From 8da8d0c3d4b78a1a67a020dbe644245f8579958f Mon Sep 17 00:00:00 2001 From: LowPowerLab Date: Mon, 27 Jul 2015 18:50:42 -0400 Subject: [PATCH] Add WeatherShield sender sketch --- Examples/WeatherNode/WeatherNode.ino | 269 +++++++++++++++++++++++++++ 1 file changed, 269 insertions(+) create mode 100644 Examples/WeatherNode/WeatherNode.ino diff --git a/Examples/WeatherNode/WeatherNode.ino b/Examples/WeatherNode/WeatherNode.ino new file mode 100644 index 0000000..ce4400d --- /dev/null +++ b/Examples/WeatherNode/WeatherNode.ino @@ -0,0 +1,269 @@ +// ********************************************************************************************************** +// WeatherShield sketch that works with Moteinos equipped with RFM69W/RFM69HW and WeatherShield +// It sends periodic highly accurate weather readings (temp, hum, atm pressure) from the +// WeatherShield to the base node/gateway Moteino +// Can be adapted to use Moteinos/Arduinos using RFM12B or other RFM69 variants (RFM69CW, RFM69HCW) +// For use with MoteinoMEGA you will have to revisit the pin definitions defined below +// http://www.LowPowerLab.com/WeatherShield +// Used in this project: http://lowpowerlab.com/blog/2015/07/24/attic-fan-cooling-tests/ +// 2015-07-23 (C) Felix Rusu of http://www.LowPowerLab.com/ +// ********************************************************************************************************** +// License +// ********************************************************************************************************** +// This program is free software; you can redistribute it +// and/or modify it under the terms of the GNU General +// Public License as published by the Free Software +// Foundation; either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will +// be useful, but WITHOUT ANY WARRANTY; without even the +// implied warranty of MERCHANTABILITY or FITNESS FOR A +// PARTICULAR PURPOSE. See the GNU General Public +// License for more details. +// +// You should have received a copy of the GNU General +// Public License along with this program. +// If not, see . +// +// Licence can be viewed at +// http://www.gnu.org/licenses/gpl-3.0.txt +// +// Please maintain this license information along with authorship +// and copyright notices in any redistribution of this code +// *************************************************************************************************************************** +#include //get it here: http://github.com/lowpowerlab/rfm69 +#include //get it here: http://github.com/lowpowerlab/spiflash +#include //get it here: https://github.com/LowPowerLab/WirelessProgramming +#include //comes with Arduino + +#include //get it here: https://github.com/LowPowerLab/SFE_BMP180 +#include //get it here: https://github.com/LowPowerLab/SI7021 +#include //comes with Arduino + +#include //get library from: https://github.com/lowpowerlab/lowpower + //writeup here: http://www.rocketscream.com/blog/2011/07/04/lightweight-low-power-arduino-library/ + +//***************************************************************************************************************************** +// ADJUST THE SETTINGS BELOW DEPENDING ON YOUR HARDWARE/TRANSCEIVER SETTINGS/REQUIREMENTS +//***************************************************************************************************************************** +#define GATEWAYID 1 +#define NODEID 164 +#define NETWORKID 100 +//#define FREQUENCY RF69_433MHZ +//#define FREQUENCY RF69_868MHZ +#define FREQUENCY RF69_915MHZ //Match this with the version of your Moteino! (others: RF69_433MHZ, RF69_868MHZ) +#define ENCRYPTKEY "sampleEncryptKey" //has to be same 16 characters/bytes on all nodes, not more not less! +//#define IS_RFM69HW //uncomment only for RFM69HW! Leave out if you have RFM69W! +#define SEND_LOOPS 15 //send data this many sleep loops (15 loops of 8sec cycles = 120sec ~ 2 minutes) +//********************************************************************************************* +#define SLEEP_FASTEST SLEEP_15MS +#define SLEEP_FAST SLEEP_250MS +#define SLEEP_SEC SLEEP_1S +#define SLEEP_LONG SLEEP_2S +#define SLEEP_LONGER SLEEP_4S +#define SLEEP_LONGEST SLEEP_8S +period_t sleepTime = SLEEP_LONGEST; //period_t is an enum type defined in the LowPower library (LowPower.h) +//********************************************************************************************* +#define BATT_MONITOR_EN A3 //enables battery voltage divider to get a reading from a battery, disable it to save power +#define BATT_MONITOR A7 //through 1Meg+470Kohm and 0.1uF cap from battery VCC - this ratio divides the voltage to bring it below 3.3V where it is scaled to a readable range +#define BATT_CYCLES 2 //read and report battery voltage every this many sleep cycles (ex 30cycles * 8sec sleep = 240sec/4min). For 450 cyclesyou would get ~1 hour intervals +#define BATT_FORMULA(reading) reading * 0.00322 * 1.475 // >>> fine tune this parameter to match your voltage when fully charged +#define BATT_LOW 3.6 //(volts) +#define BATT_READ_LOOPS SEND_LOOPS*10 // read and report battery voltage every this many sleep cycles (ex 30cycles * 8sec sleep = 240sec/4min). For 450 cycles you would get ~1 hour intervals between readings +//***************************************************************************************************************************** +#define LED 9 //pin connected to onboard LED on regular Moteinos +//#define BLINK_EN //uncomment to blink LED on every send +#define SERIAL_EN //comment out if you don't want any serial output + +#ifdef SERIAL_EN + #define SERIAL_BAUD 115200 + #define DEBUG(input) {Serial.print(input);} + #define DEBUGln(input) {Serial.println(input);} + #define SERIALFLUSH() {Serial.flush();} +#else + #define DEBUG(input); + #define DEBUGln(input); + #define SERIALFLUSH(); +#endif +//***************************************************************************************************************************** + +//global program variables +SI7021 weatherShield_SI7021; +SFE_BMP180 weatherShield_BMP180; +RFM69 radio; +char Pstr[10]; +char buffer[50]; +SPIFlash flash(8, 0xEF30); //WINDBOND 4MBIT flash chip on CS pin D8 (default for Moteino) + +void setup(void) +{ +#ifdef SERIAL_EN + Serial.begin(SERIAL_BAUD); +#endif + pinMode(LED, OUTPUT); + + radio.initialize(FREQUENCY,NODEID,NETWORKID); +#ifdef IS_RFM69HW + radio.setHighPower(); //uncomment only for RFM69HW! +#endif + radio.encrypt(ENCRYPTKEY); + + sprintf(buffer, "WeatherMote - transmitting at: %d Mhz...", FREQUENCY==RF69_433MHZ ? 433 : FREQUENCY==RF69_868MHZ ? 868 : 915); + DEBUGln(buffer); + + //initialize weather shield sensors + weatherShield_SI7021.begin(); + if (weatherShield_BMP180.begin()) + { DEBUGln("BMP180 init success"); } + else { DEBUGln("BMP180 init fail\n"); } + + radio.sendWithRetry(GATEWAYID, "START", 6); + Blink(LED, 100);Blink(LED, 100);Blink(LED, 100); + + SERIALFLUSH(); + readBattery(); +} + +unsigned long doorPulseCount = 0; +char input=0; +double P; +byte sendLoops=0; +byte battReadLoops=0; +float batteryVolts = 5; +char* BATstr="BAT:5.00v"; //longest battery voltage reading message = 9chars +byte sendLen; + +void loop() +{ + if (battReadLoops--<=0) //only read battery every BATT_READ_LOOPS cycles + { + readBattery(); + battReadLoops = BATT_READ_LOOPS-1; + } + + if (sendLoops--<=0) //send readings every SEND_LOOPS + { + sendLoops = SEND_LOOPS-1; + P = getPressure(); + P*=0.0295333727; //transform to inHg + dtostrf(P, 3,2, Pstr); + sprintf(buffer, "BAT:%sv F:%d H:%d P:%s", BATstr, weatherShield_SI7021.getFahrenheitHundredths(), weatherShield_SI7021.getHumidityPercent(), Pstr); + + sendLen = strlen(buffer); + radio.sendWithRetry(GATEWAYID, buffer, sendLen, 1); //retry one time + DEBUG(buffer); DEBUG(" (packet length:"); DEBUG(sendLen); DEBUGln(")"); + + #ifdef BLINK_EN + Blink(LED, 5); + #endif + } + + //When this sketch is on a node where you can afford the power to keep the radio awake all the time + // you can make it receive messages and also make it wirelessly programmable + // otherwise this section can be removed + if (radio.receiveDone()) + { + boolean reportStatusRequest=false; + DEBUG('[');DEBUG(radio.SENDERID);DEBUG("] "); + for (byte i = 0; i < radio.DATALEN; i++) + DEBUG((char)radio.DATA[i]); + + // wireless programming token check - this only works when radio is kept awake to listen for WP tokens + CheckForWirelessHEX(radio, flash, true); + + //first send any ACK to request + DEBUG(" [RX_RSSI:");DEBUG(radio.RSSI);DEBUG("]"); + if (radio.ACKRequested()) + { + radio.sendACK(); + DEBUG(" - ACK sent."); + } + DEBUGln(); + } + + SERIALFLUSH(); + radio.sleep(); //you can comment out this line if you want this node to listen for wireless programming requests + LowPower.powerDown(sleepTime, ADC_OFF, BOD_OFF); + DEBUGln("WAKEUP"); +} + +double getPressure() +{ + char status; + double T,P,p0,a; + // If you want sea-level-compensated pressure, as used in weather reports, + // you will need to know the altitude at which your measurements are taken. + // We're using a constant called ALTITUDE in this sketch: + + // If you want to measure altitude, and not pressure, you will instead need + // to provide a known baseline pressure. This is shown at the end of the sketch. + // You must first get a temperature measurement to perform a pressure reading. + // Start a temperature measurement: + // If request is successful, the number of ms to wait is returned. + // If request is unsuccessful, 0 is returned. + status = weatherShield_BMP180.startTemperature(); + if (status != 0) + { + // Wait for the measurement to complete: + delay(status); + + // Retrieve the completed temperature measurement: + // Note that the measurement is stored in the variable T. + // Function returns 1 if successful, 0 if failure. + status = weatherShield_BMP180.getTemperature(T); + if (status != 0) + { + // Start a pressure measurement: + // The parameter is the oversampling setting, from 0 to 3 (highest res, longest wait). + // If request is successful, the number of ms to wait is returned. + // If request is unsuccessful, 0 is returned. + status = weatherShield_BMP180.startPressure(3); + if (status != 0) + { + // Wait for the measurement to complete: + delay(status); + + // Retrieve the completed pressure measurement: + // Note that the measurement is stored in the variable P. + // Note also that the function requires the previous temperature measurement (T). + // (If temperature is stable, you can do one temperature measurement for a number of pressure measurements.) + // Function returns 1 if successful, 0 if failure. + status = weatherShield_BMP180.getPressure(P,T); + if (status != 0) + { + return P; + } + } + } + } + return 0; +} + +void readBattery() +{ + unsigned int readings=0; + + //enable battery monitor on WeatherShield (via mosfet controlled by A3) + pinMode(BATT_MONITOR_EN, OUTPUT); + digitalWrite(BATT_MONITOR_EN, LOW); + + for (byte i=0; i<5; i++) //take several samples, and average + readings+=analogRead(BATT_MONITOR); + + //disable battery monitor + pinMode(BATT_MONITOR_EN, INPUT); //highZ mode will allow p-mosfet to be pulled high and disconnect the voltage divider on the weather shield + + batteryVolts = BATT_FORMULA(readings / 5.0); + dtostrf(batteryVolts,3,2, BATstr); //update the BATStr which gets sent every BATT_CYCLES or along with the MOTION message + if (batteryVolts <= BATT_LOW) BATstr = "LOW"; +} + +void Blink(byte PIN, byte DELAY_MS) +{ + pinMode(PIN, OUTPUT); + digitalWrite(PIN,HIGH); + delay(DELAY_MS/2); + digitalWrite(PIN,LOW); + delay(DELAY_MS/2); +} \ No newline at end of file