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A digital 1 turns the carrier on while a digital 0 turns tit off.
Sample Code
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#include <RCSwitch.h> RCSwitch mySwitch = RCSwitch(); // ask_transmitter.pde // -*- mode: C++ -*- // Simple example of how to use RadioHead to transmit messages // with a simple ASK transmitter in a very simple way. // Implements a simplex (one-way) transmitter with an TX-C1 module #include <RH_ASK.h> #include <SPI.h> // Not actually used but needed to compile //RH_ASK (uint16_t speed=2000, uint8_t rxPin=11, uint8_t txPin=12, uint8_t pttPin=10, bool pttInverted=false) RH_ASK driver(2000, D2, D1, D6); // ESP8266 or ESP32: do not use pin 11 or 2 //Connect data to pin 5/D1 void setup() { Serial.begin(115200); Serial.println("\n\nRFnrfSender SnifferStarted\n\n"); if (!driver.init()){ mySwitch.enableReceive(0); // Receiver input on interrupt 0 (GPIO 0) pinMode(LED_BUILTIN, OUTPUT); Serial.println("init failed"); } //driver.setModeTx(); Serial.println("Initialized"); } void loop() { Serial.println("Sending hello"); const char *msg = "hello"; if (mySwitch.available()) {driver.send((uint8_t *)msg, strlen(msg)); Serialdriver.print("Received "); Serial.print( mySwitch.getReceivedValue() ); Serial.print("waitPacketSent(); delay(1000); } |
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// ask_receiver.pde // -*- mode: C++ -*- // Simple example of how to use RadioHead to receive messages // with a simple ASK transmitter in a very simple way. // Implements a simplex (one-way) receiver with an Rx-B1 module #include <RH_ASK.h> #include <SPI.h> // Not actually used but needed to compile //RH_ASK (uint16_t speed=2000, uint8_t rxPin=11, uint8_t txPin=12, uint8_t pttPin=10, bool pttInverted=false) RH_ASK driver(2000, D1, D2, D6); // ESP8266 or ESP32: do not use pin 11 or 2 //Connect data to pin 5/D1 void setup() { / "); Serial.printbegin( mySwitch.getReceivedBitlength() );115200); Serial.printprintln("Bit \n\nrfReceiver Started\n\n"); if (!driver.init()){ Serial.printprintln("init // failed"); } Serial.printprintln("Protocol: Initialized"); Serial.println( mySwitch.getReceivedProtocol() ); digitalWrite(LED_BUILTIN, HIGH); // Toggle the onboard LED delay(1 } void loop() { uint8_t buf[RH_ASK_MAX_MESSAGE_LEN]; uint8_t buflen = sizeof(buf); if (driver.recv(buf, &buflen)) // Non-blocking { // Message with a good checksum received, dump it. // driver.printBuffer("Got:", buf, buflen); digitalWrite(LED_BUILTIN, LOW Serial.print("Message Received: "); mySwitch.resetAvailable(); Serial.println((char*)buf); } } |
Reference
| Reference | URL |
|---|---|
| Spec Sheet | http://www.mantech.co.za/Datasheets/Products/433Mhz_RF-TX&RX.pdf |
| How 433MHz RF Tx-Rx Modules Work & Interface with Arduino | https://lastminuteengineers.com/433mhz-rf-wireless-arduino-tutorial/ |
| Complete Guide for RF 433MHz Transmitter/Receiver Module With Arduino | https://randomnerdtutorials.com/rf-433mhz-transmitter-receiver-module-with-arduino/ |
| Using Inexpensive 433 MHz RF Modules with Arduino | https://www.youtube.com/watch?v=b5C9SPVlU4U |
| Radio Head Library | http://www.airspayce.com/mikem/arduino/RadioHead/ |
| RF Sniffer | https://www.electroschematics.com/13682/433mhz-rf-sniffer/ |
| RC Switch Library | https://github.com/sui77/rc-switch |
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