Communication

CC1101 RF Module

The CC1101 RF Module is a low-power sub-1 GHz RF transceiver module used for wireless data communication. It is typically controlled by a microcontroller over SPI (SCK, MISO, MOSI, CSN) and can use GDO0/GDO2 as digital interrupt/status lines.

Width: 38.1 mm

Pinout — CC1101 RF Module

Pin	Signal	Description
`CSN`	chip-select	Active-low SPI chip select for the CC1101 transceiver.
`GND`	ground	Ground reference for the CC1101 module and SPI interface.
`VCC`	power	3.3 V supply input for the CC1101 RF transceiver module.
`GDO0`	interrupt	Programmable CC1101 digital output, often used as packet/IRQ signal.
`SCK`	SCK	SPI clock input from the host microcontroller.
`MISO`	MISO	SPI data output from the CC1101 to the host controller.
`MOSI`	MOSI	SPI data input to the CC1101 from the host controller.
`GDO2`	digital	Programmable CC1101 digital output for status, sync, or interrupt functions.

Example wiring diagram — CC1101 RF Module

From	To	Wire
`board:5V`	`x1:VCC`	red
`board:GND`	`x1:GND`	black
`board:D10`	`x1:CSN`	green
`board:D2`	`x1:GDO0`	blue
`board:D13`	`x1:SCK`	yellow
`board:D12`	`x1:MISO`	purple
`board:D11`	`x1:MOSI`	cyan

Example Arduino code — CC1101 RF Module

This example was written and compile-checked for the arduino-uno. Codey Online adapts it to any other supported board for you.

#include <SPI.h>
#include <ELECHOUSE_CC1101_SRC_DRV.h>

const byte PIN_CC1101_CS = 10;
const byte PIN_CC1101_GDO0 = 2;

void setup() {
  Serial.begin(9600);
  while (!Serial) {
    ;
  }

  pinMode(PIN_CC1101_GDO0, INPUT);

  // Configure the library to use the Uno's hardware SPI pins and our CS pin.
  ELECHOUSE_cc1101.setSpiPin(PIN_CC1101_CS, MISO, MOSI, SCK);
  ELECHOUSE_cc1101.setGDO0(PIN_CC1101_GDO0);
  ELECHOUSE_cc1101.setCCMode(1);       // Packet mode
  ELECHOUSE_cc1101.setModulation(2);   // ASK/OOK mapping in this library
  ELECHOUSE_cc1101.setMHZ(433.92);     // Common sub-GHz ISM frequency
  ELECHOUSE_cc1101.setPA(10);          // Moderate output power

  ELECHOUSE_cc1101.Init();

  Serial.println("CC1101 initialized. Listening for packets on 433.92 MHz...");
}

void loop() {
  if (ELECHOUSE_cc1101.CheckRxFifo(10)) {
    byte buffer[64];
    byte len = ELECHOUSE_cc1101.ReceiveData(buffer);

    Serial.print("Received ");
    Serial.print(len);
    Serial.print(" byte(s): ");
    for (byte i = 0; i < len; i++) {
      if (buffer[i] < 16) Serial.print('0');
      Serial.print(buffer[i], HEX);
      Serial.print(' ');
    }
    Serial.println();
  }
}

CC1101 RF Module

Pinout — CC1101 RF Module

Example wiring diagram — CC1101 RF Module

Example Arduino code — CC1101 RF Module

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