SPECIFICATIONS

Features:
1. Long distance wireless transmission, with an airborne baud rate of 500bps, supporting a communication distance of 1000 meters in open areas
2. Operating frequency range of 433.4-483.8MHz, with up to 254 communication channels
3. Maximum 100mW (20dBm) transmission power (can be set to 8 levels of power)
4. Four working modes to adapt to different application scenarios
5. Built in MCU, communicates with external devices through serial port

Product Introduction
The HC-12 wireless serial communication module is a new generation multi-channel embedded wireless data transmission module. The wireless operating frequency band is 433.4-483.8MHz, and multiple channels can be set with a step frequency of 400KHz, for a total of 127 channels. In default mode, the module is
High transmission power of 100mW (20dBm), 5000bps airborne baud rate, receiving sensitivity of -116dBm, open area 1000
The communication distance of meters.
The module adopts stamp hole packaging method and can be surface mounted and soldered. The module size is 27.4mm × 13.2mm (excluding spring antenna), which is very convenient for customers to embed into the application system. There is a PCB antenna base ANT1 on the module, and users can use coaxial lines to connect external antennas in the 433MHz frequency band (suitable for 433.4MHz-450MHz) or 470MHz frequency band (suitable for 450MHz-483.8MHz) according to the selected communication channel; There are also antenna welding holes ANT2 inside the module,
Convenient for users to weld spring antennas. Users can choose one of the antennas according to their usage requirements.
The module contains an MCU inside, and users do not need to program the module separately. Various transparent transmission modes only need to send and receive serial data, making it easy to use. The module adopts multiple serial port transparent transmission modes, and users can choose according to their usage requirements using AT commands.
The average operating currents of the four modes FU1, FU2, FU3, and FU4 in idle state are 3.3mA, 85 μ A, and 16.5mA, respectively
And 16.5mA, with a maximum operating current of about 120mA (in full power transmission state).

Parameters:
Model: HC-12 Surface mount V4.0
Communication interface: UART 3.3V~5V TTL level
Communication level: 3.3V/5V level
Working humidity 10%~90%
RF chip solution: SI4438, external 433MHz antenna
Transmission rate 4-5KB/s
Communication distance: 1km/FU4, half duplex, 1200~115200bp
Working voltage 3.0~5.5V
Communication interface/level: UART 3.3/5V TTL level
Working frequency range of 433.4~484.0MHz, with a total of 254 channels
Transmission power (MAX): 100mW (20dBm)
Four idle current modes: FU1:3.3mA, FU2:85 μ A, FU3:16.5mA, FU4:16.5mA,
Working current (MAX): 100mA (full power)
Working temperature: -40~+85 ℃
Reference distance: 1000m
Module size: 27.4 × 13.2
Built in firmware, power on self connection, note that at least 2 modules are required for interconnection.
Product application:
wireless sensor
Residential building security
Robot wireless control
Industrial remote control and telemetry
Automated data collection
Container Information Management
POS system
Wireless collection of gas meter data
Vehicle Keyless Entry System
PC wireless networking

Product List:
1X module
1X spring antenna