Description

Radio module HC-12 44382A 433MHz – 1000m

Wireless module, operates at 433 MHz within a range of up to 1000 meters. It is powered by a voltage of 3.2V to 5.5V.

• The modules receive and send two-way UART TX, RX communication making it very easy to send and receive data. Here you do not need to collect packets of data, encode and send as is the case with other communication modules, just enter the data and send, the module itself will make a „packet” will encode and send, the same is true for reading data.

By connecting the module under Arduino using a simple UART interface, the module becomes easy to use. This small module has high-speed data transmission of up to 236,000 bps.

With this module, it is possible to transmit information from one Arduino to another over considerable distances, which will be useful in, for example, the design of an inspection vehicle or other projects.

Product features

• The module has a „SET” function through which you can, among other things:
• change the transmit/receive speed
• alter transmit power
• change the broadcast channel
• change the frequency
• enable the „SLEEP” function, the so-called „sleep” in which the module consumes 22μA

We used this module to build the project – long distance temperature controller with alarm.

A sample piece of code for sending and receiving:

Transmitter:

#include SoftwareSerial mySerial(2, 3); // RX=2, TX=3 to HC-12 void setup() { Serial.begin(9600); mySerial.begin(1200); } void loop() { mySerial.println(„Shop ABC-RC :)”); delay(1000); }

Receiver:

#include SoftwareSerial mySerial(2, 3); // RX, TX to hc12 void setup() { Serial.begin(9600); // ardu – comp mySerial.begin(1200); // ardu – HC-12 } void loop() { if (mySerial.available()) { Serial.write(mySerial.read()); } }

Technical data

• Supply voltage: from 3.3 V to 5.5 V
• Current consumption at rest: 3.4 mA
• Controller: CC1101
• Operating frequency range: from 433.4 MHz to 473 MHz
• Output power: 10 dB
• Pin to be soldered antenna included
• Connector u.FL for connecting an external antenna
• Transmission range: from 1 m to 1000 m (below 1 meter, may not work properly)
• Pinouts: holes for goldpin connectors 2.54 mm raster (not included to be purchased separately)
• Module dimensions: 27.8 x 14.4 x 4 mm
• Connection:
• SET – Pin for changing module settings, by default pulled up to VCC via 10 kΩ resistor.
• TXD – Serial communication – transmitting.
• RXD – Serial communication – receiving.
• GND – Ground of the circuit.
• VCC – Supply voltage from 3.2 V to 5.5 V.

Useful links + video

• how to send data using the module
• video of AT command changes
• Technical data – datasheet

Included

• Radio module HC-12 44382A433MHz – 1000m – 1 pc
• Antenna – 1 pc