![](/media/cache/profiles/5a245e9a52805642a6a095aeb71ee307.jpg.50x50_q85.jpg)
Demo program for LoRaWan with data formated for cayenne interface on mydevices.com Check on https://goo.gl/fTUDNc
Demonstration d'un node LoRaWan sur carte : Discovery IOT STmicro : B-L072Z-LRWAN1 https://www.st.com/en/evaluation-tools/b-l072z-lrwan1.html
L e code original MBED-ARM : https://os.mbed.com/teams/mbed-os-examples/code/mbed-os-example-lorawan/ est une application de l'API LoRAWan https://os.mbed.com/docs/v5.9/reference/lorawan.html
Le code original a été adapté pour une carte B-L072Z-LRWAN1 équipée d'un capteur de température LM35 connecté en 3.3v sur le port PA_0 (port analogique AN0) Les données sont formatées "cayenne" et visualisables sur mydevices.com ( https://goo.gl/fTUDNc ) Documentation cayenne : https://mydevices.com/cayenne/docs/lora/#lora-cayenne-low-power-payload
Les essais ont été réalisés avec une passerelle TTN https://www.thethingsnetwork.org/ le "Payload Format" ayant été configuré pour "Cayenne LPP"
Des capteurs virtuels on été également ajoutés (humidité, température, lumière, etc...) pour les essais au format cayenne.
Données physiques transmises (downlink)
- Température sur capteur LM35 - Tension sur PA_1 (AN1) est transmise entre 0% et 100% - Etat du bouton bleu
Données physiques reçues (uplink) Un actionneur permet d'allumer/eteindre à distance la led verte de la carte B-L072Z-LRWAN1
L'interface mydevice.com proposé permet de visualiser :
- Les capteurs virtuels - La température réelle sur LM35 - L'état du bouton bleu
main.cpp
- Committer:
- cdupaty
- Date:
- 2018-11-29
- Revision:
- 43:74226f6ca42c
- Parent:
- 26:f07f5febf97f
File content as of revision 43:74226f6ca42c:
/** * 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. * * Adaptation for Discovery IOT STmicro B-L072Z-LRWAN1, TTN and CAYENNE (mydevices.com) * Christian Dupaty Lycee Fourcade 13120 Gardanne France * 11-2018 * Peripherals on B-L072Z-LRWAN1 LED1 = PB_5, // Green LED2 = PA_5, // Red LED3 = PB_6, // Blue LED4 = PB_7, // Red USER_BUTTON = PB_2, */ #include <stdio.h> #include "lorawan/LoRaWANInterface.h" #include "lorawan/system/lorawan_data_structures.h" #include "events/EventQueue.h" #include "CayenneLPP.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 CONFIRMED_MSG_RETRY_COUNTER 3 /** * Dummy pin for dummy sensor */ #define PC_9 0 /** * Dummy sensor class object */ DS1820 ds1820(PC_9); // added by C.Dupaty CayenneLPP cayenne(100); // data to cayenne format AnalogIn lm35(A0); // for test we have connect a //LM35 temperature captor on A0 Arduino analog port AnalogIn ana(A1); DigitalIn bp(USER_BUTTON); DigitalOut ledTest(LED1); /** * 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; /** * Entry point for application */ int main (void) { // setup tracing setup_trace(); // stores the status of a call to LoRaWAN protocol lorawan_status_t retcode; // Initialize LoRaWAN stack if (lorawan.initialize(&ev_queue) != LORAWAN_STATUS_OK) { printf("LoRa initialization failed! \r\n"); return -1; } printf("\r\nTEST LORAWAN Lycee Fourcade \r\n"); printf("--------------------------- \r\n"); printf("\r\nMbed 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("set_confirmed_msg_retries failed! \r\n\r\n"); return -1; } printf("CONFIRMED message retries : %d \r\n", CONFIRMED_MSG_RETRY_COUNTER); // Enable adaptive data rate if (lorawan.enable_adaptive_datarate() != LORAWAN_STATUS_OK) { printf("enable_adaptive_datarate failed! \r\n"); return -1; } printf("Adaptive data rate (ADR) - Enabled \r\n"); retcode = lorawan.connect(); if (retcode == LORAWAN_STATUS_OK || retcode == LORAWAN_STATUS_CONNECT_IN_PROGRESS) { } else { printf("Connection error, code = %d \r\n", retcode); return -1; } printf("Connection - In Progress ...\r\n"); printf("it may take a while\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() { uint16_t packet_len; int16_t retcode; float sensor_value; // dummy float lum=0.0; // dummy float hum; // dummy float temp; // dummy float an; // AN1 on Arduino connectors int btBleu; // The bleu button on Nucleo board float tempLM35; static int cpt=0; printf("\n\rEmission : %d\r\n",++cpt); printf("-------------\r\n"); // Dummy sensors are used for test only if (ds1820.begin()) { ds1820.startConversion(); sensor_value = ds1820.read(); printf("Dummy Sensor Value = %3.1f \r\n", sensor_value); ds1820.startConversion(); } else { printf("No sensor found \r\n"); return; } lum+=111.0; if (lum>9999.0) lum=0.0; hum+=2.5; if (temp>100.0) temp=1.1; an=ana.read()*100.0; btBleu=bp.read(); // LM35 must be connected on A0 analog port tempLM35=lm35.read()*330.0; printf("Capteur LM35 : %3.2f C\r\n", tempLM35); // mise en forme format CAYENNE LPP // doc ici https://mydevices.com/cayenne/docs/lora/#lora-cayenne-low-power-payload // doc logiciel : CayenneLPP.h cayenne.reset(); cayenne.addLuminosity(1, lum); cayenne.addPresence(2,1); cayenne.addTemperature(3, temp); cayenne.addRelativeHumidity(4, hum); cayenne.addDigitalInput(5, btBleu); cayenne.addAnalogInput(6, an); cayenne.addDigitalOutput(7,0); cayenne.addTemperature(8, tempLM35); cayenne.addTemperature(9, sensor_value); cayenne.copy(tx_buffer); packet_len=cayenne.getSize(); printf("Emission du packet : \n\r"); for (int i=0;i<packet_len;i++) printf("%02X ",tx_buffer[i]); printf("\n\r"); // packet_len = sprintf((char*) tx_buffer, "Dummy Sensor Value is %3.1f", sensor_value); 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("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; } printf("%d bytes scheduled for transmission \r\n", retcode); memset(tx_buffer, 0, sizeof(tx_buffer)); } /** * Receive a message from the Network Server */ static void receive_message() { int16_t retcode; uint8_t port; // var to store port number provided by the stack int flags; // var to store flags provided by the stack retcode = lorawan.receive( rx_buffer,sizeof(rx_buffer), port, flags); printf("\x1B[1m"); // yellow text if (retcode < 0) { printf("receive() - Error code %d \r\n", retcode); return; } printf(" Reception on port : %d \n",port); printf(" Flags are : %d \n",flags); printf(" Data: "); for (uint8_t i = 0; i < retcode; i++) { printf("%02X ", rx_buffer[i]); } printf("\n\r Data Length: %d\r\n", retcode); printf("\x1B[0m"); // white text printf("End reception\n\r"); if (rx_buffer[2]==0x64) ledTest=1; if (rx_buffer[2]==0x00) ledTest=0; memset(rx_buffer, 0, sizeof(rx_buffer)); } /** * Event handler */ static void lora_event_handler(lorawan_event_t event) { switch (event) { case CONNECTED: printf("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(); printf("Disconnected Successfully \r\n"); break; case TX_DONE: printf("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: 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