HiLetgo HC-12 433Mhz SI4438 വയർലെസ് സീരിയൽ പോർട്ട് മൊഡ്യൂൾ യൂസർ മാനുവൽ

1. ആമുഖം

This manual provides detailed instructions for the proper setup, operation, and maintenance of your HiLetgo HC-12 433Mhz SI4438 Wireless Serial Port Module. Please read this manual thoroughly before using the module to ensure optimal performance and longevity. The HC-12 module is a wireless serial communication module designed for reliable data transmission over distances up to 1000 meters.

2. ഉൽപ്പന്നം കഴിഞ്ഞുview

ചിത്രം 2.1: HiLetgo HC-12 Wireless Serial Port Module. This image displays the top view of the module, highlighting the SI4438 chip, other surface-mount components, and the attached spring antenna for wireless communication.

The HiLetgo HC-12 module is a highly integrated wireless data transmission module operating at 433MHz. It features the SI4438 RF chip and an STM8S003F3P6 microcontroller, providing a robust solution for wireless serial communication. It is designed to replace traditional wired serial connections or Bluetooth modules in applications requiring longer range and lower power consumption. The module comes with a spring antenna and supports various operating modes and configurable parameters.

3 പ്രധാന സവിശേഷതകൾ

• പ്രവർത്തന ആവൃത്തി: 433.4 - 473.0 MHz, with up to 100 communication channels.
• ദീർഘ ആശയവിനിമയ ദൂരം: Default range of approximately 1000 meters (adjustable).
• കുറഞ്ഞ വൈദ്യുതി ഉപഭോഗം: Default idle current of 16 mA.
• ഒതുക്കമുള്ള വലിപ്പം: Module dimensions are 27.8mm x 14.4mm x 4mm.
• ക്രമീകരിക്കാവുന്ന പരാമീറ്ററുകൾ: Supports setting of baud rate, communication channel, and transmit power.
• സോഫ്റ്റ്‌വെയർ അപ്‌ഗ്രേഡ് ചെയ്യാവുന്നത്: Module firmware can be updated.
• വൈഡ് വോളിയംtagഇ ശ്രേണി: Operates at 3.3V, with considerations for higher voltage power supplies during prolonged emission.

4 സാങ്കേതിക സവിശേഷതകൾ

5. സജ്ജീകരണ ഗൈഡ്

5.1 പിൻഔട്ട് ഡയഗ്രം

ചിത്രം 5.1: തിരികെ view of the HC-12 module, clearly showing the pin labels for VCC, GND, RXD, TXD, SET, and ANT connections.

The HC-12 module features six pins for connection. Refer to the diagram above for pin identification:

• വിസിസി: Power supply input (3.3V).
• GND: ഗ്രൗണ്ട് കണക്ഷൻ.
• RXD: Receive Data pin (connects to TXD of microcontroller).
• TXD: Transmit Data pin (connects to RXD of microcontroller).
• സജ്ജമാക്കുക: Configuration pin (pull low to enter AT command mode).
• എന്റ്: Antenna connection point (for external antenna if not using the spring antenna).

5.2 പവർ സപ്ലൈ കണക്ഷൻ

Connect the VCC pin to a 3.3V power source and GND to ground. If the module will be operating for extended periods in emission mode and your power supply voltage is greater than 4.5V, it is recommended to connect a 1N4007 diode in series with the VCC line to prevent overheating of the module's built-in LDO (Low Dropout Regulator).

5.3 Serial Communication Connection

Connect the TXD pin of the HC-12 module to the RXD pin of your microcontroller (e.g., Arduino, ESP32) and the RXD pin of the HC-12 module to the TXD pin of your microcontroller. Ensure that the logic levels are compatible (3.3V). If your microcontroller operates at 5V logic, use a logic level shifter for the RXD and TXD lines to prevent damage to the HC-12 module.

5.4 ആന്റിന കണക്ഷൻ

The module typically comes with a spring antenna pre-soldered. If you wish to use an external 433MHz antenna, ensure it is properly connected to the ANT pin. For optimal performance, the antenna should be positioned away from metal objects and other electronic components.

