SPECIFICATIONS

Brand Name: DIY NOW

Choice: yes

Communication Distance: 1 km (Mode FU4); Half-duplex; 1200-115200 bps

Communication Interface: UART (3.3V-5V TTL Level)

Communication Interface/Level: UART (3.3V/5V TTL Level)

Communication Voltage Level: 3.3V / 5V

Condition: New

Data Transmission Module: Wireless Serial Communication Module

High-concerned chemical: none

Model: HC-12 (SMD Version V4.0)

Operating Current (Max): 100 mA (at full power)

Operating Frequency Band: 433.4-484.0 MHz (254 channels total)

Operating Humidity: 10%-90%

Operating Temperature: -40 to +85℃

Operating Voltage: 3.0-5.5V

Origin: Mainland China

Package: SOP

Quantity: 1

RF Chip Solution: Si4438; supports external 433MHz antenna

Reference Distance: 1000 m

Supply Voltage: 3.0-5.5V

Transmission Rate: 4-5 KB/s

Transmit Power (Max): 100 mW (20 dBm)

Type: Module

is_customized: Yes

semi_Choice: yes

Product Features:
1. Long-range wireless transmission: Features an air baud rate of 500bps and supports a communication distance of up to 1000 meters in open environments.
2. Operating frequency range: 433.4–483.8 MHz, offering up to 254 communication channels.
3. Maximum transmit power: 100 mW (20 dBm), with 8 adjustable power levels.
4. Four operating modes: Adaptable to various application scenarios.
5. Built-in MCU: Communicates with external devices via a serial port.
Product Applications: Wireless sensors, residential and building security systems, wireless robot control, industrial remote control, telemetry, automated data acquisition, container information management, POS systems, wireless gas meter data collection, vehicle keyless entry systems, and PC wireless networking.

The module utilizes a stamp-hole package design, allowing for surface-mount soldering. With dimensions of 27.4 mm × 13.2 mm (excluding the spring antenna), it is highly convenient for customers to embed directly into their application systems. The module features an onboard PCB antenna connector (ANT1), enabling users to connect an external antenna via a coaxial cable. Depending on the selected communication channel, users can utilize either the 433 MHz band (suitable for 433.4–450 MHz) or the 470 MHz band (suitable for 450–483.8 MHz). Additionally, the module includes a dedicated soldering hole for a spring antenna (ANT2), providing a convenient option for users who prefer this antenna type. Users may select the antenna best suited to their specific application requirements.
The module contains an internal MCU, eliminating the need for users to perform additional programming on the module itself; in its various transparent transmission modes, users simply need to handle the sending and receiving of serial data, ensuring ease of use. The module supports multiple serial transparent transmission modes, which users can select and configure using AT commands based on their operational needs.
In their idle states, the average operating currents for the four modes—FU1, FU2, FU3, and FU4—are approximately 3.3 mA, 85 µA, 16.5 mA, and 16.5 mA, respectively. The maximum operating current is approximately 120 mA (occurring during full-power transmission). Product Specifications:
Model: HC-12 (SMD Version V4.0)
Communication Interface: UART (3.3V–5V TTL Level)
Communication Voltage Level: 3.3V / 5V
Operating Humidity: 10% – 90%
RF Chip Solution: Si4438 (External 433MHz antenna required)
Transmission Rate: 4 – 5 KB/s
Communication Distance: 1 km (in FU4 mode); Half-duplex; 1200 – 115200 bps
Operating Voltage: 3.0 – 5.5V
Communication Interface/Level: UART (3.3V / 5V TTL Level)
Operating Frequency Band: 433.4 – 484.0 MHz (Total of 254 channels)
Transmit Power (Max): 100 mW (20 dBm)
Idle Current (Across 4 Modes): FU1: 3.3 mA; FU2: 85 μA; FU3: 16.5 mA; FU4: 16.5 mA
Operating Current (Max): 100 mA (at full power)
Operating Temperature: -40°C to +85°C
Reference Distance: 1000 m
Module Dimensions: 27.4 × 13.2 mm
Features built-in firmware and automatic connection upon power-up. Note: A minimum of two modules is required to establish an interconnection.

Product List:
1 × Module
1 × Spring Antenna