B-L072 ST Board BMP280 LoRaWAN end node
Dependencies: BME280
Temperature/Pressure LoRaWAN End Node
main.cpp
- Committer:
- saranjay
- Date:
- 2020-07-25
- Revision:
- 62:078d66d985f8
- Parent:
- 61:d220d51ae9d8
- Child:
- 63:7b4427c6bded
File content as of revision 62:078d66d985f8:
#include <stdio.h> #include "BME280.h" #include "lorawan/LoRaWANInterface.h" #include "lorawan/system/lorawan_data_structures.h" #include "events/EventQueue.h" #include "lora_radio_helper.h" using namespace events; /* * 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 CONFIRMED_MSG_RETRY_COUNTER 3 #define DEBUG 1 #define BUFFER_SIZE 12 // Max payload size can be LORAMAC_PHY_MAXPAYLOAD. // Use set_max_payload_length() function to change maximum payload capacity. uint8_t tx_buffer[BUFFER_SIZE]; BME280 sensor(PB_9, PB_8, 0x77); uint16_t packet_len = BUFFER_SIZE; float sensor_values[3]; /** * 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 send_message(); int main(void) { // stores the status of a call to LoRaWAN protocol lorawan_status_t retcode; // Initialize LoRaWAN stack if (lorawan.initialize(&ev_queue) != LORAWAN_STATUS_OK) { if(DEBUG) printf("\r\n LoRa initialization failed! \r\n"); return -1; } if(DEBUG) printf("\r\n Mbed LoRaWANStack initialized \r\n"); // prepare application callbacks callbacks.events = mbed::callback(lora_event_handler); lorawan.add_app_callbacks(&callbacks); // Set number of retries in case of CONFIRMED messages if (lorawan.set_confirmed_msg_retries(CONFIRMED_MSG_RETRY_COUNTER) != LORAWAN_STATUS_OK) { if(DEBUG) printf("\r\n set_confirmed_msg_retries failed! \r\n\r\n"); return -1; } if(DEBUG) printf("\r\n CONFIRMED message retries : %d \r\n", CONFIRMED_MSG_RETRY_COUNTER); // Enable adaptive data rate if (lorawan.enable_adaptive_datarate() != LORAWAN_STATUS_OK) { if(DEBUG) printf("\r\n enable_adaptive_datarate failed! \r\n"); return -1; } if(DEBUG) printf("\r\n Adaptive data rate (ADR) - Enabled \r\n"); retcode = lorawan.connect(); if (retcode == LORAWAN_STATUS_OK || retcode == LORAWAN_STATUS_CONNECT_IN_PROGRESS) { } else { if(DEBUG) printf("\r\n Connection error, code = %d \r\n", retcode); return -1; } if(DEBUG) printf("\r\n Connection - In Progress ...\r\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() { int16_t retcode; sensor.trigger(); sensor_values[0] = sensor.getTemperature(); sensor_values[1] = sensor.getPressure(); sensor_values[2] = sensor.getHumidity(); memcpy(tx_buffer, sensor_values, packet_len); retcode = lorawan.send(MBED_CONF_LORA_APP_PORT, tx_buffer, packet_len, MSG_UNCONFIRMED_FLAG); if (retcode < 0) { if(DEBUG) retcode == LORAWAN_STATUS_WOULD_BLOCK ? printf("send - WOULD BLOCK\r\n") : printf("\r\n send() - Error code %d \r\n", retcode); if (retcode == LORAWAN_STATUS_WOULD_BLOCK) { //retry in 3 seconds if (MBED_CONF_LORA_DUTY_CYCLE_ON) { ev_queue.call_in(3000, send_message); } } return; } if(DEBUG) printf("\r\n %d bytes scheduled for transmission \r\n", retcode); //Check if radio wakes up automatically. If not, then call radio.TX(); radio.sleep(); } /** * Receive a message from the Network Server */ static void receive_message() { } /** * Event handler */ static void lora_event_handler(lorawan_event_t event) { switch (event) { case CONNECTED: if(DEBUG) printf("\r\n Connection - Successful \r\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(); if(DEBUG) printf("\r\n Disconnected Successfully \r\n"); break; case TX_DONE: if(DEBUG) printf("\r\n Message Sent to Network Server \r\n"); if (MBED_CONF_LORA_DUTY_CYCLE_ON) { send_message(); } break; case TX_TIMEOUT: case TX_ERROR: case TX_CRYPTO_ERROR: case TX_SCHEDULING_ERROR: if(DEBUG) printf("\r\n Transmission Error - EventCode = %d \r\n", event); // try again if (MBED_CONF_LORA_DUTY_CYCLE_ON) { send_message(); } break; case RX_DONE: if(DEBUG) printf("\r\n Received message from Network Server \r\n"); receive_message(); break; case RX_TIMEOUT: case RX_ERROR: if(DEBUG) printf("\r\n Error in reception - Code = %d \r\n", event); break; case JOIN_FAILURE: if(DEBUG) printf("\r\n OTAA Failed - Check Keys \r\n"); break; case UPLINK_REQUIRED: if(DEBUG) printf("\r\n Uplink required by NS \r\n"); if (MBED_CONF_LORA_DUTY_CYCLE_ON) { send_message(); } break; default: MBED_ASSERT("Unknown Event"); } } // EOF