Initial commit of Arduino libraries

RadioLib/examples/nRF24/nRF24_Receive_Interrupt/nRF24_Receive_Interrupt.ino

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+/*
+  RadioLib nRF24 Receive Example
+
+  This example listens for FSK transmissions using nRF24 2.4 GHz radio module.
+  Once a packet is received, an interrupt is triggered.
+  To successfully receive data, the following settings have to be the same
+  on both transmitter and receiver:
+  - carrier frequency
+  - data rate
+  - transmit pipe on transmitter must match receive pipe
+    on receiver
+
+  For default module settings, see the wiki page
+  https://github.com/jgromes/RadioLib/wiki/Default-configuration#nrf24
+
+  For full API reference, see the GitHub Pages
+  https://jgromes.github.io/RadioLib/
+*/
+
+// include the library
+#include <RadioLib.h>
+
+// nRF24 has the following connections:
+// CS pin:    10
+// IRQ pin:   2
+// CE pin:    3
+nRF24 radio = new Module(10, 2, 3);
+
+// or detect the pinout automatically using RadioBoards
+// https://github.com/radiolib-org/RadioBoards
+/*
+#define RADIO_BOARD_AUTO
+#include <RadioBoards.h>
+Radio radio = new RadioModule();
+*/
+
+// flag to indicate that a packet was received
+volatile bool receivedFlag = false;
+
+// this function is called when a complete packet
+// is received by the module
+// IMPORTANT: this function MUST be 'void' type
+//            and MUST NOT have any arguments!
+#if defined(ESP8266) || defined(ESP32)
+  ICACHE_RAM_ATTR
+#endif
+void setFlag(void) {
+  // we got a packet, set the flag
+  receivedFlag = true;
+}
+
+void setup() {
+  Serial.begin(9600);
+
+  // initialize nRF24 with default settings
+  Serial.print(F("[nRF24] Initializing ... "));
+  int state = radio.begin();
+  if(state == RADIOLIB_ERR_NONE) {
+    Serial.println(F("success!"));
+  } else {
+    Serial.print(F("failed, code "));
+    Serial.println(state);
+    while (true) { delay(10); }
+  }
+
+  // set receive pipe 0 address
+  // NOTE: address width in bytes MUST be equal to the
+  //       width set in begin() or setAddressWidth()
+  //       methods (5 by default)
+  Serial.print(F("[nRF24] Setting address for receive pipe 0 ... "));
+  byte addr[] = {0x01, 0x23, 0x45, 0x67, 0x89};
+  state = radio.setReceivePipe(0, addr);
+  if(state == RADIOLIB_ERR_NONE) {
+    Serial.println(F("success!"));
+  } else {
+    Serial.print(F("failed, code "));
+    Serial.println(state);
+    while (true) { delay(10); }
+  }
+
+  // set the function that will be called
+  // when new packet is received
+  radio.setPacketReceivedAction(setFlag);
+
+  // start listening
+  Serial.print(F("[nRF24] Starting to listen ... "));
+  state = radio.startReceive();
+  if (state == RADIOLIB_ERR_NONE) {
+    Serial.println(F("success!"));
+  } else {
+    Serial.print(F("failed, code "));
+    Serial.println(state);
+    while (true) { delay(10); }
+  }
+
+  // if needed, 'listen' mode can be disabled by calling
+  // any of the following methods:
+  //
+  // radio.standby()
+  // radio.sleep()
+  // radio.transmit();
+  // radio.receive();
+  // radio.readData();
+}
+
+void loop() {
+  // check if the flag is set
+  if(receivedFlag) {
+    // reset flag
+    receivedFlag = false;
+
+    // you can read received data as an Arduino String
+    String str;
+    int state = radio.readData(str);
+
+    // you can also read received data as byte array
+    /*
+      byte byteArr[8];
+      int numBytes = radio.getPacketLength();
+      int state = radio.readData(byteArr, numBytes);
+    */
+
+    if (state == RADIOLIB_ERR_NONE) {
+      // packet was successfully received
+      Serial.println(F("[nRF24] Received packet!"));
+
+      // print data of the packet
+      Serial.print(F("[nRF24] Data:\t\t"));
+      Serial.println(str);
+
+    } else {
+      // some other error occurred
+      Serial.print(F("[nRF24] Failed, code "));
+      Serial.println(state);
+
+    }
+
+    // put module back to listen mode
+    radio.startReceive();
+  }
+}