DC-SS500 Temperature and Relative Humidity Sensor Module

Comments

• Franklin Posts: 4,747

  2010-03-04 01:34 edited 2010-03-04 01:34

  From the datasheet (which it would have been nice to include) it seems to talk serial but I didn't go into depth with the sheet.
  www.sure-electronics.net/download/DC-SS500_Ver1.0_EN.pdf
  
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  - Stephen
• mwpalmer Posts: 2

  2010-03-04 19:30 edited 2010-03-04 19:30

  Page 5 (adobe page 8) of the data sheet shows it to be 9600 8 n 1· with a sequence of "$sure COMMAD enter"·I know that pin 5 needs a high. Still no luck.
  
  I have attempted the serial connection and all it sends back is garbage. I have attempted the commands and settings in the data sheet as well all of the standard baud rates. Still no luck! Sorry about the data sheet, (slipped my mind)
  
  Thanks!
  
  Post Edited (mwpalmer) : 3/4/2010 7:36:18 PM GMT

  pdf

  pdf

  DC-SS500_Ver1.0_EN.pdf

  926K

  DC-SS500_Ver1.0_EN.pdf 925.9K
• Franklin Posts: 4,747

  2010-03-05 02:18 edited 2010-03-05 02:18

  It might help if you attached your code.
  
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  - Stephen
• RaKa Posts: 2

  2010-04-16 15:16 edited 2010-04-16 15:16

  Does anybody has an idea who to connect to the DC-SS500 with an Arduino board via SPI interface? Please help me, here are my collecting informations about the sensor: www.kramer-home.de/humidity-sensor-dc-ss500.html
  
  Until now, I got no data from the sensor ....
  
  
  Ralf Kramer
• Franklin Posts: 4,747

  2010-04-17 01:20 edited 2010-04-17 01:20

  Ralf, It looks like it talks regular SPI and arduino.cc has plenty of examples on how to talk to SPI. You connect /cs, sck, sdo and sdi to digital pins on the arduino and write code. Check out the arduino site.
  
  mwpalmer, It still might help if you attach your code.
  
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  - Stephen
  
  Post Edited (Franklin) : 4/17/2010 1:28:04 AM GMT
• RaKa Posts: 2

  2010-04-18 10:29 edited 2010-04-18 10:29

  Thanks Stephen, here is my code, it is my first SPI project! (On my Homepage you can find the code and a picture from the ozsiloscope
  
  

  // Testscript SPI interface for humidity & temeratur sensor DC-SS500 from Sure Electronic
  // (c) 4-2010 by Ralf Kramer, feel free to copy the code !
  //
  // ******* does not work yet !!! why ?  *****************
  
  #include "Spi.h"
  
  //# already defined in Spi.h !
  //#define SCK_PIN   13        to sensor PIN 9  (SCK)
  //#define MISO_PIN  12          to sensor PIN 10 (SDO)
  //#define MOSI_PIN  11          to sensor PIN 11 (SDI)
  //#define SS_PIN    10          to sensor PIN 5  (/CS)
  
  byte humidity;                        //byte to store the humidity
  
  void setup()
  {
    digitalWrite(SS_PIN, HIGH);          // disable sensor SPI
      
    //    Configure SPI Control Register (SPCR) (All values initially 0)
    //     Bit  Description
    //       7  SPI Interrupt Enable    -- disable  (SPIE --> 0)
    //       6  SPI Enable              -- enable   (SPE  --> 1)
    //       5  Data Order              -- MSB 1st  (DORD --> 0) (Slave specific)
    //       4  Master/Slave Select     -- master   (MSTR --> 1)
    //       3  Clock Polarity          --          (CPOL --> 1) (Slave specific) ("Mode")  Should be 1
    //       2  Clock Phase             --          (CPHA --> 0) (Slave specific)
    //       1  SPI Clock Rate Select 1 -- }        (SPR1 --> 1) 
    //       0  SPI Clock Rate Select 0 -- } fOSC/4 (SPR0 --> 1) (125kHz)
    // SPCR = (1<<SPE)| (1<<MSTR) | (1<< SPR0);
    
    SPCR = B01011011;                    // ?????  125kHz
    
    delay(200);                          // wait
  
    Spi.mode(SPCR);                      // C
  
    delay(300);                          // not sure if necessary
  
    Serial.begin(9600);                  // send to serial port
    Serial.println("Start ....");
    
    Serial.print("SPCR Mode  :");
    Serial.println(SPCR, BIN);
  }
  
  
  void loop()
  {
     digitalWrite(SS_PIN, LOW);            // Enable sensor SPI
     delayMicroseconds(10);               // not sure if necessary
  
     Spi.transfer(0xa0);                  // send command: get humidity
     delayMicroseconds(7);                // (all together wait 12 msec and read a byte)
     humidity = Spi.transfer(0x00);       // get one byte (don't care about opcode)
     digitalWrite(SS_PIN, HIGH);          // disable sensor SPI
     
     Serial.print("Humidity      :");     // write to console   
     Serial.print( humidity,   HEX) ;     // Humidity in HEX
     Serial.print(" - ");
     Serial.println( humidity, BIN);
   
     delay(1000);                         // wait a little bit
   
  }
  
  

  
  
  
  Thanks for your help, rk