FAQ information added

README.rst

@@ -514,6 +514,7 @@ website, esphome command, etc)
 Additional information
 ======================
 
+- `FAQ <./docs/faq.rst>`_
 - `HaierProtocol <https://github.com/paveldn/HaierProtocol>`_
 - `Haier smart modules <./docs/haier_modules.rst>`_
 - `Haier protocol overview <./docs/protocol_overview.rst>`_

docs/additional_information.rst

@@ -1,6 +1,7 @@
 Additional information
 ======================
 
+- `FAQ <./docs/faq.rst>`_
 - `HaierProtocol <https://github.com/paveldn/HaierProtocol>`_
 - `Haier smart modules <./docs/haier_modules.rst>`_
 - `Haier protocol overview <./docs/protocol_overview.rst>`_

docs/faq.rst

@@ -1,37 +1,48 @@
 Frequently Asked Questions
 ==========================
 
-** Work in progress! **
-
 .. contents:: Table of Contents
 
 **Q:** Is there a list of supported models?
 -------------------------------------------
 
-**A:** No, Haier have a huge list of models and different models for different regions. Sometimes the same model can have different names depending on country where it sold. Beside that usually people sending me message about problems with component not when it works. The only way to know if your model is supported is to try it out.
+**A:** No, Haier has a wide range of models, and different models are available in different regions. Sometimes the same model can have different names depending on the country where it is sold. The only way to know if your model is supported is to try it out.
 
-**Q:** I want to buy a new AC, how can I be sure your component will support the selected model?
+**Q:** How can I be sure that your component will support the selected model when buying a new AC?
 ------------------------------------------------------------------------------------------------
 
-**A:** You can't until you try. The best way is to check user manual. Usually if AC is supporting ESP modules there will be information with which application native module works. So far all models that works with smartAir2, hOn and EVO application works with this component, sometimes you will need additional tuning.
+**A:** Unfortunately, there is no guarantee until you try it. The best way is to check the user manual. Usually, if the AC supports ESP modules, there will be information about which application the native module works with. So far, all models that work with smartAir2, hOn, and EVO applications also work with this component, although sometimes additional tuning may be required.
 
 **Q:** The component is not working, how can I troubleshoot it?
 ---------------------------------------------------------------
 
-**A:** You can start by checking the logs. If you see any errors, you can try to fix them. If you can't fix them, you can ask for help on the ESPHome Discord server.
+**A:** You can start by checking the logs. If you see any errors, you can try to fix them. If you are unable to fix them, you can ask for help on the ESPHome Discord server.
+
+**Q:** I am constantly seeing the warning "Component haier took a long time for an operation" in the logs, is this normal?
+----------------------------------------------------------------------------------------------------------------------
 
+**A:** Yes, this message has always been there, but in the latest versions, it was changed to a warning. This message is shown when the component is too busy processing something. The biggest delays are usually related to logging and operations with the web server. If you want to reduce the chance of seeing this message, you can decrease the log level to "warning". The warning level is sufficient for a fully working system. This message is usually not a problem but can indicate that some other component (like Wi-Fi) that should work in real-time is suffering from delays. For more information, refer to: https://github.com/esphome/issues/issues/4717
 
-**Q:** I am constantly seeing ... in the logs, is this normal?
---------------------------------------------------------------
+**Q:** I am seeing the warning "Answer handler error, msg=01, answ=03, err=7". What should I do?
+--------------------------------------------------------------------------------------------
 
-**A:** ToDo: add answer
+**A:** This warning means that the AC denied the control command. It can happen in two cases: either the AC is using a different type of control or the structure of the status packet is different. You can try using the `control_method: SET_SINGLE_PARAMETER`. If that doesn't help, you can try to figure out the size of different parts of the status packet using this method: `Haier protocol overview <./docs/protocol_overview.rst>`. If nothing helps, you can create an issue on GitHub.
 
 **Q:** My ESP is communicating with the AC, but I can't control it. Or I can control it, but my sensors show wrong information.
 -------------------------------------------------------------------------------------------------------------------------------
 
-**A:** You can try to change the protocol in the configuration. Sometimes the default protocol is not working correctly. You can also try to change the baud rate.
+**A:** Most likely, you have one of two problems: either the wrong control method or the wrong status packet structure. You can try using the `control_method: SET_SINGLE_PARAMETER`. If that doesn't help, you can try to figure out the size of different parts of the status packet using this method: `Haier protocol overview <./docs/protocol_overview.rst>`.
 
 **Q:** My AC has a cool feature that is not supported by your component. Can you add it?
 ----------------------------------------------------------------------------------------
 
-**A:** I can try, but I need more information about the feature.
+**A:** First, you need to figure out if the feature is supported by the serial protocol. There is some functionality that is supported only by the IR remote. The easiest way to check is by using the IR remote:
+- Start capturing logs from your ESP modules.
+- Wait 10 - 15 seconds.
+- Enable the feature using the remote.
+- Wait 10 - 15 seconds.
+- Disable the feature using the remote.
+- Wait 10 - 15 seconds.
+- Stop capturing logs.
+- Check the logs for changes in the status packet.
+If all messages that look like this "Frame found: type 02, data: 6D 01 ..." are the same, the feature you want to add is not supported by the serial protocol. If you see some changes in the status packet, you can create a feature request on GitHub with the logs you collected.