examples

A serial programming source code for linux

Example:

RadioShack CAT.II (CAT. NO. 22-805)
$ rs232 -b600 -p7n2 -s"\n" -r16
DC  2.989  V
$ rs232 -b600 -p7n2 -s"\n" -r16 --verbose
/dev/ttyS0 600 7N2 +dtr -rts -cts -dsr
send <crlf>
wait 0.500000 seconds
read 16 characters
DC  2.989   V
$

Gage Connections Inc. GageMux (PartNo: 100-20P)
$ rs232 -s "R01\r\p\R01\r" -r8 --verbose
/dev/ttyS0 9600 8n1 +dtr -rts -cts -dsr
send R01<lf><pause>
wait 0.500000 seconds
R01<lf>
wait 0.500000 seconds
read 8 characters
 -0.1750
$

MOVED DEVICE to a DIFFERENT SERIAL PORT
---------------------------------------
$ rs232 -d /dev/ttyS1 -s "R01\r\p\R01\r" -r8
 -0.1750
$

SENDING HEX VALUES
------------------
Notes:
1) \h toggles hex/ASCII mode, default = ASCII
2) notice the numbers in () are the hex values converted to decimal

$rs232 -d /dev/ttyS1 -s"\h52 30 31 OD\h\p\h52 30 31 OD" -r8 --verbose
/dev/ttyS1 9600 8n1 +dtr -rts -cts -dsr
send <hex>(82)(48)(49)(13)<ascii><pause>
wait 0.500000 seconds
<hex>(82)(48)(49)(13)
wait 0.500000 seconds
read 8 characters
 -0.1750
$

SPECIFYING WAIT TIME
--------------------
$rs232 -d /dev/ttyS1 -s"\h52 30 31 OD\h\p\h52 30 31 OD" -r8 --wait .65 --verbose
/dev/ttyS1 9600 8n1 +dtr -rts -cts -dsr
send <hex>(82)(48)(49)(13)<ascii><pause>
wait 0.650000 seconds
<hex>(82)(48)(49)(13)
wait 0.650000 seconds
read 8 characters
 -0.1750
$

SPECIFY DIFFERENT PAUSE TIME
----------------------------
Note: pause characters are set to wait value by default
$rs232 -d /dev/ttyS1 -s"\h52 30 31 OD\h\p\h52 30 31 OD" -r8\
> --wait .65 --pause .45 --verbose
/dev/ttyS1 9600 8n1 +dtr -rts -cts -dsr
send <hex>(82)(48)(49)(13)<ascii><pause>
wait 0.450000 seconds
<hex>(82)(48)(49)(13)
wait 0.650000 seconds
read 8 characters
 -0.1750
$

Liebert Environmental Communications Adapter (ECA2)
---------------------------------------------------

EXAMPLE of ASCII OUTPUT
-----------------------
rs232 -s"STA\r" -r200 -w4


 COOLING        GLYCOOL OFF

 HUM/DEHUM OFF

 TEMP READING                  72        F

 HUM  READING                  59

 % HEAT/COOL                   000

 STAGES HEAT/COOL              0

 DEGREES(F/C)                  F

 UNIT IS ON

 1>.z..@L..............@....p..
$

EXAMPLE of WRAPPING HEX + ASCII
-------------------------------
$ rs232 -s"STA\r" -r255 -w4 --hex+ --wrap 80
CR
 a 
    H  U  M  /  D  E  H  U  M     O  F  F CR
20 48 55 4d 2f 44 45 48 55 4d 20 4f 46 46  a 
CR
 a 
    T  E  M  P     R  E  A  D  I  N  G                                        
20 54 45 4d 50 20 52 45 41 44 49 4e 47 20 20 20 20 20 20 20 20 20 20 20 20 20 
                7  2                          F CR
20 20 20 20 20 37 32 20 20 20 20 20 20 20 20 46  a 
CR
 a 
    H  U  M        R  E  A  D  I  N  G                                        
20 48 55 4d 20 20 52 45 41 44 49 4e 47 20 20 20 20 20 20 20 20 20 20 20 20 20 
                5  9 CR
20 20 20 20 20 35 39  a 
CR
 a 
    %     H  E  A  T  /  C  O  O  L                                           
20 25 20 48 45 41 54 2f 43 4f 4f 4c 20 20 20 20 20 20 20 20 20 20 20 20 20 20 
                0  0  0 CR
20 20 20 20 20 30 30 30  a 
CR
 a 
    S  T  A  G  E  S     H  E  A  T  /  C  O  O  L                            
20 53 54 41 47 45 53 20 48 45 41 54 2f 43 4f 4f 4c 20 20 20 20 20 20 20 20 20 
                0 CR
20 20 20 20 20 30  a 
CR
 a 
    D  E  G  R  E  E  S  (  F  /  C  )                                        
20 44 45 47 52 45 45 53 28 46 2f 43 29 20 20 20 20 20 20 20 20 20 20 20 20 20 
                F CR
20 20 20 20 20 46  a 
CR
 a 
    U  N  I  T     I  S     O  N CR
20 55 4e 49 54 20 49 53 20 4f 4e  a 
CR
 a 
CR
 a 
CR
 a 
 1  >  .  z  .  .  @  L  .  .  .  .  .  .  .  .  .  .  .  .  .  .  @  .  .  .
31 3e bf 7a f2  4 40 4c f9 ff  0  2  0  0  0  0  0  0  0 cc f6  b 40  7  0  0 
 .  p  .  .  .
 0 70 89  4  8