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RS232 serial read - Printable Version

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+--- Thread: RS232 serial read (/showthread.php?tid=746)

RS232 serial read - leonidas - 20.04.2017

Hello,

I have a code which logs every char received be serial port:
Code:
if not port then
 require('serial')
 port = serial.open('/dev/RS232', { baudrate = 9600, parity = 'none', duplex = 'full' })
 port:flush()
end

-- port ready
if port then
  char = port:read(1, 1)
 if char then
   alert(char)
 end
end

What I need is to find specific string in received data. For example "OUT1ON" or "OUT1OFF" and based on it control KNX object. Maybe someone can help me with that?

RE: RS232 serial read - admin - 20.04.2017

Is this input separated somehow - by a new line character or similar?

RE: RS232 serial read - leonidas - 20.04.2017

In device manual it says  last byte is <cr>. "Module must end with carriage return (ASCII #13)"

RE: RS232 serial read - admin - 20.04.2017

Code:
if not port then
  require('serial')
  port = serial.open('/dev/RS232', { baudrate = 9600 })
  port:flush()
  line = ''
end

char = port:read(1, 1)
if char then
  if char == '\r' then
    line = line:trim()
    alert(line)
    line = ''
  else
    line = line .. char
  end
end


RE: RS232 serial read - leonidas - 20.04.2017

Thank you, it works

RE: RS232 serial read - Gadjoken - 16.03.2018

(20.04.2017, 12:10)admin Wrote:
Code:
if not port then
 require('serial')
 port = serial.open('/dev/RS232', { baudrate = 9600 })
 port:flush()
 line = ''
end

char = port:read(1, 1)
if char then
 if char == '\r' then
   line = line:trim()
   alert(line)
   line = ''
 else
   line = line .. char
 end
end
Hi Admin,
I have a question about RS232 i have try this profil with RS485 but i want (because i have many devices on RS485 and only this on Rs232) to put this device on RS232 with script but i don't now how make that : 

{
 "manufacturer": "TEST",
 "description": "TEST",
"mapping": [
{ "name": "1", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 0, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "2", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 0, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "3", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 1, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "4", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 1, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "5", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 2, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "6", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 2, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "7", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 3, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "8", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 3, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "9", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 4, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "10", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 4, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "11", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 5, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "12", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 5, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "13", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 6, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "14", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 6, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "15", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 7, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "16", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 7, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "17", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 8, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "18", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 8, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "19", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 9, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "20", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 9, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "21", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 10, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "22" "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 10, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "23", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 11, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "24", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 11, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "25", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 12, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "26", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 12, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "27", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 13, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "28", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 660, "value_bitmask": 0x00FF, "writable": 0},
{ "name": "29", "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 660, "value_bitmask": 0xFF00, "writable": 0},
{ "name": "30" "bus_datatype": "07", "type": "register", "datatype":"uint16", "address": 668, "value_bitmask": 0x00FF, "writable": 0}
 ]
}

Thanks a lot.

RE: RS232 serial read - admin - 16.03.2018

What kind of device is it? Is it ModBus RTU or ASCII over RS-232?

RE: RS232 serial read - Gadjoken - 19.03.2018

(16.03.2018, 17:17)admin Wrote: What kind of device is it? Is it ModBus RTU or ASCII over RS-232?

Hi admin,

I am attaching the product documentation. For me it is in RS232 ... 
Thank you for your understanding

RE: RS232 serial read - admin - 19.03.2018

Well, this should work with ModBus mapper and correct profile. You do not need any scripts here. Start with configuring correct RTU serial port and settings and then use RTU read test.

RE: RS232 serial read - Gadjoken - 19.03.2018

(19.03.2018, 07:36)admin Wrote: Well, this should work with ModBus mapper and correct profile. You do not need any scripts here. Start with configuring correct RTU serial port and settings and then use RTU read test.

Hi,
In fact that's what I thought too but after setting all parameters no discussion so the manufacturer told me that his machine was working in RS232 so that's why I wanted to do the test with a script.
Thank you.

RE: RS232 serial read - admin - 20.03.2018

It does not matter for ModBus mapper whether you are using RS-232 or RS-485. The only thing that matters is to set correct duplex if using selectable RS-232/RS-485 port on LM5.

RE: RS232 serial read - Gadjoken - 20.03.2018

(20.03.2018, 09:12)admin Wrote: It does not matter for ModBus mapper whether you are using RS-232 or RS-485. The only thing that matters is to set correct duplex if using selectable RS-232/RS-485 port on LM5.

Hello, 
I am currently on a SpaceLynk I have several devices RS485 (heat pump, central air treatment ...) that work very well without the equipment we are talking about. 
That's why I would have liked to put it following the request of the supplier on the RS232 port so it is necessary to pass on scripts? 
Thank you.