Fabio Gatti
/
poc_lorawan
poc lorawan using disco_l475vg and sx1272mb2xas
main.cpp
- Committer:
- fabio_gatti
- Date:
- 2019-03-14
- Revision:
- 49:bf339fabb590
- Parent:
- 47:b6d132f1079f
File content as of revision 49:bf339fabb590:
/** * Copyright (c) 2017, Arm Limited and affiliates. * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <stdio.h> #include "lorawan/LoRaWANInterface.h" #include "lorawan/system/lorawan_data_structures.h" #include "events/EventQueue.h" // Application helpers #include "DummySensor.h" #include "trace_helper.h" #include "lora_radio_helper.h" using namespace events; // Max payload size can be LORAMAC_PHY_MAXPAYLOAD. // This example only communicates with much shorter messages (<30 bytes). // If longer messages are used, these buffers must be changed accordingly. uint8_t tx_buffer[30]; uint8_t rx_buffer[30]; /* * Sets up an application dependent transmission timer in ms. Used only when Duty Cycling is off for testing */ #define TX_TIMER 10000 /** * Maximum number of events for the event queue. * 10 is the safe number for the stack events, however, if application * also uses the queue for whatever purposes, this number should be increased. */ #define MAX_NUMBER_OF_EVENTS 10 // Maximum number of retries for CONFIRMED messages before giving up #define LORAWAN_CONFIRMED_MSG_RETRY_COUNTER 3 //DR_5=SF_7; DR_4=SF_8; DR_3=SF_9; DR_2=SF_10; DR_1=SF_11; DR_0=SF_12 #define LORAWAN_DATA_RATE DR_5 // app port #define LORAWAN_APP_PORT 15 // tx message type #define LORAWAN_TX_MSG_TYPE MSG_UNCONFIRMED_FLAG // number of channel #define LORAWAN_CHANNEL_NBR 3 // timeout retry when channel is block in msec #define LORAWAN_CHANNEL_RETRY 3000 /** * Dummy pin for dummy sensor */ #define PC_9 0 /** * Dummy sensor class object */ DS1820 ds1820(PC_9); /** * This event queue is the global event queue for both the * application and stack. To conserve memory, the stack is designed to run * in the same thread as the application and the application is responsible for * providing an event queue to the stack that will be used for ISR deferment as * well as application information event queuing. */ static EventQueue ev_queue(MAX_NUMBER_OF_EVENTS *EVENTS_EVENT_SIZE); /** * Event handler. * * This will be passed to the LoRaWAN stack to queue events for the * application which in turn drive the application. */ static void lora_event_handler(lorawan_event_t event); /** * Constructing Mbed LoRaWANInterface and passing it the radio object from lora_radio_helper. */ static LoRaWANInterface lorawan(radio); /** * Application specific callbacks */ static lorawan_app_callbacks_t callbacks; static void LoRa_PrintChannels() { /* print list of all channel frequencies */ lorawan_channelplan_t channelPlan {}; static loramac_channel_t channelbuf[10]; channelPlan.channels = channelbuf; if (lorawan.get_channel_plan(channelPlan) == LORAWAN_STATUS_OK) { for (uint8_t i = 0; i < channelPlan.nb_channels; i++) { loramac_channel_t chan = channelPlan.channels[i]; printf(" CHAN %d ID %d FREQ %lu RX1FREQ %lu Band %d DR min %d max %d\n", (int) i, (int) chan.id, chan.ch_param.frequency, chan.ch_param.rx1_frequency, (int) chan.ch_param.band, (int) chan.ch_param.dr_range.fields.min, (int) chan.ch_param.dr_range.fields.max); } } else { printf(" COULD NOT GET CHANNEL PLAN\n"); } } /** * Entry point for application */ int main(void) { static loramac_channel_t ttnChannels[] = { {0, {868100000, 0, {(DR_5 << 4) | DR_0}, 1}}, {1, {868300000, 0, {(DR_5 << 4) | DR_0}, 1}}, {2, {868500000, 0, {(DR_5 << 4) | DR_0}, 1}}, {3, {867100000, 0, {(DR_5 << 4) | DR_0}, 0}}, {4, {867300000, 0, {(DR_5 << 4) | DR_0}, 0}}, {5, {867500000, 0, {(DR_5 << 4) | DR_0}, 0}}, {6, {867700000, 0, {(DR_5 << 4) | DR_0}, 0}}, {7, {867900000, 0, {(DR_5 << 4) | DR_0}, 0}} }; lorawan_channelplan_t channelPlan {}; // setup tracing setup_trace(); // stores the status of a call to LoRaWAN protocol lorawan_status_t retcode; printf("---------------------------- \n"); // LORAWAN: Initialize LoRaWAN stack if (lorawan.initialize(&ev_queue) != LORAWAN_STATUS_OK) { printf(" LoRa initialization failed! \n"); return -1; } printf(" Mbed LoRaWANStack initialized \n"); // LORAWAN: prepare application callbacks callbacks.events = mbed::callback(lora_event_handler); lorawan.add_app_callbacks(&callbacks); // LORAWAN: Set number of retries in case of CONFIRMED messages if (lorawan.set_confirmed_msg_retries(LORAWAN_CONFIRMED_MSG_RETRY_COUNTER) != LORAWAN_STATUS_OK) { printf(" Set_confirmed_msg_retries failed! \n"); return -1; } printf(" CONFIRMED message retries : %d \n", LORAWAN_CONFIRMED_MSG_RETRY_COUNTER); // LORAWAN: settaggio canali channelPlan.channels = (loramac_channel_t*) ttnChannels; channelPlan.nb_channels = LORAWAN_CHANNEL_NBR; if (lorawan.set_channel_plan(channelPlan) == LORAWAN_STATUS_OK) { printf(" [+] Setting TTN channels\n"); } else { printf(" [-] Failed to set TTN channels! Debug return code.