split AHT1x from AHT2x

Author: blakadder

docs/AHT1x.md

@@ -1,4 +1,4 @@
-# AHT1x/AHT2x and compatible temperature and humidity sensor
+# AHT10/AHT15 temperature and humidity sensor
 
 ??? failure "This feature is not included in precompiled binaries"  
 

docs/AHT2x.md

@@ -0,0 +1,48 @@
+# AHT2x/AM2301B temperature and humidity sensor
+
+??? failure "This feature is not included in precompiled binaries"  
+
+    When [compiling your build](Compile-your-build) add the following to `user_config_override.h`:
+    ```
+    #ifndef USE_AHT2x
+    #define USE_AHT2x       // [I2cDriver43] Enable AHT20/AM2301B instead of AHT1x humidity and temperature sensor (I2C address 0x38) (+0k8 code)
+    #endif
+    ```
+
+## Configuration
+
+### Wiring
+| AHT   | ESP |
+|---|---|
+|VCC   |3.3V
+|GND   |GND   
+|SDA   | GPIOx
+|SCL   | GPIOy
+
+
+### Tasmota Settings 
+In the **_Configuration -> Configure Module_** page assign:
+
+1. GPIOx to `I2C SDA`
+2. GPIOy to `I2C SCL`
+
+After a reboot the driver should detect the sensor and display sensor readings.
+
+### Troubleshooting
+On some I2C sensors, like the AHT25, Tasmota might mistake the sensor for another one using the same address.
+This can be resolved by disabling the unneeded drivers.
+
+For our example AHT25, the address might get confused with the VEML6070 UV sensor. You can tell Tasmota to use the other driver by issuing the following commands in the console:
+
+- `I2CDriver12 0` to disable the VEML driver
+- `I2CDriver43 1` to enable the AHT driver
+
+An overview of all [I2C drivers](https://tasmota.github.io/docs/I2CDEVICES/#supported-i2c-devices) is available in the docs.
+
+### Breakout Boards
+
+![AHT20](_media/peripherals/AHT20.jpg)![AHT21](_media/peripherals/AHT21.jpg)![AHT25](_media/peripherals/AHT25.jpg)![AM2301B](_media/peripherals/AM2301B.jpg)
+
+[AHT20 Datasheet](http://www.aosong.com/userfiles/files/media/Data%20Sheet%20AHT20.pdf)    
+[AHT21 Datasheet](http://www.aosong.com/userfiles/files/media/Data%20Sheet%20AHT21.pdf)
+[AHT25 Datasheet](http://www.aosong.com/userfiles/files/media/Data%20Sheet%20AHT25%20A2.pdf)

docs/Supported-Peripherals.md

@@ -6,9 +6,10 @@ Name|Description|Connection
 [**A4988**](A4988-Stepper-Motor-Controller)| Stepper Motor Controller 
 [**ADC**](ADC) | Analog input over A0 pin | analog
 **ADS111x** | A/D Converter | I^2^C
-[**AHT1x**](AHT1x.md)<BR>**AHT2x** | Asair AHT10/AHT15/AHT20/AHT21/AHT25/AM2301B Temperature and Humidity Sensor | I^2^C
+[**AHT1x**](AHT1x.md) | Asair AHT10/AHT15 Temperature and Humidity Sensor | I^2^C
+[**AHT2x**](AHT2x.md) | Asair AHT20/AHT21/AHT25/AM2301B Temperature and Humidity Sensor | I^2^C
 [**AM2301 / DHT21 <BR>AM2302 / DHT22<BR>AM2321**](AM2301) | Temperature and Humidity Sensor | gpio
-[**AM2301B**](AHT1x) | Temperature and Humidity Sensor<br><i>Use same driver as AHT2X</i>| I^2^C
+[**AM2301B**](AHT2x) | Temperature and Humidity Sensor<br><i>Use same driver as AHT2X</i>| I^2^C
 **AM2320** | Temperature and Humidity Sensor | gpio
 **AS608** | AS608 Optical and R503 Capacitive Fingerprint Sensor| serial
 [**AS3935**](AS3935) | Franklin Lightning Sensor| serial

docs/_media/peripherals/AHT20.jpg

@@ -198,6 +198,7 @@ nav:
     - Buzzer.md
     - A4988 stepper motor controller: A4988-Stepper-Motor-Controller.md
     - AHT1x.md
+    - AHT2x.md
     - AM2301 temperature and humidity sensor: AM2301.md
     - APDS-9960.md
     - AS3935.md