Dear Readers,
This schematic/circuit is a node for MySensor Gateway. For more information on Mysensor, please visit here
Material Required:
- Arduino Mini Pro 5V 16M
- NRF24L01+
- BMP180 Pressure sensor module
- DHT11 Temp+Humidity module
- Breadboard Power Supply
- Breadboard
- Jumper wire (Male/Female) as required
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| Arduino Mini Pro |
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| NRF24L01+ with homemade breadboard adapter |
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| DHT11 (Temperature+Humidity) |
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| BMP180 (Pressure+Temperature) |
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| Complete Parts |
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| Schematic |
Source Code:
I am still trying to figure out how I can get the code formatted on blogger, till then bear with me.
#include <SPI.h>
#include <MySensor.h>
#include <DHT.h>
#include <Wire.h>
#include <Adafruit_BMP085.h>
#define CHILD_ID_HUM 1
#define CHILD_ID_TEMP 2
#define CHILD_ID_BARO 3
#define CHILD_ID_BTEMP 4
#define HUMIDITY_SENSOR_DIGITAL_PIN 4
boolean metric = false;
int altitude = 216; // 741 feet above sealevel
float lastBmpTemp = -1;
float lastPressure = -1;
float lastHum = -1;
float lastTemp = -1;
int updateAll = 60;
int updateCount = 0;
unsigned long SLEEP_TIME = 60000;
Adafruit_BMP085 bmp = Adafruit_BMP085();
DHT dht;
MySensor gw;
MyMessage msgHum(CHILD_ID_HUM, V_HUM);
MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
MyMessage msgBtemp(CHILD_ID_BTEMP, V_TEMP);
MyMessage msgPressure(CHILD_ID_BARO, V_PRESSURE);
void setup()
{
analogReference(INTERNAL);
gw.begin();
dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN);
bmp.begin();
gw.sendSketchInfo("Weather Station", "1.0");
gw.present(CHILD_ID_HUM, S_HUM);
gw.present(CHILD_ID_TEMP, S_TEMP);
gw.present(CHILD_ID_BARO, S_BARO);
gw.present(CHILD_ID_BTEMP, S_TEMP);
metric = gw.getConfig().isMetric;
}
void loop()
{
updateCount += 1;
if (updateCount == updateAll) {
lastTemp = -1;
lastHum = -1;
lastBmpTemp = -1;
lastPressure = -1;
updateCount = 0;
}
delay(dht.getMinimumSamplingPeriod());
float temperature = dht.getTemperature();
if (isnan(temperature)) {
lastTemp = -1;
} else if (temperature != lastTemp) {
lastTemp = temperature;
if (!metric) {
//temperature = temperature * 1.8 + 32.0;
}
gw.send(msgTemp.set(temperature, 1));
}
float humidity = dht.getHumidity();
if (isnan(humidity)) {
lastHum = -1;
} else if (humidity != lastHum) {
lastHum = humidity;
gw.send(msgHum.set(humidity, 1));
}
float pressure = bmp.readSealevelPressure(altitude) * 0.01;
float bmptemp = bmp.readTemperature();
if (!metric) {
//bmptemp = bmptemp * 1.8 + 32.0;
}
if (bmptemp != lastBmpTemp) {
gw.send(msgBtemp.set(bmptemp,1));
lastBmpTemp = bmptemp;
}
if (pressure != lastPressure) {
gw.send(msgPressure.set(pressure, 0));
lastPressure = pressure;
}
gw.sleep(SLEEP_TIME);
}
Download Sketch here
