433 mhz modules

Comments

• Martin Hebel Posts: 1,239

  2006-09-30 19:33 edited 2006-09-30 19:33

  These are very simply devices to use, so I suspect there is something with electrical configuration. Reply back with a list of exactly how the device is connected, what pins are connected where.
  
  You are programming the TX code on on board, then switching to another board for RX and monitoring that one?
  
  -Martin
  
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  Martin Hebel
  Personal Links with plenty of BASIC Stamp info
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• bboy8012 Posts: 153

  2006-09-30 19:43 edited 2006-09-30 19:43

  yes sorry I have 2 boards, the serial homework board (transmit)with a BS2 wiring as follows:
  
  gnd, into last slot of Vss
  
  +5V into first slot of Vdd
  
  p8 into data pin of transmitter
  
  and a usb board of education (receive)with a BS2p wiring as follows:
  
  p0 470ohm resitor to an Led going to last slot of Vss
  
  p8 into data pin of receiver
  
  +5V into first slot of Vdd
  
  gnd into second to last slot of Vss
• Martin Hebel Posts: 1,239

  2006-09-30 19:53 edited 2006-09-30 19:53

  Well.... It seems everything is correct electrically, though I noticed the comments in one of them reference P7, though the code is set up for P8.
  
  With the BS2p you need to change the baud rate to 16624 since it runs at a different speed.
  
  You probably won't be able to get 9600 baud from these units, they cannot support that baud rate. I'd suggest going to the help files and use the values for SERIN and SEROUT for 1200 baud inverted
  Bs2: 17197
  Bs2p: 18447
  
  -Martin
  
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  Martin Hebel
  Personal Links with plenty of BASIC Stamp info
  StampPlot - Graphical Data Acquisition and Control
  AppBee - XBee ZigBee / IEEE 802.15.4 Adapters & Devices
• bboy8012 Posts: 153

  2006-09-30 21:09 edited 2006-09-30 21:09

  Thank you Martin, that was the problem the baud rate, I was going nuts trying to figure it out this whole week.
• jcferguson Posts: 86

  2006-09-30 21:34 edited 2006-09-30 21:34

  Hey Bboy,
  
  Was the problem that the value was incorrect for the BS2p or that the 9600 was too high on both? I have been getting 9600 to work with those units with no problems.
  
  Martin, what would it look like if they weren't performing at that speed? Lost data?
  
  Carlos
• Martin Hebel Posts: 1,239

  2006-09-30 22:02 edited 2006-09-30 22:02

  I may have been in error on the 9600. Seems to me whenever we used them we went at a lower baud rate, but I could have it confused with another means of communications, such as using the 38KHz IR units to send data.
  
  Sorry,
  Martin
  
  ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
  Martin Hebel
  Personal Links with plenty of BASIC Stamp info
  StampPlot - Graphical Data Acquisition and Control
  AppBee - XBee ZigBee / IEEE 802.15.4 Adapters & Devices
• bboy8012 Posts: 153

  2006-10-01 16:39 edited 2006-10-01 16:39

  Now that I am looking at it, I am transmitting·using 9600 baud, I think my whole problem was being new I didnt know what I was doing, and he guide me·to the right place to get it to work, and just tested 9600 and worked·wonderful·
  
  Post Edited (bboy8012) : 10/1/2006 4:45:33 PM GMT