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Lazarewicz Julien
161
examples/raspi/rf95/rf95_client/rf95_client1.cpp
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161
examples/raspi/rf95/rf95_client/rf95_client1.cpp
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// rf95_client.cpp
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// -*- mode: C++ -*-
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// Example app showing how to create a simple messaging client
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// with the RH_RF95 class. RH_RF95 class does not provide for addressing or
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// reliability, so you should only use RH_RF95 if you do not need the higher
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// level messaging abilities.
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// It is designed to work with the other example rf95_server.
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//
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// Requires Pigpio GPIO library. Install by downloading and compiling from
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// http://abyz.me.uk/rpi/pigpio/, or install via command line with
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// "sudo apt install pigpio". To use, run "make" at the command line in
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// the folder where this source code resides. Then execute application with
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// sudo ./rf95_client.
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// Tested on Raspberry Pi Zero and Zero W with LoRaWan/TTN RPI Zero Shield
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// by ElectronicTricks. Although this application builds and executes on
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// Raspberry Pi 3, there seems to be missed messages and hangs.
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// Strategically adding delays does seem to help in some cases.
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//(9/20/2019) Contributed by Brody M. Based off rf22_client.pde.
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// Raspberry Pi mods influenced by nrf24 example by Mike Poublon,
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// and Charles-Henri Hallard (https://github.com/hallard/RadioHead)
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#include <pigpio.h>
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#include <stdio.h>
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#include <signal.h>
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#include <unistd.h>
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#include <RH_RF95.h>
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//Function Definitions
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void sig_handler(int sig);
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//Pin Definitions
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#ifdef DRAGINO_GPS_HAT
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// Pin definitions for lora dragino gps hat
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#define RFM95_CS_PIN 25 // Slave Select on GPIO25 so P1 connector pin #22
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#define RFM95_IRQ_PIN 4 // IRQ on GPIO4 so P1 connector pin #7
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#define RFM95_RESET_PIN 17 // Reset on GPIO17 so P1 connector pin #11
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#undef RFM95_LED // Dragino Board as no LED to drive
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#else
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//Pin definitions for other board
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#define RFM95_CS_PIN 8
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#define RFM95_IRQ_PIN 25
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#define RFM95_LED 4
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#endif
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//Client and Server Addresses
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#define CLIENT_ADDRESS 1
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#define SERVER_ADDRESS 2
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//RFM95 Configuration
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#ifdef EUROPE
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#define RFM95_FREQUENCY 868.00
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#else
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#define RFM95_FREQUENCY 915.00
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#endif
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#define RFM95_TXPOWER 14
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// Singleton instance of the radio driver
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RH_RF95 rf95(RFM95_CS_PIN, RFM95_IRQ_PIN);
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//Flag for Ctrl-C
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int flag = 0;
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//Main Function
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int main (int argc, const char* argv[] )
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{
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if (gpioInitialise()<0)
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{
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printf( "\n\nRPI rf95_client startup Failed.\n" );
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return 1;
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}
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gpioSetSignalFunc(2, sig_handler); //2 is SIGINT. Ctrl+C will cause signal.
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printf( "\nRPI rf95_client startup OK.\n" );
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printf( "\nRPI GPIO settings:\n" );
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printf("CS-> GPIO %d\n", (uint8_t) RFM95_CS_PIN);
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printf("IRQ-> GPIO %d\n", (uint8_t) RFM95_IRQ_PIN);
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#ifdef RFM95_LED
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gpioSetMode(RFM95_LED, PI_OUTPUT);
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printf("\nINFO: LED on GPIO %d\n", (uint8_t) RFM95_LED);
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gpioWrite(RFM95_LED, PI_ON);
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gpioDelay(500000);
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gpioWrite(RFM95_LED, PI_OFF);
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#endif
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if (!rf95.init())
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{
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printf( "\n\nRF95 driver failed to initialize.\n\n" );
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return 1;
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}
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/* Begin Manager/Driver settings code */
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printf("\nRFM 95 Settings:\n");
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printf("Frequency= %d MHz\n", (uint16_t) RFM95_FREQUENCY);
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printf("Power= %d\n", (uint8_t) RFM95_TXPOWER);
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printf("Client(This) Address= %d\n", CLIENT_ADDRESS);
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printf("Server Address= %d\n", SERVER_ADDRESS);
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rf95.setTxPower(RFM95_TXPOWER, false);
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rf95.setFrequency(RFM95_FREQUENCY);
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rf95.setThisAddress(CLIENT_ADDRESS);
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rf95.setHeaderFrom(CLIENT_ADDRESS);
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rf95.setHeaderTo(SERVER_ADDRESS);
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rf95.setModemConfig(RH_RF95::Bw125Cr48Sf4096);
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/* End Manager/Driver settings code */
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/* Begin Datagram Client Code */
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while(!flag)
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{
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Serial.println("Sending to rf95_server");
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// Send a message to rf95_server
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#ifdef RFM95_LED
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gpioWrite(RFM95_LED, PI_ON);
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#endif
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uint8_t data[] = "Hello World!";
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rf95.send(data, sizeof(data));
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rf95.waitPacketSent();
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#ifdef RFM95_LED
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gpioWrite(RFM95_LED, PI_OFF);
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#endif
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// Now wait for a reply
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uint8_t buf[RH_RF95_MAX_MESSAGE_LEN];
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uint8_t len = sizeof(buf);
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if (rf95.waitAvailableTimeout(3000))
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{
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// Should be a reply message for us now
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if (rf95.recv(buf, &len))
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{
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#ifdef RFM95_LED
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gpioWrite(RFM95_LED, PI_ON);
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#endif
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Serial.print("got reply: ");
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Serial.println((char*)buf);
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#ifdef RFM95_LED
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gpioWrite(RFM95_LED, PI_OFF);
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#endif
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}
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else
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{
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Serial.println("recv failed");
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}
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}
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else
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{
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Serial.println("No reply, is rf95_server running?");
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}
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gpioDelay(400000);
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}
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printf( "\nrf95_client Tester Ending\n" );
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gpioTerminate();
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return 0;
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}
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void sig_handler(int sig)
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{
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flag=1;
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}
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