» Ag 01: Temperature Sensor
In this example the Agriculture 2.0 sensor board is turned on and the temperature sensor read every second approximately, printing the result through the USB port.
Required Materials
1 x Waspmote
1 x Battery
1 x Agriculture 2.0 board or Agriculture PRO 2.0 board
1 x Temperature sensor (MCP9700A)
Notes
* Remember to connect the battery to Waspmote for proper operation.
* The connection of the sensor is described in the Agriculture 2.0 technical guide.
* When turning on the temperature sensor you will be powering all the low consumption group sensors. See the Agriculture 2.0 board technical guide for more information.
* This example can only be executed in Waspmote v12
Code
/*
* --[Ag_1] - Reading the Temperature sensor at Agriculture v20 board--
*
* Explanation: Turn on the Ariculture v20 board and read the
* temperature sensor on it once every second
*
* Copyright (C) 2012 Libelium Comunicaciones Distribuidas S.L.
* http://www.libelium.com
*
* 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 <http://www.gnu.org/licenses/>.
*
* Version: 0.1
* Design: David Gascón
* Implementation: Manuel Calahorra
*/
#include <WaspSensorAgr_v20.h>
// Variable to store the read value
float value;
void setup()
{
// Turn on the USB and print a start message
USB.ON();
USB.println(F("start"));
delay(100);
// Turn on the sensor board
SensorAgrv20.ON();
// Turn on the RTC
RTC.ON();
}
void loop()
{
// Part 1: Sensor reading
// Turn on the sensor and wait for stabilization and response time
SensorAgrv20.setSensorMode(SENS_ON, SENS_AGR_TEMPERATURE);
delay(100);
// Read the temperature sensor
value = SensorAgrv20.readValue(SENS_AGR_TEMPERATURE);
// Turn off the sensor
SensorAgrv20.setSensorMode(SENS_OFF, SENS_AGR_TEMPERATURE);
// Part 2: USB printing
// Print the temperature value through the USB
USB.print(F("Temperature: "));
USB.print(value);
USB.println(F("ºC"));
delay(1000);
}
Output
B#
start
Temperature: 20.9677429199ºC
Temperature: 20.9677429199ºC
Temperature: 20.9677429199ºC
Temperature: 20.9677429199ºC