1. Temperature and Humidity Lab.

2. Lab for Temp. and Humidity

3. Temp. and Humidity Configuration
SHT11 sensor module
SHT11 containing temp. and humidity sensors is directly connected to Atmega 128.
SHT11 includes itself ADC device for conversion.
Component in TinyOS
HumidityC

4. HumidityC component ADCC functions HumidityC functions humidity
 HumidityC functions
 humidity
 Humidity.getData() – read data from ADC in SHT11.
 event Humidity.dataReady(uint16_t data)
temperature
 Temperature.getData()
 event Temperature.dataReady (uint16_t data)

5. OscilloscopeSHT11 lab.

6. OscilloscopeSHT11 lab. OscilloscopeSHT11 location
c:\Programfiles\UCB\cygwin\opt\tinyos‐1.x\contrib\zigbex\Osilloscope SHT11\
Oscilloscope.nc, OscilloscopeM.nc, & OscopeMsg.h 

7. Oscilloscope.nc Oscilloscope.nc OsilloscopeSHT11 components
UART Comm – PC connection
HumidityC
TimerC & LedsC
configuration Oscilloscope { }
implementation {
  components Main, OscilloscopeM, TimerC, LedsC
             , HumidityC as SHT11, UARTComm as Comm;
  Main.StdControl ‐> OscilloscopeM;
  Main.StdControl ‐> TimerC;
  OscilloscopeM.Timer ‐> TimerC.Timer[unique("Timer")];
  OscilloscopeM.Leds ‐> LedsC;
  OscilloscopeM.SHT11_Humidity ‐> SHT11.Humidity;
  … }

8. OscilloscopeM.nc OscilloscopeM.nc (1) includes OscopeMsg;
module OscilloscopeM {
  provides interface StdControl;
  uses {
    … // interface
  }
} implementation {
uint8_t mytemp, myhumi;
   … // variables
   command result_t StdControl.init() {
     …
// initialization
    return SUCCESS;

9. OscilloscopeM.nc OscilloscopeM.nc (2)
command result_t StdControl.start() {
    call SensorControl.start();
    call Timer.start(TIMER_REPEAT, 125);
    call CommControl.start();
    call SplitControl.start();
    return SUCCESS;
  }
command result_t StdControl.stop() {
    …
return SUCCESS;  }
event result_t Timer.fired() {
    timetick++;
    //return call SHT11_Temp.getData();
    return call SHT11_Humidity.getData();

10. OscilloscopeM.nc OscilloscopeM.nc (3)
async event result_t SHT11_Humidity.dataReady
(uint16_t data) {
    struct OscopeMsg *pack;
    atomic {
      pack = (struct OscopeMsg *)
humimsg[currentTempMsg].data;
      calc_SHT11(data,data);
      pack‐>data[HumipacketReadingNumber++]=myhumi;
      HumireadingNumber++;
      dbg(DBG_USR1, "data_event\n");
      if (HumipacketReadingNumber == BUFFER_SIZE) {
         post dataTaskHumi();
      }
    }
    if (data > 0x0300)
      call Leds.redOn();
    else
      call Leds.redOff();
    return SUCCESS;  }

11. OscilloscopeM.nc OscilloscopeM.nc (4)
void calc_SHT11 (uint16_t p_humidity, …)  {
    …
    //calc. Temperature from ticks to [C]
    t_C=t*0.01 ‐ 40;
//calc. Humidity from ticks to [%RH]
    rh_lin=C3*rh*rh + C2*rh + C1;
    mytemp=(uint8_t)t_C; //return temperature [C]
    myhumi=(uint8_t)rh_true; //return humidity[%RH]
  }
task void dataTaskHumi () {
    if (call DataMsg.send(TOS_UART_ADDR,
sizeof(struct OscopeMsg),
&humimsg[currentHumiMsg]))

12. OscilloscopeSHT11 Lab

13. OscilloscopeSHT11 lab. 1 Starts cygwin. Move to following folder.
Compile - make zigbex
cd /opt/tinyos‐1.x/contrib/zigbex
cd OscilloscopeSHT11

14. OscilloscopeSHT11 lab. 2 ZigbeX Download
Run AVR studio at Windows
Tolol->auto connect-> browse main.hex located at
c:\Programfiles\UCB\cygwin\opt\tinyos‐1.x\contrib\zigbex\ OscilloscopeSHT11\build\zigbex

15. OscilloscopeSHT11 lab. 3 Java application
When it is configured correctly,
Move to /opt/tinyos‐1.x/tools/java in Cygwin
Type as follows
export
cd /opt/tinyos‐1.x/tools/java
java net.tinyos.oscope.oscilloscope

16. OscilloscopeSHT11 result

17. OscilloscopeSHT11 result
Show sensed temperature via oscilloscope!!!