HC-12 Wireless Module Description .features, .at-commands, .tech-specs { margin-bottom: 20px; } ul { list-style: none; padding: 0; } HC-12 Wireless Module Precise Details: Update Information: The chip has been upgraded from SI4463 to SI4438 (Shipped from 11.26.2019). Note: The HC-11 cannot communicate with the HC-12. They operate independently and should be used in pairs. Features: Supply Voltage: 3.2V - 5.5V. For prolonged use in emission state when supply voltage exceeds 4.5V, use a 1N4007 diode to prevent module's built-in LDO from heating. Default Address Range: Approx. 600m (adjustable to 1000m at 500bps baud rate). Default Idle Current: 16mA (varies in different modes). Module Dimensions: 27.8 x 14.4 x 4mm. Operating Frequency Range: 433.4 - 473.0 MHz, supporting up to 100 communication channels. Maximum Transmit Power: 100mW (adjustable). Software Upgrade Supported. Default Settings: Mode FU3, baud rate 9600bps, communication channels CH001 (433.4MHz). Four Transparent Transmission Modes available for varied applications. Built-in MCU: No programming needed. Communicate through serial port. No byte limit per transmission in FU1 / FU3 mode. Supports one-to-one, one-to-many, many-to-one, and many-to-many transparent transmissions. Technical Specifications: Model: HC-12 Module Size: 27.4 x 13.2 x 4mm Frequency Range: 433.4 ~ 473.0MHz Communication Interface: UART 3.3V / 5V TTL level Operating Voltage: 3.2 - 5.5V Idle Current: 16mA Antenna Interface: Spring antenna / antenna socket Operating Temperature: -25°C ~ +75°C Storage Temperature: -40°C ~ +85°C Transmit Power: 20dBm (MAX) Reference Distance: 1000m AT Commands Set: The AT command set allows you to configure module parameters. The settings are retained after power down. Enter Command Mode: Normal use: Set 5th pin "SET" low. Power mode: Set 5th pin "SET" low, then power on. Commands: AT: Check module status. Response: "OK" AT+Bxxxx: Change baud rate. Response: "OK+Bxxxx" AT+Cxxx: Change communication channel. Response: "OK+Cxxx" AT+FUx: Change serial pass-through mode. Response: "OK+FUx" AT+Px: Set transmit power. Response: "OK+Px" AT+Ry: Get specific parameter. Response: "OK + (parameter)" AT+RX: Get all parameters. Response: "OK + various parameters" AT+V: Query firmware version. Response: "www.hc01.com HC-12_V2.6" AT+SLEEP: Enter sleep mode. Response: "OK+SLEEP" AT+DEFAULT: Reset module. Response: "OK+SLEEP" Package Includes: 5 x HC-12 Module
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