html).
+    Thread-safe via esp-i2c-driver
 
+    CRC checksum verification (optional via menuconfig)
 
-## Usage
+    Configurable I2C clock speed (pre-compilation, not runtime,via menuconfig))
 
-### Initialization
-> Note: Note: You need to initialize the I2C bus first.
+    Unit tested 
+         
+         
+         ┌───────────────────┐
+         │    Application    │
+         └────────┬──────────┘
+                  │
+                  ▼
+         ┌───────────────────┐
+         │    AHT20 Driver   │
+         │ (this component)  │
+         └────────┬──────────┘
+                  │
+                  ▼
+         ┌───────────────────┐
+         │  esp-i2c-driver   │
+         └────────┬──────────┘
+                  │
+                  ▼
+         ┌───────────────────┐
+         │     I2C Bus       │
+         └────────┬──────────┘
+                  │
+                  ▼
+     ┌────────────────────────────┐
+     │ AHT20 Temperature/Humidity │
+     │          Sensor            │
+     └────────────────────────────┘
+
+
+
+# How To Use
+
+This driver includes a demo example project.
+
+    Follow the example to learn how to initialize the driver and read the sensor data.
+
+    All public APIs are documented in aht20.h.
+
+
+
+However, following are the general guiedlines.
 ```c
-    aht20_i2c_config_t i2c_conf = {
-        .i2c_port = I2C_MASTER_NUM,
-        .i2c_addr = AHT20_ADDRRES_0,
-    };
-    aht20_new_sensor(&i2c_conf, &handle);
+    //create a AHT20 device object and receive a device handle for it
+    // my_i2c_bus_handle is a preintialized i2c_master_bus_handle_t object
+    aht20_handle_t aht20_handle =  aht20_create( my_i2c_bus_handle, AHT20_ADDRESS_LOW ); //addresses are in aht.h
+
+    //use the previously created AHT20 device handle for initializing the associated device
+    aht20_init(aht20_handle);
+    
+    //read both humidity and temperature at once from device, using AHT20 device handle
+    aht20_read_humiture(aht20_handle); //Other public APIs are documented in AHT20.h.
+
+    //access the results stored in AHT20 device object, using the AHT20 device handle
+    //other apis require user to explicitly pass variable address to hold data
+    printf("tempertature = %.2fC  humidity = %.3f \n", aht20_handle->humiture.temperature, aht20_handle->humiture.humidity);
+
+    //to get reaw values create a object of following data type
+    aht20_raw_reading_t raw_value;
+    aht20_read_raw( aht20_handle, &raw_value);
+
+    printf("tempertature = %uC  humidity = %u \n", raw_value.temperature, raw_value.humidity);
 ```
 
-### Read data
-> The user can periodically call the aht20_read_temp_hum API to retrieve real-time data.
-```c
-    uint32_t temp_raw, hum_raw;
-    float temp, hum;
 
-    aht20_read_temp_hum(aht20, &temp_raw, &temp, &hum_raw, &hum);
-    ESP_LOGI(TAG, "Humidity      : %2.2f %%", hum);
-    ESP_LOGI(TAG, "Temperature   : %2.2f degC", temp);
-```
+# How to Configure CRC and I2C clock speed
+Additionaly, select in menuconfig under Component Config → AHT20,; to use CRC(default is not used)
+or change the clock speed of device (deault is 100KHz). 
+
+Note : It is recommended to use clock speeds in upper ranges of 100kHz to 200kHz.
+Higher clock speeds may cause occasional data inconsistencies depending on your board layout and wiring.
+
+![image](https://github.com/user-attachments/assets/fc8680fb-1567-477c-92f8-52dd126e6f9d)
+
+or 
+In sdkconfig under Component Config → AHT20,
+![image](https://github.com/user-attachments/assets/1f9612df-8d73-4ad1-bec7-75cbe6ed327a)