497 lines
16 KiB
Arduino
497 lines
16 KiB
Arduino
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/* This file has been prepared for Doxygen **************************/
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/*! \file LoRa_Radio_Module_abp_s_BME280.ino **************************
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*
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* \brief Device ID 5935br27node004
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*
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* The payload for all environment nodes are standardized by:
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* 1. node (node identification, 0..255)
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* 2. battery (battery voltage [V])
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* 3. vcc (system power supply [V])
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* 4. temperature (environment air temperature [C])
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* 5. pressure (environment air pressure [Pa])
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* 6. humidity (environment air humidity [%])
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*
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* Copyright (C) 2019 W.Nijs (ALF4all)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* \author W.Nijs.
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* \date 25/10/2019
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* \version 1.0 25/10/2019, initial revision, W.Nijs
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*
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*********************************************************************/
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/*********************************************************************
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* The TTN Payload function equal for all environment applications
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**********************************************************************
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function Decoder(bytes, port) {
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var retValue = {
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bytes: bytes
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};
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retValue.node = bytes[0];
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retValue.battery = bytes[1] / 10.0;
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retValue.vcc = bytes[2] / 10.0;
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retValue.temperature = (((bytes[3] << 8) | bytes[4]) / 10.0) - 40.0;
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retValue.pressure = ((bytes[5] << 16) | (bytes[6] << 8) | bytes[7]);
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retValue.humidity = ((bytes[8] << 8) | bytes[9]) / 10.0;
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return retValue;
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}
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*********************************************************************/
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/*****************************************************************//**
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* Include section
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*********************************************************************/
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#include <lmic.h>
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#include <hal/hal.h>
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#include <Wire.h>
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#include <SparkFunBME280.h>
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#include <LowPower.h>
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/*****************************************************************//**
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* Define section
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*********************************************************************/
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#define LED 13 // on board LED
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#define BATTERY A0
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#define NODE_ID 1
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#define PAYLOAD_LENGHT 10
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#define SEA_LEVEL 101900 // [Pa]
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/*****************************************************************//**
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* Payload vars and objects for node, battery and the BME/P-280
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*********************************************************************/
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float node = 0;
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float battery = 0;
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float vcc = 0;
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BME280 bme280; // BME280 object
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float temperature = 0;
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float pressure = 0;
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float humidity = 0;
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float altitude = 0; // not used in the payload
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unsigned char payload[PAYLOAD_LENGHT]; // Payload
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/*****************************************************************//**
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* TTN keys and addresses for device ID 5935br27node000
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*********************************************************************/
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// LoRaWAN NwkSKey, network session key
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// Copy from TTN Console MSB first!
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static const PROGMEM u1_t NWKSKEY[16] = { 0x4D, 0x84, 0x88, 0x5D, 0xA6, 0xB9, 0x8C, 0x1D, 0x88, 0xE4, 0xEB, 0xB5, 0x54, 0x9D, 0x1F, 0x8E };
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// LoRaWAN AppSKey, application session key
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// Copy from TTN Console MSB first!
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static const u1_t PROGMEM APPSKEY[16] = { 0x23, 0xC0, 0xDA, 0x4A, 0xE3, 0x83, 0xD3, 0xC2, 0x65, 0xCF, 0x26, 0x3E, 0x2A, 0x76, 0xE3, 0x57 };
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// LoRaWAN end-device address (DevAddr)
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static const u4_t DEVADDR = { 0x26011995 }; // <-- Change this address for every node!
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// These callbacks are only used in over-the-air activation, so they are
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// left empty here (we cannot leave them out completely unless
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// DISABLE_JOIN is set in config.h, otherwise the linker will complain).
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void os_getArtEui (u1_t* buf) { }
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void os_getDevEui (u1_t* buf) { }
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void os_getDevKey (u1_t* buf) { }
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/*****************************************************************//**
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* LoRa vars
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*********************************************************************/
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//int sleepcycles = 75; // every sleep cycle takes 8 secs -> 10 min
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int sleepcycles = 8; // every sleep cycle takes 8 secs -> 1 min
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bool joined = false;
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bool sleeping = false;
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static osjob_t sendjob;
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/*****************************************************************//**
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* RFM95 pin mapping section
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* Mapping for the LoRa Radio Node
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*********************************************************************/
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const lmic_pinmap lmic_pins = {
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.nss = 10,
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.rxtx = LMIC_UNUSED_PIN,
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.rst = 9,
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.dio = {/*dio0*/ 2, /*dio1*/ 5, /*dio2*/ 6},
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};
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/*****************************************************************//**
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* readBattery()
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*********************************************************************/
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float readBattery(void) {
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float sensor = 0;
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float result = 0;
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sensor = analogRead(BATTERY);
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// 2M, 470K divider across battery and using the internal ADC ref
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// of 1.1V.
