Frequently Asked Questions ========================= *1.Smart home features are not responding.* - Please use six AA batteries for power. Check that the battery charge is sufficient and ensure the battery voltage is above 7.5V. - Please check that the wiring is correct. The ESP32 development board does not come pre-installed with smart home software. You will need to upload the appropriate software to enable these features. ---- *2.The development board is not recognized or the program cannot be burned.* - Please make sure the CH340 driver is correctly installed on your computer. - Use a Type-C data cable （make sure it supports data transmission, not just charging）. - Open the Device Manager and check if the "USB-SERIAL CH340" device appears. - If the port number is occupied, reconnect the USB or restart the computer. ---- *3.If flashing the firmware using the Arduino IDE fails, please follow these steps to troubleshoot:* - Check the power supply and connections: Ensure the power supply is stable and the USB cable and interface are securely connected. - Confirm the development board model: Select the correct development board model in the menu - Tools → Board → ESP32 Dev Module. - Import necessary libraries: Ensure that all required libraries for the example programs are correctly imported. - Check the serial port settings: Select the correct serial port number （e.g., COM4） in Tools → Port. ---- *4.The serial monitor output is garbled.* - Please set the serial port baud rate to 115200 baud in the Arduino IDE. - If garbled characters persist, please confirm that the line "Serial.begin（115200）;" in the example code is consistent. ---- *5.Unable to connect to the App.* - Please make sure your phone and ESP32 are on the same Wi-Fi network. - Check that the IP address displayed on the LCD1602 screen matches the IP address entered in the app. - If the connection fails, try powering the ESP32 again; the IP address will be reassigned. - Check whether your router has a firewall or isolation mode enabled. - Enable the app's Internet access permission in "Settings → Wi-Fi & Cellular Data" on your phone. ---- *6.App operation delays or unresponsiveness.* - Please ensure a stable WiFi signal. - If the connection is poor, reconnect to WiFi or move closer to the router. It is recommended to use the kit within 3 meters of the router. - If the device remains unresponsive for an extended period, press the "RST" button on the ESP32 to reboot the system. ---- *7.The servo is not moving or is trembling.* - Confirm that the power supply is stable and the servo voltage should be 5V. - Avoid sharing USB power for multiple servos; use separate battery packs or external power supplies. - Check that the signal cables are correctly connected to the corresponding GPIOs （e.g., GPIO4 for window servos and GPIO13 for door servos）. ---- *8.If the sensor detects abnormal data, please check the following* - Confirm that the sensor's wiring port matches the pin number defined in the code. - Ensure that the sensor surface is free of dust, stains, or foreign objects. Keep it clean to ensure accurate detection. ---- *9.If the LCD1602 screen brightness is low or there is no display, please check the following.* - Use an external battery for power. USB power may cause insufficient voltage, resulting in low screen brightness or no display. - Ensure the battery voltage is above 7.5V. If the voltage is lower than this, it is recommended to replace the battery promptly to ensure normal operation of the system. ---- *10.Is the voice recognition module not recognizing your voice?* - Please make sure the voice recognition module is connected correctly. - The baud rate should be set to 115200. - Please use it in a quiet environment and ensure that it is within 0.5 meters of the microphone. - This module only supports fixed commands, such as "Light on," "Light off," "Fan on," and "Fan off." - Other unregistered voice commands will be invalid. ---- *11.The app cannot connect to the ESP32 development board/cannot be controlled using the app.* - If you are using the Arduino IDE to program:Please confirm that you have changed the WiFi name and password in the code to your own network information. - If you are using Espressif's official programming tool:Please confirm that you have correctly configured the WiFi according to the network configuration tutorial. - If you still cannot connect:It is recommended to power cycle the device and then try connecting again. *If you encounter other problems or cannot solve them yourself, please contact the after-sales technical support team and we will provide you with assistance in a timely manner.*