example using mbed loramac with GPS in application layer
This repository can work on NAmote72.
This main.cpp generates Cayenne LPP GPS payload.
See mbed documentation for provisioning instructions.
Diff: main.cpp
- Revision:
- 0:2e040cc7f7b8
diff -r 000000000000 -r 2e040cc7f7b8 main.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Thu Jan 03 16:18:09 2019 -0800 @@ -0,0 +1,406 @@ +/** + * 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" + +#include "mbed.h" +// Application helpers +#include "gps.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 CONFIRMED_MSG_RETRY_COUNTER 3 + +/** + * 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 down the radio object. + */ +static LoRaWANInterface lorawan(radio); + +/** + * Application specific callbacks + */ +static lorawan_app_callbacks_t callbacks; + +#ifdef TARGET_MOTE_L152RC + GPS gps(PB_6, PB_7, PB_11); // on-board GPS pins (tx, rx, en) +#elif defined(TARGET_FF_MORPHO) + /* https://www.sparkfun.com/products/13740 */ + #ifdef TARGET_DISCO_L072CZ_LRWAN1 + GPS gps(PA_9, PA_10, NC); + #else + GPS gps(PC_10, PC_11, NC); + #endif +#endif + +void gps_service() +{ + //int alt; + + gps.service(); + + //alt = atoi( gps.NmeaGpsData.NmeaAltitude ); + //printf("lat:%f lon:%f alt:%d\r\n", gps.Latitude, gps.Longitude, alt); +} + +#ifdef TARGET_MOTE_L152RC +typedef enum +{ + BOARD_VERSION_NONE = 0, + BOARD_VERSION_2, + BOARD_VERSION_3, +}BoardVersion_t; + +DigitalOut Pc7( PC_7 ); +DigitalIn Pc1( PC_1 ); +BoardVersion_t BoardGetVersion( void ) +{ + Pc7 = 1; + char first = Pc1; + Pc7 = 0; + + if( first && !Pc1 ) + { + return BOARD_VERSION_2; + } + else + { + return BOARD_VERSION_3; + } +} +AnalogIn *Battery; +#endif /* TARGET_MOTE_L152RC */ + +/** + * Entry point for application + */ +int main (void) +{ + // setup tracing + setup_trace(); + + // stores the status of a call to LoRaWAN protocol + lorawan_status_t retcode; + +#ifdef TARGET_MOTE_L152RC + switch( BoardGetVersion( ) ) + { + case BOARD_VERSION_2: + Battery = new AnalogIn( PA_0 ); + gps.en_invert = true; + printf("v2-mote\r\n"); + break; + case BOARD_VERSION_3: + Battery = new AnalogIn( PA_1 ); + gps.en_invert = false; + printf("v3-mote\r\n"); + break; + default: + break; + } +#endif /* TARGET_MOTE_L152RC */ + gps.init(); + gps.enable(1); + gps.m_uart.baud(9600); // override platform serial baud rate + + // Initialize LoRaWAN stack + if (lorawan.initialize(&ev_queue) != LORAWAN_STATUS_OK) { + printf("\r\n LoRa initialization failed! \r\n"); + return -1; + } + + 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) { + printf("\r\n set_confirmed_msg_retries failed! \r\n\r\n"); + return -1; + } + + 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) { + printf("\r\n enable_adaptive_datarate failed! \r\n"); + return -1; + } + + 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 { + printf("\r\n Connection error, code = %d \r\n", retcode); + return -1; + } + + printf("\r\n Connection - In Progress ...\r\n"); + + // make your event queue dispatching events forever + ev_queue.dispatch_forever(); + + return 0; +} + +#define LPP_DIGITAL_INPUT 0 // 1 byte +#define LPP_DIGITAL_OUTPUT 1 // 1 byte +#define LPP_ANALOG_INPUT 2 // 2 bytes, 0.01 signed +#define LPP_ANALOG_OUTPUT 3 // 2 bytes, 0.01 signed +#define LPP_LUMINOSITY 101 // 2 bytes, 1 lux unsigned +#define LPP_PRESENCE 102 // 1 byte, 1 +#define LPP_TEMPERATURE 103 // 2 bytes, 0.1°C signed +#define LPP_RELATIVE_HUMIDITY 104 // 1 byte, 0.5% unsigned +#define LPP_ACCELEROMETER 113 // 2 bytes per axis, 0.001G +#define LPP_BAROMETRIC_PRESSURE 115 // 2 bytes 0.1 hPa Unsigned +#define LPP_GYROMETER 134 // 2 bytes per axis, 0.01 °/s +#define LPP_GPS 136 // 3 byte lon/lat 0.0001 °, 3 bytes alt 0.01m + + +// Data ID + Data Type + Data Size +#define