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// The sense point is bypassed with 100 nF to reduce noise at that
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// point.
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// Vmax = ((2e6+470e3)/470e3)*1.1V = 5,78V
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// Resolution = 5,78/1023 = 5.65mV/bit
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// Voltage divider current = 3V/2.47M = 1.22uA
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result = sensor * 0.00565;
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return result; // Return battery voltage in V
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};
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/*****************************************************************//**
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* readVcc()
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*********************************************************************/
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float readVcc(void) {
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float result = 0;
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ADMUX = _BV(REFS0) | _BV(MUX3) | _BV(MUX2) | _BV(MUX1);
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delay(2); // Wait for Vref to settle
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ADCSRA |= _BV(ADSC); // Start conversion
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while (bit_is_set(ADCSRA,ADSC)); // Wait conversion is ready
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uint8_t low = ADCL; // Read ADCL first - it then locks ADCH
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uint8_t high = ADCH; // unlocks both
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result = (float)((high<<8) | low);
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result = 1125300L/result; // Calculate battery voltage in mV
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return (result/1000); // Return battery voltage in V
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};
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/*****************************************************************//**
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* getParameters()
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*********************************************************************/
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void getParameters(void) {
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node = NODE_ID;
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battery = readBattery(); // [V 0.1]
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vcc = readVcc(); // [V 0.1]
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temperature = bme280.readTempC(); // [C 0.1]
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pressure = bme280.readFloatPressure(); // [Pa 1]
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humidity = bme280.readFloatHumidity(); // [% 0.1]
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// not a part of the payload:
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altitude = bme280.readFloatAltitudeMeters(); // [m 0.01]
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};
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/*****************************************************************//**
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* payloadEncode()
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*********************************************************************/
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void payloadEncode(void) {
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int i = 0;
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// Payload encode algorithm
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// nod [0..255]
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// bat [0.0..5.5V] => bat = bat * 10; => [0..55]
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// vcc [0.0..5.5V] => vcc = vcc * 10; => [0..55]
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// tmp [-40..85C] => tmp = tmp + 40; => [0..125] => tmp = tmp * 10; => [0..1250]
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// prs [30000..110000Pa]
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// hum [0.0..100.0% RH] => hum = hum * 10 => [0..1000]
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unsigned int nod = (unsigned char)(node);
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unsigned char bat = (unsigned char)(battery * 10);
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unsigned char mcu = (unsigned char)(vcc * 10);
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unsigned int tmp = (unsigned int)((temperature + 40.0) * 10.0);
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unsigned long prs = (unsigned long)(pressure);
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unsigned int hum = (unsigned int)(humidity * 10);
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payload[i++] = nod; // nod => 1 byte
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payload[i++] = bat; // bat => 1 byte
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payload[i++] = mcu; // vcc => 1 byte
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payload[i++] = tmp >> 8; // tmp => 2 bytes
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payload[i++] = tmp;
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payload[i++] = prs >> 16; // prs => 3 bytes
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payload[i++] = prs >> 8;
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payload[i++] = prs;
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payload[i++] = hum >> 8; // hum => 2 bytes
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payload[i++] = hum;
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};
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/*****************************************************************//**
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* parameter_print()
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* Only for debugging
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*********************************************************************/
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void parameterPrint(void) {
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/* Serial.print("Node id = ");
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Serial.println(node, 0);
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Serial.print("Battery = ");
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Serial.print(battery, 1);
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Serial.println(" V");
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Serial.print("Vcc = ");
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Serial.print(vcc, 1);
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Serial.println(" V");
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Serial.print("Temperature = ");
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Serial.print(temperature, 1);
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Serial.println(" *C");
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Serial.print("Pressure = ");
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Serial.print((pressure), 0);
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Serial.println(" Pa");
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Serial.print("Humidity = ");
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Serial.print(humidity, 1);
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Serial.println(" %");
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Serial.print("Altitude = ");
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Serial.print(altitude, 2);
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Serial.println(" m");
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*/
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};
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/*****************************************************************//**
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* payload_print()
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* Only for debugging
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*********************************************************************/
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void payloadPrint(void) {
