![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
testBG
Dependencies: BMP180 Si7020 mbed
MAXWSNENV_sensors
Diff: main.cpp
- Revision:
- 0:c73e35945f19
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/main.cpp Thu Jul 02 15:12:39 2015 +0000 @@ -0,0 +1,90 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * 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 <string.h> +#include "mbed.h" +#include "BMP180.h" +#include "Si7020.h" + +// User I/O objects +DigitalOut red(LED_RED, LED_OFF); + +// Sensor objects +I2C i2c(I2C_SDA, I2C_SCL); +AnalogIn light_ain(AIN_0D); +DigitalOut light_en(P0_2, 1); + +BMP180 bmp180(&i2c); +Si7020 si7020(&i2c); + +int currentPressure; +float currentHumidity; +float currentTemperature; +float currentLight; + +// ***************************************************************************** +int main(void) +{ + printf("\n\nEnvironmental sensor demo\n"); + + /* Setup BMP180 */ + while(bmp180.init() != 0) { + printf("Failed to initialize barometer\n"); + wait(1); + } + + while (true) { + + // Start non-blocking readings + bmp180.startPressure(BMP180::STANDARD); + si7020.startHumidity(); + + // Toggle LED and wait between readings + red = 1; + wait(1); + red = 0; + + // Enable light sensor to charge capacitor + light_en = 0; + + // Get Pressure + if(bmp180.getPressure(¤tPressure) != 0) { + printf("Error getting pressure\n"); + } + + // Get Humidity + if(si7020.checkHumidity(¤tHumidity) != 0) { + printf("Error getting humidity\n"); + } + + // Get temperature + if(si7020.getPrevTemperature(¤tTemperature) != 0) { + printf("Error getting temperature\n"); + } + + // Get light + currentLight = light_ain.read(); + + // Disable light sensor + light_en = 1; + + printf("Press = %0.1f kPa\n", (float)(currentPressure/1000.0)); + printf("Humid = %0.1f %%\n", currentHumidity); + printf("Temp = %0.1f C\n", currentTemperature); + printf("Light = %0.1f %% \n", currentLight*100.0f); + printf("\n"); + } +}