Aideepen | 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

HC-12 V4.0 SI4438 Wireless Serial Communication Module Embedded Wireless Serial Data Transmission Module with Antenna Built-in MCU (433.4–483.8 MHz)Product Description:1. 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.2. 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.3. 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.4. 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).Features:1. 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 terrain2. Operating frequency range of 433.4–483.8 MHz, with up to 254 communication channels3. Maximum transmission power of 100 mW (20 dBm) (with 8 power levels available)4. Four operating modes to suit different application scenarios5. Built-in MCU, communicates with external devices via serial portSpecifications:Model: HC-12 SMD Version V4.0Communication interface: UART 3.3V–5V TTL levelCommunication voltage: 3.3V/5VOperating humidity: 10%–90%RF chip solution: SI4438, with external 433MHz antennaData rate: 4–5 KB/sCommunication range: 1 km (FU4), half-duplex, 1200–115,200 bpsOperating voltage: 3.0–5.5VCommunication interface/level: UART 3.3/5V TTL levelOperating frequency band: 433.4–484.0MHz, 254 channels in totalTransmit power (MAX): 100mW (20dBm)Idle current in four modes: FU1: 3.3mA, FU2: 85μA, FU3: 16.5mA, FU4: 16.5mA,Operating current (MAX): 100mA (full power)Operating temperature: -40–+85°CReference range: 1000mModule dimensions: 27.4 × 13.2Built-in firmware, auto-pairing on power-up; note that at least two modules are required for interconnection.Product applications:Wireless sensorsResidential and commercial building securityWireless control of robotsIndustrial remote control and telemetryAutomated data acquisitionContainer information managementPOS systemsWireless data collection for gas metersKeyless entry systems for vehiclesWireless PC networkingProduct list:HC-12 V4.0 SI4438 Embedded Wireless Serial Data Transmission Module × 1Spring Antenna × 1