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int i = 0;
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Serial.print("Payload = ");
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for (i = 0; i < PAYLOAD_LENGHT; i++ ) {
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if (payload[i] < 16)
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Serial.print("0");
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Serial.print(payload[i], HEX);
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Serial.print(" ");
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};
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Serial.println("");
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};
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/*****************************************************************//**
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* onEvent()
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* Event handler
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*********************************************************************/
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void onEvent (ev_t ev) {
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Serial.print(os_getTime());
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Serial.print(": ");
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switch(ev) {
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case EV_SCAN_TIMEOUT:
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Serial.println(F("EV_SCAN_TIMEOUT"));
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break;
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case EV_BEACON_FOUND:
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Serial.println(F("EV_BEACON_FOUND"));
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break;
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case EV_BEACON_MISSED:
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Serial.println(F("EV_BEACON_MISSED"));
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break;
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case EV_BEACON_TRACKED:
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Serial.println(F("EV_BEACON_TRACKED"));
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break;
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case EV_JOINING:
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Serial.println(F("EV_JOINING"));
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break;
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case EV_JOINED:
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Serial.println(F("EV_JOINED"));
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break;
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case EV_RFU1:
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Serial.println(F("EV_RFU1"));
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break;
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case EV_JOIN_FAILED:
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Serial.println(F("EV_JOIN_FAILED"));
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break;
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case EV_REJOIN_FAILED:
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Serial.println(F("EV_REJOIN_FAILED"));
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break;
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case EV_TXCOMPLETE:
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sleeping = true;
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Serial.println(F("EV_TXCOMPLETE (includes waiting for RX windows)"));
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if (LMIC.txrxFlags & TXRX_ACK)
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Serial.println(F("Received ack"));
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if (LMIC.dataLen) {
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Serial.println(F("Received "));
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Serial.println(LMIC.dataLen);
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Serial.println(F(" bytes of payload"));
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}
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delay(50); // delay to complete Serial Output before Sleeping
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break;
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case EV_LOST_TSYNC:
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Serial.println(F("EV_LOST_TSYNC"));
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break;
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case EV_RESET:
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Serial.println(F("EV_RESET"));
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break;
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case EV_RXCOMPLETE:
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// data received in ping slot
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Serial.println(F("EV_RXCOMPLETE"));
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break;
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case EV_LINK_DEAD:
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Serial.println(F("EV_LINK_DEAD"));
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break;
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case EV_LINK_ALIVE:
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Serial.println(F("EV_LINK_ALIVE"));
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break;
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default:
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Serial.println(F("Unknown event"));
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break;
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};
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};
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/*****************************************************************//**
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* sendMessage()
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*
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*********************************************************************/
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void sendMessage(osjob_t* j) {
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getParameters();
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parameterPrint(); // Optional, only for debugging
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payloadEncode();
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payloadPrint(); // Optional, only for debugging
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// First check if there is not a current TX/RX job running
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if (LMIC.opmode & OP_TXRXPEND) {
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Serial.println(F("OP_TXRXPEND, not sending"));
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} else {
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// Prepare upstream data transmission at the next possible time.
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LMIC_setTxData2(1, (uint8_t*)payload, PAYLOAD_LENGHT, 0);
|
||
|
|
Serial.println(F("Sending: "));
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/*****************************************************************//**
|
||
|
|
* Setup function
|
||
|
|
*********************************************************************/
|
||
|
|
|
||
|
|
void setup() {
|
||
|
|
Serial.begin(115200);
|
||
|
|
Serial.println(F("=================="));
|
||
|
|
Serial.println(F("- TTN BME280 ABP -"));
|
||
|
|
Serial.println(F("- ALF4all -"));
|
||
|
|
Serial.println(F("=================="));
|
||
|
|
|
||
|
|
digitalWrite(LED, LOW); // init LED_BUILTIN as LOW
|
||
|
|
pinMode(LED, OUTPUT); // init LED_BUILTIN as an output
|
||
|
|
analogReference(INTERNAL); // 1.1V ref for readBattery(void)
|
||
|
|
|
||
|
|
bme280.setI2CAddress(0x76); // Attention:
|
||
|
|
// Aliexpress is 0x76
|
||
|
|
// Sparkfun and Adafruit is 0x77
|
||
|
|
bme280.reset();
|
||
|
|
bme280.begin();
|
||
|
|
bool status;
|
||
|
|
if (bme280.beginI2C() == false) {
|
||
|
|
Serial.println(F("Sensor did not respond, check wiring."));
|
||
|
|
// while(1); // Freeze... with no action???
|
||
|
|
};
|
||
|
|
|
||
|
|
bme280.setReferencePressure(SEA_LEVEL);
|
||
|
|
|
||
|
|
// LMIC init
|
||
|
|
os_init();
|
||
|
|
// Reset the MAC state. Session and pending data transfers will be discarded.
