{"product_id":"hc-12-v4-0-si4438-wireless-module-1km-long-distance-433-4-483-8mh-wireless-serial-port-board-built-in-mcu-uart-interface-4-5kb-s","title":"HC-12 V4.0 SI4438 wireless module 1KM long distance 433.4-483.8MH wireless serial port board Built-in MCU UART interface 4-5KB\/s","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eAideepen\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eCertification\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eCE,RoHS\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eChoice\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eyes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eDIY Supplies\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eElectrical\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eData Record\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eYes\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eElectronic\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNo\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFeature\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eSI4438 Wireless Serial Communication Module\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eFunction\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eHC-12 SI4438 wireless module 1KM long distance 433MHz wireless serial port module UART interface\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-concerned chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003enone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMaterial\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eOther Metal\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eModel Number\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eHC-12 V4.0 SI4438 Wireless Serial Communication Module\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eProduct Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eHC-12 SI4438 433Mhz Wireless Serial Port Module 1000m\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSize\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e27.4*13.2mm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eStyle\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eEmbedded Wireless Serial Data Transmission\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eType\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eRF module,Wireless Serial Port Module 1000m\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003ci\u003e\u003cspan style=\"color:rgba(159,5,0,255);font-size:24px;font-family:arial, helvetica, sans-serif\"\u003e\u003cstrong\u003eHC-12 V4.0 SI4438 Wireless Serial Communication Module Embedded Wireless Serial Data Transmission Module with Antenna Built-in MCU (433.4–483.8 MHz)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/i\u003e\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003e\u003cspan style='color:rgba(159,5,0,255);font-size:24px;font-family:\"times new roman\", times, serif'\u003e\u003cstrong\u003eProduct Description:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e1.  The HC-12 wireless serial communication module is a new-generation, multi-channel embedded wireless data transmission module. It operates in the 433.4–483.8 MHz frequency band and supports multiple channels, with a channel spacing of 400 kHz and a total of 127 channels. In default mode, the module has a maximum transmit power of 100mW (20dBm), an air data rate of 5000bps, a receive sensitivity of -116dBm, and a communication range of 1000 metres in open terrain.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e2.  The module utilises a surface-mount package with pin-through holes, allowing for surface-mount soldering. Measuring 27.4 mm × 13.2 mm (excluding the spring antenna), it is easily integrated into customer application systems. The module features a PCB antenna socket (ANT1), allowing users to connect an external antenna via a coaxial cable to the 433 MHz band (suitable for 433.4 MHz–450 MHz) or the 470 MHz band (suitable for 450 MHz–483.8 MHz), depending on the selected communication channel. The module also includes an antenna solder pad (ANT2) for convenient soldering of a spring antenna. Users may select one of these antenna options according to their requirements.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e3.  The module contains an MCU; users do not need to program the module separately. Various pass-through modes simply transmit and receive serial data, making it convenient to use. The module supports multiple serial pass-through modes, which users can select using AT commands according to their requirements.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e4.  The average operating current in idle mode for the four modes (FU1, FU2, FU3, FU4) is 3.3mA, 85μA, 16.5mA and 16.5mA respectively; the maximum operating current is approximately 120mA (during full-power transmission).\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='color:rgba(159,5,0,255);font-size:24px;font-family:\"times new roman\", times, serif'\u003e\u003cstrong\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='color:rgba(159,5,0,255);font-size:24px;font-family:\"times new roman\", times, serif'\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e1.  Long-range wireless transmission, with an air-to-air baud rate of 500 bps and a communication range of up to 1,000 metres in open terrain\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e2.  Operating frequency range of 433.4–483.8 MHz, with up to 254 communication channels\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e3.  Maximum transmission power of 100 mW (20 dBm) (with 8 power levels available)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e4.  Four operating modes to suit different application scenarios\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e5.  Built-in MCU, communicates with external devices via serial port\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='color:rgba(159,5,0,255);font-size:24px;font-family:\"times new roman\", times, serif'\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eModel: HC-12 SMD Version V4.0\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eCommunication interface: UART 3.3V–5V TTL level\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eCommunication voltage: 3.3V\/5V\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eOperating humidity: 10%–90%\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eRF chip solution: SI4438, with external 433MHz antenna\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eData rate: 4–5 KB\/s\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eCommunication range: 1 km (FU4), half-duplex, 1200–115,200 bps\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eOperating voltage: 3.0–5.5V\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eCommunication interface\/level: UART 3.3\/5V TTL level\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eOperating frequency band: 433.4–484.0MHz, 254 channels in total\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eTransmit power (MAX): 100mW (20dBm)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eIdle current in four modes: FU1: 3.3mA, FU2: 85μA, FU3: 16.5mA, FU4: 16.5mA,\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eOperating current (MAX): 100mA (full power)\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eOperating temperature: -40–+85°C\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eReference range: 1000m\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eModule dimensions: 27.4 × 13.2\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eBuilt-in firmware, auto-pairing on power-up; note that at least two modules are required for interconnection.\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan style='color:rgba(159,5,0,255);font-size:24px;font-family:\"times new roman\", times, serif'\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cspan style='color:rgba(159,5,0,255);font-size:24px;font-family:\"times new roman\", times, serif'\u003eProduct applications:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eWireless sensors\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eResidential and commercial building security\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eWireless control of robots\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eIndustrial remote control and telemetry\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eAutomated data acquisition\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eContainer information management\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003ePOS systems\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eWireless data collection for gas meters\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eKeyless entry systems for vehicles\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eWireless PC networking\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:24px;font-family:\"times new roman\", times, serif'\u003e\u003cstrong\u003eProduct list:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eHC-12 V4.0 SI4438 Embedded Wireless Serial Data Transmission Module × 1\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003eSpring Antenna × 1\u003c\/span\u003e\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S59fdee6d66d640f7bea4f79067bf18c4b.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sd54d2e95fb8c43ee954ae3a6abd99250D.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sb86a7afc2295479eb753a88cf42892b00.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S1566863ac0d2463c92744607f0d00ca7G.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S89322464ad34468c8e7680643620151b3.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sf56c12632eda4413a27d8c5885d1fd4ac.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S585384c730fc40e3a1c9b9b8beffb89fg.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sb61ce29876ea4be1acd47f91cd325695J.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S6fde9e2d9c784053b279504c37483e1dE.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S35655168cc1f4f1aa3da52b76bc9ae24T.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S1fd560de5aed42e2bf28dcb28cc105c5k.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Sbd2c408186b540fd915868767321cddeQ.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Safdbc19554a04ce0ac4bc2a85ea4a8b8P.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S9169bcbb089948cd9e58e8a8c59505649.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003cimg src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S96302191e5f9451499313333b7390ab1P.jpg\" slate-data-type=\"image\"\u003e\u003cspan style='font-size:20px;font-family:\"times new roman\", times, serif'\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"Yoeruyo","offers":[{"title":"HC-12 V4.0","offer_id":55377119019307,"sku":"14:10#HC-12 V4.0","price":17.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1000\/5744\/8747\/files\/Sdabb6d5ba32e4221884f812294a9856bo.webp?v=1788332822","url":"https:\/\/yoeruyo.com\/products\/hc-12-v4-0-si4438-wireless-module-1km-long-distance-433-4-483-8mh-wireless-serial-port-board-built-in-mcu-uart-interface-4-5kb-s","provider":"Yoeruyo","version":"1.0","type":"link"}