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This commit is contained in:
Lazarewicz Julien
195
examples/raspi/rf95/rf95_server/rf95_server2.cpp
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195
examples/raspi/rf95/rf95_server/rf95_server2.cpp
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// rf95_server.cpp
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// -*- mode: C++ -*-
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// Example app showing how to create a simple messageing server
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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_client.
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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_server.
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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_server.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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#include <help_functions.h>
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//Function Definitions
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void sig_handler(int sig);
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#ifdef DRAGINO_GPS_HAT
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pthread_mutex_t gps_data_mutex;
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#include <gpsMT3339.h>
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// Pin definitions for 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
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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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#ifdef DRAGINO_GPS_HAT
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gps_MT3339 gps(GPS_DEVICE, &gps_data_mutex);
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#endif
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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_server 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_server 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("LED-> 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 Address= %d\n", CLIENT_ADDRESS);
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printf("Server(This) 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(SERVER_ADDRESS);
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rf95.setModemConfig(RH_RF95::Bw125Cr48Sf4096);
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/* End Manager/Driver settings code */
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rf95.printRegisters();
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/* Begin Datagram Server Code */
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// start gps of dragino gps hat
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#ifdef DRAGINO_GPS_HAT
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pthread_t read_gps_thread;
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int iret;
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pthread_mutex_init(&gps_data_mutex,NULL);
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iret = pthread_create( &read_gps_thread, NULL, ((void* (*)(void*))&gps_MT3339::read_gps), &gps);
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if (iret != 0)
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printf("\nCould not start thread to read gps data\n");
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#endif
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print_scheduler();
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/* Begin Datagram Server Code */
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while(!flag)
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{
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if (rf95.available())
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{
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// Should be a message for us now
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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.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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// RF95::printBuffer("request: ", buf, len);
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printf("got request: \"%s\"\n", (char*)buf);
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printf("RSSI: %d\n",rf95.lastRssi());
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uint8_t data[50] = "And hello back to you";
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//cut out sequence number from received message (format: "(...)") if in message
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// and copy to outgoing message
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char* temp1 = strchr((char*)buf,'(');
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char* temp2 = strchr((char*)buf,')');
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if ((temp1 != NULL) && (temp2 != NULL))
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{
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// if received message contains sequence number,
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// reply with received sequence number
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temp1++;
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uint8_t wordlen = temp2 - temp1;
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temp1[wordlen] = 0x00;
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#ifndef DRAGINO_GPS_HAT
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snprintf((char*)data+21,8,"(%5s)",temp1);
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#else
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// In Case of Dragino Lora/GPS hat add timestamp and gps position of server to reply
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pthread_mutex_lock(&gps_data_mutex);
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snprintf((char*)data,47,"R:(%5s):%10s,%10s,%11s",
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temp1,gps.getTimestamp(),gps.getLatitude(),gps.getLongitude());
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pthread_mutex_unlock(&gps_data_mutex);
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#endif
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}
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//Send a reply including a trailing 0x00
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rf95.send(data, strlen((char*)data)+1);
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rf95.waitPacketSent();
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printf("Sent a reply: \"%s\"\n",data);
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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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}
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/* End Datagram Server Code */
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printf( "\nrf95_server 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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