Basic Stamp serial connection Raspberry Pi

Comments

• Moi Posts: 5

  2014-02-25 17:03 edited 2014-02-25 17:03

  Problem solved
• Buck Rogers Posts: 2,200

  2014-02-25 17:24 edited 2014-02-25 17:24

  Moi wrote: »

  Problem solved

  
  Hello!
  What was the problem and how did you solve it?
• Buck Rogers Posts: 2,200

  2014-03-06 21:10 edited 2014-03-06 21:10

  Moi wrote: »

  Problem solved

  
  The problem as you've described it isn't solved since you didn't change the settings from "unsolved" to "solved". So what was the solution?
• Moi Posts: 5

  2014-03-07 07:45 edited 2014-03-07 07:45

  The first problem was that the command SERIN monitors the incoming serial data until is find a non-decimal numeric character. The second problem was that I didn't know what was the Python program sending. Both problems are solved changing the Python code by that other:

  import serial
  
  ser=serial.Serial(port='/dev/ttyUSB2', baudrate=9600, bytesize=8, parity=''N', stopbits=1, timeout=None)
  print("Starting!")
  while True:
        val=raw_input('Value: ')
        if val == '1':
            print('LED ON')
            ser.write('1/n')
        elif val =='2':
            print('LED OFF')
            ser.write('2/n')
        elif val=='exit':
             ser.close()
             exit()
  ser.close()
  

  
  Best regards,
  Mois
• satriaoo Posts: 20

  2015-01-18 22:38 edited 2015-01-18 22:38

  Moi wrote: »

  The first problem was that the command SERIN monitors the incoming serial data until is find a non-decimal numeric character. The second problem was that I didn't know what was the Python program sending. Both problems are solved changing the Python code by that other:

  import serial
  
  ser=serial.Serial(port='/dev/ttyUSB2', baudrate=9600, bytesize=8, parity=''N', stopbits=1, timeout=None)
  print("Starting!")
  while True:
        val=raw_input('Value: ')
        if val == '1':
            print('LED ON')
            ser.write('1/n')
        elif val =='2':
            print('LED OFF')
            ser.write('2/n')
        elif val=='exit':
             ser.close()
             exit()
  ser.close()
  

  
  Best regards,
  Mois
• Moi Posts: 5

  2015-01-19 01:12 edited 2015-01-19 01:12

  I've been reading your post and they are right, there is an extra quote on parity

  ser=serial.Serial(port='/dev/ttyUSB2', baudrate=9600, bytesize=8, parity=''N', stopbits=1, timeout=None)
  

  
  and it should be:

  ser=serial.Serial(port='/dev/ttyUSB2', baudrate=9600, bytesize=8, parity='N', stopbits=1, timeout=None)
  

  
  You have to know which port is the BS attached to the RPi, the first time you plug it usually would be '/dev/ttyUSB0' but if you unplug it and plug it again it may have changed so you can type dmesg in the command line to see in which ttyUSB is connected the BS and edit that parameter.
  
  Although isn't the main problem it's true that in the write lines should be "1\n" and "2\n".
  
  So the final Python code is:

  import serial
  
  ser=serial.Serial(port='/dev/ttyUSB0', baudrate=9600, bytesize=8, parity='N', stopbits=1, timeout=None)
  print("Starting!")
  while True:
        val=raw_input('Value: ')
        if val == '1':
            print('LED ON')
            ser.write('1\n')
        elif val =='2':
            print('LED OFF')
            ser.write('2\n')
        elif val=='exit':
             ser.close()
             exit()
  ser.close()
  

  
  Finally I've seen you have changed the SerialPin from 16 to 15, I've used 16 because if Rpin is set to 16, the BASIC Stamp uses the dedicated serial-input pin (SIN, physical pin 2), which is normally used by the Stamp Editor during the download process.
  
  I let you the code you have on the other post with little modifications, I think this should work:
  

  '{$STAMP BS2}
  '{$PBASIC 2.5}
  
  ' I/O Declaration (Added)
  LedPin PIN 15 ' Added
  SerialPin PIN 16 ' Changed from CON to PIN and changed from 15 to 16
  
  ' Constant Declaration (Added)
  Baud CON 84 ' 9600 Baud, 8-Bit, No-Parity, True (non-inverted)
  LoopDelay CON 1000 ' Added
  
  ' Variable Declaration (Added)
  state VAR Byte
  
  
  HIGH LedPin ' Changed from 9 to LedPin
  PAUSE 200
  LOW  LedPin ' Changed from 9 to LedPin
  
  
  DO ' Changed from Main: to DO
    SERIN SerialPin, Baud, [DEC1 state] ' Added formatter DEC1 
  
    IF state = 1  THEN
      HIGH LedPin ' Changed from 9 to LedPin
    ELSEIF state = 2  THEN
      LOW LedPin ' Changed from 9 to LedPin
    ENDIF
  
    PAUSE LoopDelay
  LOOP ' Changed from Goto Main to LOOP
  

  
  Unfortunately I no longer have the BS so I can't try it by myself.
  
  Here you have a little video I made when I was starting this project: http://youtu.be/4zM54iNZajs
  
  Best regards,
  Mois
• Moi Posts: 5

  2016-09-02 21:05

  And the video when I finished the project:
  
• Publison Posts: 12,366

  2016-09-02 22:35 edited 2016-09-02 22:36

  It's been a while!
  Congratulation on the project! Looks great.