Evalm

Geekcreit 5Pcs HC-12 433MHz Wireless Serial Transceiver Module - SI4438, 1000M Range

Name: Geekcreit 5Pcs HC-12 433MHz Wireless Serial Transceiver Module - SI4438, 1000M Range
Brand: Evalm
SKU: 7841898678253
Price: 31.99 USD
Availability: InStock

$31.99 USD

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HC-12 Wireless Module Description

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"