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--- sparrow_v4_en [2015/10/08 15:32]
dan.tudose [Shades and Colors]
+++ sparrow_v4_en [2016/11/03 16:34] (current)
dan.tudose [Light Sensor]
@@ Line 1: / Line 1: @@
 ====== Sparrow Wireless Sensor Node ======
+{{:sparrow_small.png?70 |}}
 Sparrow is an excellent platform for IoT, ultra low-power wireless computing and energy harvesting, with state-of-the-art sensing capabilities. It was designed to work with a range of wireless protocols, including IEEE 802.15.4, 6LoWPAN and ZigBee.
@@ Line 128: / Line 129: @@
 \\
-=== Temperature and Humidity Sensor ====
+===== Temperature and Humidity Sensor ======
 Si7021 is an integrated sensor that measures both temperature and relative humidity with good accuracy. The resolution of measured parameters can be selected through software between 8-12 bits for humidity and 12-14 bits for temperature. The sensor uses a digital I2C interface for data transmission, so we can easily interface with it using the Wire library.
@@ Line 139: / Line 140: @@
 #include <Wire.h>
 #include <SHT2x.h>
 int controlPin = 7;
 void setup()
 {
@@ Line 148: / Line 149: @@
   Wire.begin();
   Serial.begin(9600);
-}
+  digitalWrite(controlPin, LOW); //enable all sensors
+}
 void loop()
 {
-  digitalWrite(controlPin, LOW); //enable all sensors
   Serial.print("Humidity(%RH): ");
   Serial.print(SHT2x.GetHumidity());
   Serial.print("     Temperature(C): ");
   Serial.println(SHT2x.GetTemperature());
+  //digitalWrite(controlPin, HIGH); //disable all sensors
+  delay(1000);
+}
+</code>
+===== Light Sensor =====
+<imgcaption light | SI1145 ambient light sensor and AVR connection schematic>{{ ::si1145.png |}}</imgcaption>
+We will use the [[https://learn.adafruit.com/adafruit-si1145-breakout-board-uv-ir-visible-sensor/overview|Adafruit_SI1145]] library to interface with the sensor. Unzip the content of this {{::adafruit_si1145.zip| zip file}} into the //Arduino\libraries// or use Arduino IDE's Add ZIP Library command.
+<code C>
+#include <Wire.h>
+#include "Adafruit_SI1145.h"
+int controlPin = 7;
+Adafruit_SI1145 uv = Adafruit_SI1145();
+void setup() {
+  pinMode(controlPin, OUTPUT);  //sensor on/off control
+  delay(100);
+  digitalWrite(controlPin, LOW);
-  digitalWrite(controlPin, HIGH); //disable all sensors
+  delay(1000);
+  Serial.begin(9600);
+  Serial.println("Adafruit SI1145 test");
+  if (! uv.begin()) {
+    Serial.println("Didn't find Si1145");
+    while (1);
+  }
+  Serial.println("OK!");
+}
+void loop() {
+  Serial.println("===================");
+  Serial.print("Vis: "); Serial.println(uv.readVisible());
+  Serial.print("IR: "); Serial.println(uv.readIR());
+  // Uncomment if you have an IR LED attached to LED pin!
+  //Serial.print("Prox: "); Serial.println(uv.readProx());
+  float UVindex = uv.readUV();
+  // the index is multiplied by 100 so to get the
+  // integer index, divide by 100!
+  UVindex /= 100.0;
+  Serial.print("UV: ");  Serial.println(UVindex);
   delay(1000);
 }
+</code>
+===== Barometer =====
+<imgcaption barometer |  MS5637 barometer/altimeter>{{ ::ms5637-30ba_600.jpg |}}</imgcaption>
+The Sparrow nodes are using the [[http://www.meas-spec.com/product/pressure/MS5637-02BA03.aspx|MS5637]] pressure sensor for barometric and altimeter measurements. We will use the [[https://github.com/freetronics/BaroSensor|Freetronics]] library to interface with it.
+<code C>
+#include <Wire.h>
+#include <BaroSensor.h>
+int controlPin = 7;
+void setup()
+{
+  pinMode(controlPin, OUTPUT);  //sensor on/off control
+  delay(100);
+  digitalWrite(controlPin, LOW);
+  Serial.begin(9600);
+  BaroSensor.begin();
+}
+void loop()
+{
+  if(!BaroSensor.isOK()) {
+    Serial.print("Sensor not Found/OK. Error: ");
+    Serial.println(BaroSensor.getError());
+    BaroSensor.begin(); // Try to reinitialise the sensor if we can
+  }
+  else {
+    Serial.print("Temperature: ");
+    Serial.println(BaroSensor.getTemperature());
+    Serial.print("Pressure:    ");
+    Serial.println(BaroSensor.getPressure());
+  }
+  delay(1000);
+}
+</code>
+===== Radio Transmission =====
+We will use the [[https://code.google.com/p/zigduino-radio/|ZigduinoRadio]] library in order to send data between two or more Sparrow nodes. You can download the library from {{::zigduinoradio_201111130010.zip|here}}.
+Here's an example code:
+<code C>
+/*
+Run this sketch on two Zigduinos, open the serial monitor at 9600 baud, and type in stuff
+Watch the Rx Zigduino output what you've input into the serial port of the Tx Zigduino
+*/
+#include <ZigduinoRadio.h>
+void setup()
+{
+  ZigduinoRadio.begin(11);
+  Serial.begin(9600);
+  ZigduinoRadio.attachError(errHandle);
+  ZigduinoRadio.attachTxDone(onXmitDone);
+}
+void loop()
+{
+  if (Serial.available())
+  {
+    ZigduinoRadio.beginTransmission();
+    Serial.println();
+    Serial.print("Tx: ");
+    while(Serial.available())
+    {
+      char c = Serial.read();
+      Serial.write(c);
+      ZigduinoRadio.write(c);
+    }
+    Serial.println();
+    ZigduinoRadio.endTransmission();
+  }
+  if (ZigduinoRadio.available())
+  {
+    Serial.println();
+    Serial.print("Rx: ");
+    while(ZigduinoRadio.available())
+      Serial.write(ZigduinoRadio.read());
+    Serial.println();
+    Serial.print("LQI: ");
+    Serial.print(ZigduinoRadio.getLqi(), 10);
+    Serial.print(", RSSI: ");
+    Serial.print(ZigduinoRadio.getLastRssi(), 10);
+    Serial.print(" dBm, ED: ");
+    Serial.print(ZigduinoRadio.getLastEd(), 10);
+    Serial.println("dBm");
+  }
+  delay(1000);
+}
+void errHandle(radio_error_t err)
+{
+  Serial.println();
+  Serial.print("Error: ");
+  Serial.print((uint8_t)err, 10);
+  Serial.println();
+}
+void onXmitDone(radio_tx_done_t x)
+{
+  Serial.println();
+  Serial.print("TxDone: ");
+  Serial.print((uint8_t)x, 10);
+  Serial.println();
+}
 </code>

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