HC-12 433MHz SI4438 Long-Range Wireless Serial UART Transceiver Module

HC-12 433MHz SI4438 Long-Range Wireless Serial UART Transceiver Module The HC-12 is a compact wireless serial communication module designed for transparent UART data transmission between microcontrollers, development boards, embedded systems, and other TTL serial devices. This version uses the Silicon Labs Si4438 RF transceiver together with the STMicroelectronics STM8S003F3P6 microcontroller . The module operates across the 433.4MHz to 473.0MHz frequency range and supports up to 100 selectable communication channels with 400kHz channel spacing. It provides a maximum transmission power of up to 100mW or 20dBm and can achieve long-distance communication in open areas when suitable antennas, settings, and power conditions are used. Key Features Si4438 Sub-GHz RF transceiver. STM8S003F3P6 onboard microcontroller. 433.4MHz to 473.0MHz operating frequency range. 100 selectable wireless channels. 400kHz channel spacing. Maximum RF output power up to 20dBm or 100mW. Simple TTL UART interface using TXD and RXD pins. Transparent wireless serial data transmission. Configurable using AT commands. Supports FU1, FU2, FU3, and FU4 operating modes. IPEX antenna connector and soldering point for a spring antenna. Communication distance of up to approximately 1km in open areas under suitable conditions. Pin Configuration VCC: Module power input. GND: Ground connection. TXD: UART serial data output. RXD: UART serial data input. SET: Used to enter AT command configuration mode. Typical Applications Wireless communication between Arduino boards and microcontrollers. Remote sensor and telemetry systems. Wireless data logging. Industrial monitoring and control systems. Home automation projects. Remote control and embedded communication applications. Important: Communication range depends on the antenna type, transmission power, baud rate, power supply quality, surrounding interference, obstacles, and environmental conditions. موديول اتصال لاسلكي سيريال HC-12 بتردد 433MHz وشريحة SI4438 موديول HC-12 هو وحدة اتصال لاسلكي صغيرة الحجم مصممة لنقل بيانات UART بصورة شفافة بين المتحكمات الدقيقة وبوردات التطوير والأنظمة المدمجة والأجهزة التي تعمل بواجهة TTL Serial. تعتمد هذه النسخة على شريحة الاتصال اللاسلكي Silicon Labs Si4438 مع المتحكم STM8S003F3P6 من شركة STMicroelectronics. يعمل الموديول في نطاق تردد من 433.4MHz إلى 473.0MHz، ويدعم حتى 100 قناة اتصال قابلة للاختيار بفاصل 400kHz بين القنوات. تصل قدرة الإرسال القصوى إلى 100mW أو 20dBm، ويمكنه تحقيق مسافات اتصال طويلة في الأماكن المفتوحة عند استخدام هوائي مناسب وإعدادات صحيحة ومصدر تغذية مستقر. أهم المميزات شريحة اتصال لاسلكي Sub-GHz من نوع Si4438. متحكم STM8S003F3P6 مدمج على البوردة. نطاق تشغيل من 433.4MHz إلى 473.0MHz. يدعم 100 قناة اتصال لاسلكية قابلة للاختيار. فاصل تردد 400kHz بين القنوات. قدرة إرسال قصوى تصل إلى 20dBm أو 100mW. واجهة UART TTL بسيطة من خلال أطراف TXD وRXD. نقل بيانات سيريال لاسلكي بصورة شفافة. إمكانية ضبط الإعدادات باستخدام أوامر AT. يدعم أوضاع التشغيل FU1 وFU2 وFU3 وFU4. مزود بموصل هوائي IPEX ونقطة لحام لهوائي سوستة. مسافة اتصال قد تصل إلى حوالي 1 كيلومتر في الأماكن المفتوحة وتحت الظروف المناسبة. أطراف التوصيل VCC: دخل تغذية الموديول. GND: الطرف الأرضي. TXD: خرج بيانات UART. RXD: دخل بيانات UART. SET: يستخدم للدخول إلى وضع ضبط الإعدادات بأوامر AT. الاستخدامات الاتصال اللاسلكي بين بوردات Arduino والمتحكمات الدقيقة. أنظمة الحساسات والقياسات عن بعد. تسجيل البيانات لاسلكيًا. أنظمة المراقبة والتحكم الصناعية. مشروعات المنازل الذكية. تطبيقات الريموت كنترول والأنظمة المدمجة. تنبيه: مسافة الاتصال الفعلية تعتمد على نوع الهوائي وقدرة الإرسال وسرعة الاتصال وجودة مصدر التغذية والعوائق والتداخلات والظروف المحيطة.

Wireless Transceiver Serial UART (1km Range) HC-12 HC-12 wireless serial port communication module is a new-generation multichannel embedded wireless data transmission module. Its wireless working frequency band is 433.4-473.0MHz, multiple channels can be set, with the stepping of 400KHz, and there are totally 100 channels. The maximum transmitting power of module is 100mW (20dBm), the receiving sensitivity is -117dBm at baud rate of 5,000bps in the air, and the communication distance is 1,000m in open space. The module is encapsulated with stamp hole, can adopt patch welding, and its dimension is 27.8mm×14.4mm×4mm (including antenna cap, excluding spring antenna), so it is very convenient for customers to go into application system. There is a PCB antenna pedestal ANT1 on the module, and user can use external antenna of 433M frequency band through coaxial cable; there is also an antenna solder eye ANT2 in the module, and it is convenient for user to weld spring antenna. User could select one of these antennas according to use requirements. There is MCU inside the module, and user don’t need to program the module separately, and all transparent transmission mode is only responsible for receiving and sending serial port data, so it is convenient to use. The module adopts multiple serial port transparent transmission modes, and user could select them by AT command according to use requirements. The average working current of three modes FU1, FU2 and FU3 in idle state is 80μa, 3.6mA an 16mA respectively, and the maximum working current is 100mA (in transmitting state). Features Long-distance wireless transmission (1,000m in open space/baud rate 5,000bps in the air) Working frequency range (433.4-473.0MHz, up to 100 communication channels) Maximum 100mW (20dBm) transmitting power (8 gears of power can be set) Three working modes, adapting to different application situations Built-in MCU, performing communication with external device through serial port The number of bytes transmitted unlimited to one time Specifications Working frequency: 433.4MHz to 473.0MHz Supply voltage: 3.2V to 5.5VDC Communication distance: 1,000m in the open space Serial baud rate: 1.2Kbps to 115.2Kbps（default 9.6Kbps） Receiving sensitivity: -117dBm to -100dBm Transmit power: -1dBm to 20dBm Interface protocol: UART/TTL Operating temperature: -40℃ to +85℃ Dimensions: 27.8mm x 13mm x 2mm Application Sensor Networks / Data collection Wireless metering Access control / Identity discrimination IT home appliance Smart house products / Security Systems Remote control / Remote measurement system Weather stations Typical Application When setting a RF serial data communication between microcontrollers or a microcontroller to PC, the RF modem is most useful and easy to implement. Pin definition VCC = Regulated 3.3V or 5V supply input of at least 200mA current capacity. GND = Ground level of power supply. Must be common ground with microcontroller. RXD = Receive Input: Input serial data of 3 to 5V logic level, Usually connected to TXD pin of microcontrollers UART TXD = Transmit Output: Output serial data of 3 to 5V logic level, Usually connected to RXD pin of microcontrollers UART SET = Setting Mode (Internally Pulled High) – Leave floating(High) is normal mode. To enter config mode pull the pin low either from switch or external MCU and send AT commands to configure. Package Included: 1 X HC-12 SI4438 Module 1 X Antenna Links: SI4438 Datasheet