|
||
|
|
LMIC_reset();
|
||
|
|
|
||
|
|
// Set static session parameters. Instead of dynamically establishing a session
|
||
|
|
// by joining the network, precomputed session parameters are be provided.
|
||
|
|
#ifdef PROGMEM
|
||
|
|
// On AVR, these values are stored in flash and only copied to RAM
|
||
|
|
// once. Copy them to a temporary buffer here, LMIC_setSession will
|
||
|
|
// copy them into a buffer of its own again.
|
||
|
|
uint8_t appskey[sizeof(APPSKEY)];
|
||
|
|
uint8_t nwkskey[sizeof(NWKSKEY)];
|
||
|
|
memcpy_P(appskey, APPSKEY, sizeof(APPSKEY));
|
||
|
|
memcpy_P(nwkskey, NWKSKEY, sizeof(NWKSKEY));
|
||
|
|
LMIC_setSession (0x1, DEVADDR, nwkskey, appskey);
|
||
|
|
#else
|
||
|
|
// If not running an AVR with PROGMEM, just use the arrays directly
|
||
|
|
LMIC_setSession (0x1, DEVADDR, NWKSKEY, APPSKEY);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(CFG_eu868)
|
||
|
|
// Set up the channels used by the Things Network, which corresponds
|
||
|
|
// to the defaults of most gateways. Without this, only three base
|
||
|
|
// channels from the LoRaWAN specification are used, which certainly
|
||
|
|
// works, so it is good for debugging, but can overload those
|
||
|
|
// frequencies, so be sure to configure the full frequency range of
|
||
|
|
// your network here (unless your network autoconfigures them).
|
||
|
|
// Setting up channels should happen after LMIC_setSession, as that
|
||
|
|
// configures the minimal channel set.
|
||
|
|
// NA-US channels 0-71 are configured automatically
|
||
|
|
LMIC_setupChannel(0, 868100000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
|
||
|
|
LMIC_setupChannel(1, 868300000, DR_RANGE_MAP(DR_SF12, DR_SF7B), BAND_CENTI); // g-band
|
||
|
|
LMIC_setupChannel(2, 868500000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
|
||
|
|
LMIC_setupChannel(3, 867100000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
|
||
|
|
LMIC_setupChannel(4, 867300000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
|
||
|
|
LMIC_setupChannel(5, 867500000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
|
||
|
|
LMIC_setupChannel(6, 867700000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
|
||
|
|
LMIC_setupChannel(7, 867900000, DR_RANGE_MAP(DR_SF12, DR_SF7), BAND_CENTI); // g-band
|
||
|
|
LMIC_setupChannel(8, 868800000, DR_RANGE_MAP(DR_FSK, DR_FSK), BAND_MILLI); // g2-band
|
||
|
|
// TTN defines an additional channel at 869.525Mhz using SF9 for class B
|
||
|
|
// devices' ping slots. LMIC does not have an easy way to define set this
|
||
|
|
// frequency and support for class B is spotty and untested, so this
|
||
|
|
// frequency is not configured here.
|
||
|
|
#elif defined(CFG_us915)
|
||
|
|
// NA-US channels 0-71 are configured automatically
|
||
|
|
// but only one group of 8 should (a subband) should be active
|
||
|
|
// TTN recommends the second sub band, 1 in a zero based count.
|
||
|
|
// https://github.com/TheThingsNetwork/gateway-conf/blob/master/US-global_conf.json
|
||
|
|
LMIC_selectSubBand(1);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
// Disable link check validation
|
||
|
|
LMIC_setLinkCheckMode(0);
|
||
|
|
|
||
|
|
// TTN uses SF9 for its RX2 window.
|
||
|
|
LMIC.dn2Dr = DR_SF9;
|
||
|
|
|
||
|
|
// Set data rate and transmit power for uplink (note: txpow seems to be ignored by the library)
|
||
|
|
LMIC_setDrTxpow(DR_SF7,14);
|
||
|
|
|
||
|
|
// Start job
|
||
|
|
sendMessage(&sendjob);
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/*****************************************************************//**
|
||
|
|
* Loop function
|
||
|
|
*********************************************************************/
|
||
|
|
|
||
|
|
void loop() {
|
||
|
|
sendMessage(&sendjob); // Transmit sensor values
|
||
|
|
|
||
|
|
// go sleeping
|
||
|
|
while(sleeping == false) {
|
||
|
|
os_runloop_once();
|
||
|
|
};
|
||
|
|
sleeping = false;
|
||
|
|
for (int i=0;i<sleepcycles;i++) {
|
||
|
|
LowPower.powerDown(SLEEP_8S, ADC_OFF, BOD_OFF);
|
||
|
|
};
|
||
|
|
};
|