\n"); } LoRa_PrintChannels(); // LORAWAN: data rate // if (lorawan.enable_adaptive_datarate() != LORAWAN_STATUS_OK) { // printf("\r\n enable_adaptive_datarate failed! \r\n"); // return -1; // } // Enable adaptive data rate if (lorawan.disable_adaptive_datarate() != LORAWAN_STATUS_OK) { printf(" disable_adaptive_datarate failed! \r\n"); return -1; } printf(" Adaptive data rate (ADR) - disabled \r\n"); lorawan.set_datarate(LORAWAN_DATA_RATE); retcode = lorawan.connect(); if (retcode == LORAWAN_STATUS_OK || retcode == LORAWAN_STATUS_CONNECT_IN_PROGRESS) { } else { printf(" Connection error, code = %d \n", retcode); return -1; } printf(" Connection - In Progress ...\n"); // make your event queue dispatching events forever ev_queue.dispatch_forever(); return 0; } /** * Sends a message to the Network Server */ static void send_message() { uint16_t packet_len; int16_t retcode; float sensor_value; if (ds1820.begin()) { ds1820.startConversion(); sensor_value = ds1820.read(); printf("\n -------------------------\n"); printf(" Dummy Sensor Value = %3.1f \n", sensor_value); ds1820.startConversion(); } else { printf(" No sensor found \n"); return; } packet_len = sprintf((char *) tx_buffer, " Dummy Sensor Value is %3.1f", sensor_value); retcode = lorawan.send(LORAWAN_APP_PORT, tx_buffer, packet_len, LORAWAN_TX_MSG_TYPE); if (retcode < 0) { retcode == LORAWAN_STATUS_WOULD_BLOCK ? printf(" send - WOULD BLOCK\r\n") : printf(" send() - Error code %d \n", retcode); if (retcode == LORAWAN_STATUS_WOULD_BLOCK) { //retry in 3 seconds if (MBED_CONF_LORA_DUTY_CYCLE_ON) { ev_queue.call_in(LORAWAN_CHANNEL_RETRY, send_message); } } return; } printf(" %d bytes scheduled for transmission \n", retcode); memset(tx_buffer, 0, sizeof(tx_buffer)); } /** * Receive a message from the Network Server */ static void receive_message() { uint8_t port; int flags; int16_t retcode = lorawan.receive(rx_buffer, sizeof(rx_buffer), port, flags); if (retcode < 0) { printf(" receive() - Error code %d \r\n", retcode); return; } printf(" RX Data on port %u (%d bytes): ", port, retcode); for (uint8_t i = 0; i < retcode; i++) { printf("%02x ", rx_buffer[i]); } printf("\n"); memset(rx_buffer, 0, sizeof(rx_buffer)); } /** * Event handler */ static void lora_event_handler(lorawan_event_t event) { int16_t retcode; lorawan_tx_metadata additional_data; int backoff_data; switch (event) { case CONNECTED: printf(" Connection - Successful \n"); if (MBED_CONF_LORA_DUTY_CYCLE_ON) { send_message(); } else { ev_queue.call_every(TX_TIMER, send_message); } break; case DISCONNECTED: ev_queue.break_dispatch(); printf(" Disconnected Successfully \n"); break; case TX_DONE: printf(" Message Sent to Network Server \n"); retcode = lorawan.get_tx_metadata(additional_data); switch (retcode) { case LORAWAN_STATUS_NOT_INITIALIZED: printf(" Lorawan stack not initialized\n"); break; case LORAWAN_STATUS_METADATA_NOT_AVAILABLE: printf(" Metadata not available\n"); break; case LORAWAN_STATUS_OK : printf(" TX Channel: %d \n",additional_data.channel); printf(" TOA (msec): %d \n",additional_data.tx_toa); printf(" Data rate: %u \n",additional_data.data_rate); break; } retcode = lorawan.get_backoff_metadata(backoff_data); switch (retcode) { case LORAWAN_STATUS_NOT_INITIALIZED: printf(" Lorawan stack not initialized\n"); break; case LORAWAN_STATUS_METADATA_NOT_AVAILABLE: printf(" Backoff not available\n"); break; case LORAWAN_STATUS_OK : printf(" Backoff: %d \n",backoff_data); break; } if (MBED_CONF_LORA_DUTY_CYCLE_ON) { send_message(); } break; case TX_TIMEOUT: case TX_ERROR: case TX_CRYPTO_ERROR: case TX_SCHEDULING_ERROR: printf(" Transmission Error - EventCode = %d \r\n", event); // try again if (MBED_CONF_LORA_DUTY_CYCLE_ON) { send_message(); } break; case RX_DONE: printf(" Received message from Network Server \r\n"); receive_message(); break; case RX_TIMEOUT: case RX_ERROR: printf(" Error in reception - Code = %d \r\n", event); break; case JOIN_FAILURE: printf(" OTAA Failed - Check Keys \r\n"); break; case UPLINK_REQUIRED: printf(" Uplink required by NS \r\n"); if (MBED_CONF_LORA_DUTY_CYCLE_ON) { send_message(); } break; default: MBED_ASSERT(" Unknown Event"); } } // EOF