RF Temp Transmission

Comments

• Mike Green Posts: 23,101

  2007-02-22 01:27 edited 2007-02-22 01:27

  Most data transmission is just a sequence of on/off transmission. What kind of transmitter/receiver are you using and how are you controlling them? Assuming you have a pin that controls transmission and the receiver on the other end puts out a HIGH/LOW signal, you would simply use SERIN and SEROUT at some low speed (2400 Baud is probably low enough) to control the transmitter/ decode the receiver. Once you have serial communication working, you can send decimal numbers with SEROUT and decode them with SERIN using the DEC formatters.
• Lowtide Posts: 12

  2007-02-22 02:19 edited 2007-02-22 02:19

  Mike, I am using the Linx RF module transmitter/receiver and the Sensirion SHT11 sensor module. I'm just not getting the debug, so I can view the temperature.
  The transmit:
  PULSOUT 8, 30000
  PAUSE 1
  SEROUT 8, 16624, [noparse][[/noparse] "!&"]
  The Receive:
  DEBUG "Raw Data Temp: "
  SERIN 7, 16468, [noparse][[/noparse]WAIT("!&")]
  DEBUG DEC soT, ClrRt, CR
  tF=soT**11796-400
  DEBUG DEC (tF/10),".",DEC1 tF,degsym,clrRt,CR
  DEBUG CLS
  
  Any ideas?
• Martin Hebel Posts: 1,239

  2007-02-22 02:29 edited 2007-02-22 02:29

  I see 2 different Baud rates between TX & RX. Why? Different Stamps?
  
  Also, you neither send nor recieve any actual data:
  SEROUT 8 , 16624,[noparse][[/noparse]"!&", DEC temp,CR]
  
  SERIN 7, 16468, [noparse][[/noparse]WAIT("!&"), DEC temp]
  
  -Martin
  
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  StampPlot - GUI and Plotting, and XBee Wireless Adapters
  Southern Illinois University Carbondale, Electronic Systems Technologies
• Lowtide Posts: 12

  2007-02-22 02:52 edited 2007-02-22 02:52

  I am using 2 different stamps
• Lowtide Posts: 12

  2007-02-22 03:07 edited 2007-02-22 03:07

  I'm sorry guys, I am trying to understand this, but I am not getting a valid temp.
  
  DEBUG "Raw Data Temp: "
  SERIN 7, 16468, [noparse][[/noparse]WAIT(temp), DEC temp]
  DEBUG DEC (tF/10),".",DEC1 tF,degsym,clrRt,CR
  tF=soT**11796-400
  DEBUG DEC soT, ClrRt, CR
  
  DEBUG MoveTo, 0, 3
  DEBUG "Raw Data Temp: "
  DEBUG DEC soT, ClrRt, CR
  tF=soT**11796-400
  DEBUG DEC (tF/10),".",DEC1 tF,degsym,clrRt,CR
  SEROUT 8 , 16624,[noparse][[/noparse]"!&", DEC temp,CR]
  PULSOUT 8, 30000
• Franklin Posts: 4,747

  2007-02-22 03:30 edited 2007-02-22 03:30

  SERIN 7, 16468, [noparse][[/noparse]WAIT(temp), DEC temp]
  DEBUG DEC (tF/10),".",DEC1 tF,degsym,clrRt,CR
  tF=soT**11796-400
  DEBUG DEC soT, ClrRt, CR
  
  

  
  So, where do you do anything with your serin input (if there actually is any)
  
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  - Stephen
• Lowtide Posts: 12

  2007-02-22 03:44 edited 2007-02-22 03:44

  i am trying to display it as a debug
• Martin Hebel Posts: 1,239

  2007-02-22 04:17 edited 2007-02-22 04:17

  Ok, my fault there, with my example I used the variable 'temp' as in illustration.· You need to use your own actual variables.
  
  -Martin
• Bruce Bates Posts: 3,045

  2007-02-22 08:24 edited 2007-02-22 08:24

  Lowtide -
  
  It would be nice to see the whole program, including the definitions of the variables. I suspect you'll need to send the data as bytes, and not as words. The way you dothat is as follows:
  
  SEROUT OutPin, Baud, [noparse][[/noparse]temp.highbyte, temp.lowbyte]
  
  - - - -
  
  BTW, thie following line of code doesn't make a lot of sense to me. What were you trying to do?
  
  <!--StartFragment -->SERIN 7, 16468, [noparse][[/noparse]WAIT(temp), DEC temp]
  
  You're waiting on a data string which doesn't yet exist????
  
  Regards,
  
  Bruce Bates
  
  Post Edited (Bruce Bates) : 2/22/2007 8:29:55 AM GMT