6. പ്രവർത്തന നിർദ്ദേശങ്ങൾ

6.1 Default Operation Mode

Out of the box, the HC-12 module operates in FU3 mode with a serial baud rate of 9600 BPS and communication channel CH001 (433.4 MHz). In this mode, the module acts as a transparent serial bridge, meaning any data sent to its serial input (RXD) will be transmitted wirelessly, and any data received wirelessly will be output through its serial output (TXD).

6.2 AT Command Mode for Configuration

To change the module's parameters (e.g., baud rate, communication channel, transmit power, operating mode), you need to enter AT command mode. This is done by pulling the SET pin low (connecting it to GND) before powering on the module, or by pulling it low while the module is already powered on (wait for a short delay after pulling low).

1. Enter AT Command Mode: Connect the SET pin to GND.
2. Connect to Serial Terminal: Use a USB-to-Serial converter (e.g., FTDI adapter) connected to your computer. Ensure the serial terminal is set to 9600 BPS (default for AT commands).
3. Send AT Commands:
   • AT: Returns "OK" if successful.
   • AT+Bxxxx: Sets the serial baud rate (e.g., AT+B115200).
   • AT+Cxxx: Sets the communication channel (e.g., AT+C005 for 433.8 MHz).
   • AT+FUx: Sets the operating mode (e.g., AT+FU1 for FU1 mode, AT+FU3 for FU3 mode).
   • AT+Px: Sets the transmit power (e.g., AT+P8 for +20dBm, AT+P1 for -1dBm).
   • AT+RX: Reads current parameters.
   • AT+DEFAULT: Resets to factory default settings.
4. Exit AT Command Mode: Disconnect the SET pin from GND. The module will then operate with the newly configured settings.

പ്രധാനപ്പെട്ടത്: Always ensure that both transmitting and receiving HC-12 modules are configured with the same communication channel and air baud rate for successful communication.

6.3 Operating Modes (FU1, FU2, FU3)

• FU1 (Low Power Mode): Suitable for applications requiring very low power consumption and shorter communication distances. Data transmission rate is lower.
• FU2 (Standard Mode): A balance between power consumption and communication distance/speed.
• FU3 (High Power/Long Range Mode): Default mode, offering the longest communication distance and highest transmit power. This mode has higher power consumption.

7. പരിപാലനം

The HiLetgo HC-12 module is designed for reliable operation with minimal maintenance. Follow these guidelines to ensure its longevity:

• പരിസ്ഥിതി വ്യവസ്ഥകൾ: Operate the module within its specified temperature and humidity ranges. Avoid exposure to extreme temperatures, moisture, or corrosive environments.
• ശാരീരിക കൈകാര്യം ചെയ്യൽ: Handle the module with care to prevent physical damage to components or solder joints. Avoid bending the antenna excessively.
• പവർ സപ്ലൈ സ്ഥിരത: സ്ഥിരവും വൃത്തിയുള്ളതുമായ വൈദ്യുതി വിതരണം ഉറപ്പാക്കുക. വാല്യംtage fluctuations can affect performance and potentially damage the module.
• വൃത്തിയാക്കൽ: If necessary, gently clean the module with a soft, dry brush or compressed air to remove dust. Do not use liquids or solvents.
• ആൻ്റിന പ്ലേസ്മെൻ്റ്: Ensure the antenna is not obstructed by metal objects, which can significantly reduce communication range.

8. പ്രശ്‌നപരിഹാരം

9. വാറൻ്റിയും പിന്തുണയും

For technical support, warranty inquiries, or any issues you may encounter with your HiLetgo HC-12 module, please contact HiLetgo directly. While specific warranty details are not provided in this manual, HiLetgo is committed to customer satisfaction.

You can find more information and support resources on the official HiLetgo website or by contacting their support team:

• Webസൈറ്റ്: www.hiletgo.com
• ഇമെയിൽ പിന്തുണ: support@hiletgo.com