/** * Example code for using a microchip mrf24j40 module to send and receive * packets using plain 802.15.4 * Requirements: 3 pins for spi, 3 pins for reset, chip select and interrupt * notifications * This example file is considered to be in the public domain * Originally written by Karl Palsson, karlp@tweak.net.au, March 2011 */ #include #include const int pin_reset = 6; const int pin_cs = 7; // default CS pin on ATmega8/168/328 const int pin_interrupt = 2; // default interrupt pin on ATmega8/168/328 Mrf24j mrf(pin_reset, pin_cs, pin_interrupt); long last_time; long last_time2; long tx_interval = 1000; void setup() { Serial.begin(9600); mrf.reset(); mrf.init(); mrf.set_pan(0xcafe); // This is _our_ address mrf.address16_write(0x4201); // uncomment if you want to receive any packet on this channel //mrf.set_promiscuous(true); // uncomment if you want to enable PA/LNA external control //mrf.set_palna(true); // uncomment if you want to buffer all PHY Payload //mrf.set_bufferPHY(true); attachInterrupt(0, interrupt_routine, CHANGE); // interrupt 0 equivalent to pin 2(INT0) on ATmega8/168/328 last_time = millis(); interrupts(); } void interrupt_routine() { mrf.interrupt_handler(); // mrf24 object interrupt routine } void loop() { mrf.check_flags(&handle_rx, &handle_tx); unsigned long current_time = millis(); if (current_time - last_time > tx_interval) { last_time = current_time; Serial.println("txxxing..."); mrf.send16(0x4202, "abcd"); } } void handle_rx() { Serial.print("received a packet ");Serial.print(mrf.get_rxinfo()->frame_length, DEC);Serial.println(" bytes long"); if(mrf.get_bufferPHY()){ Serial.println("Packet data (PHY Payload):"); for (int i = 0; i < mrf.get_rxinfo()->frame_length; i++) { Serial.print(mrf.get_rxbuf()[i]); } } Serial.println("\r\nASCII data (relevant data):"); for (int i = 0; i < mrf.rx_datalength(); i++) { Serial.write(mrf.get_rxinfo()->rx_data[i]); } Serial.print("\r\nLQI/RSSI="); Serial.print(mrf.get_rxinfo()->lqi, DEC); Serial.print("/"); Serial.println(mrf.get_rxinfo()->rssi, DEC); } void handle_tx() { if (mrf.get_txinfo()->tx_ok) { Serial.println("TX went ok, got ack"); } else { Serial.print("TX failed after ");Serial.print(mrf.get_txinfo()->retries);Serial.println(" retries\n"); } }