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 Smart_Farm 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 water pump cannot start.

  • Confirm that the power supply is stable and the water pump voltage should be 5V.

  • Confirm that the COM and GND pins of the relay module are shorted using jumper caps.

  • You can gently tap the relay module to engage its internal contacts, thus enabling it to be energized.

8.The water pump is unable to draw water or the waterwheel cannot rotate.

  • When installing water pipes, avoid bending them, as this will prevent water from flowing out; they should be installed in an arc shape.

  • A gap should be maintained between the positioning ring of the waterwheel and the waterwheel wheel; otherwise, the waterwheel wheel will jam and cannot rotate.

  • The installation position of the water pipes needs to be adjusted multiple times according to the water flow rate to ensure smooth rotation of the waterwheel.

9.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.

10.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.

11.Is the voice recognition module not recognizing your voice?

  • Please make sure the voice recognition module is connected correctly.

  • 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 “Ambient Light on,” “Ambient Light off,” “Fan on,” and “Fan off.”

  • Other unregistered voice commands will be invalid.