LPP_DIGITAL_INPUT_SIZE 3 +#define LPP_DIGITAL_OUTPUT_SIZE 3 +#define LPP_ANALOG_INPUT_SIZE 4 +#define LPP_ANALOG_OUTPUT_SIZE 4 +#define LPP_LUMINOSITY_SIZE 4 +#define LPP_PRESENCE_SIZE 3 +#define LPP_TEMPERATURE_SIZE 4 +#define LPP_RELATIVE_HUMIDITY_SIZE 3 +#define LPP_ACCELEROMETER_SIZE 8 +#define LPP_BAROMETRIC_PRESSURE_SIZE 4 +#define LPP_GYROMETER_SIZE 8 +#define LPP_GPS_SIZE 11 + +#define CAYENNE_CH_GPS 5 + + +/** + * Sends a message to the Network Server + */ +static void send_message() +{ + int32_t lat, lon, alt; + uint16_t packet_len; + int16_t retcode; + + lat = gps.Latitude * 10000; + lon = gps.Longitude * 10000; + alt = atoi(gps.NmeaGpsData.NmeaAltitude) * 100; + + packet_len = 0; + tx_buffer[packet_len++] = CAYENNE_CH_GPS; + tx_buffer[packet_len++] = LPP_GPS; + tx_buffer[packet_len++] = lat >> 16; + tx_buffer[packet_len++] = lat >> 8; + tx_buffer[packet_len++] = lat; + tx_buffer[packet_len++] = lon >> 16; + tx_buffer[packet_len++] = lon >> 8; + tx_buffer[packet_len++] = lon; + tx_buffer[packet_len++] = alt >> 16; + tx_buffer[packet_len++] = alt >> 8; + tx_buffer[packet_len++] = alt; + + retcode = lorawan.send(MBED_CONF_LORA_APP_PORT, tx_buffer, packet_len, + MSG_CONFIRMED_FLAG); + + if (retcode < 0) { + 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; + } + for (alt = 0; alt < packet_len; alt++) { + printf("%02x", tx_buffer[alt]); + } + + alt = atoi( gps.NmeaGpsData.NmeaAltitude ); + printf("\r\n %d bytes scheduled for tx\tlat:%f lon:%f alt:%d\r\n", retcode, gps.Latitude, gps.Longitude, (int)alt); + memset(tx_buffer, 0, sizeof(tx_buffer)); +} + +/** + * Receive a message from the Network Server + */ +static void receive_message() +{ + int16_t retcode; + retcode = lorawan.receive(MBED_CONF_LORA_APP_PORT, rx_buffer, + sizeof(rx_buffer), + MSG_CONFIRMED_FLAG|MSG_UNCONFIRMED_FLAG); + + if (retcode < 0) { + printf("\r\n receive() - Error code %d \r\n", retcode); + return; + } + + printf(" Data:"); + + for (uint8_t i = 0; i < retcode; i++) { + printf("%x", rx_buffer[i]); + } + + printf("\r\n Data Length: %d\r\n", retcode); + + memset(rx_buffer, 0, sizeof(rx_buffer)); +} + +/** + * Event handler + */ +static void lora_event_handler(lorawan_event_t event) +{ + + switch (event) { + case CONNECTED: + printf("\r\n Connection - Successful "); + ev_queue.call_every(1000, gps_service); + if (MBED_CONF_LORA_DUTY_CYCLE_ON) { + printf("DUTY_ON\r\n"); + send_message(); + } else { + printf("(duty off)\r\n"); + ev_queue.call_every(TX_TIMER, send_message); + } + + break; + case DISCONNECTED: + ev_queue.break_dispatch(); + printf("\r\n Disconnected Successfully \r\n"); + break; + case TX_DONE: + printf("\r\n Message Sent to Network Server \r\n"); + /*if (MBED_CONF_LORA_DUTY_CYCLE_ON) { + send_message(); + }*/ + break; + case TX_TIMEOUT: + printf("\r\nTX_TIMEOUT\r\n"); + // try again + /*if (MBED_CONF_LORA_DUTY_CYCLE_ON) { + send_message(); + }*/ + break; + case TX_ERROR: + // no ack was received after enough retries + printf("\r\nTX_ERROR\r\n"); + // try again + /*if (MBED_CONF_LORA_DUTY_CYCLE_ON) { + send_message(); + }*/ + break; + case TX_CRYPTO_ERROR: + printf("\r\nTX_CRYPTO_ERROR\r\n"); + // try again + /*if (MBED_CONF_LORA_DUTY_CYCLE_ON) { + send_message(); + }*/ + break; + case TX_SCHEDULING_ERROR: + printf("\r\nTX_SCHEDULING_ERROR\r\n"); + // try again + /*if (MBED_CONF_LORA_DUTY_CYCLE_ON) { + send_message(); + }*/ + break; + case RX_DONE: + printf("\r\n Received message from Network Server \r\n"); + receive_message(); + break; + case RX_TIMEOUT: + case RX_ERROR: + printf("\r\n Error in reception - Code = %d \r\n", event); + break; + case JOIN_FAILURE: + printf("\r\n OTAA Failed - Check Keys \r\n"); + break; + case UPLINK_REQUIRED: + 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