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+--- Thread: Connector Bridge RS485 Interface (/showthread.php?tid=5450)
Connector Bridge RS485 Interface - TomasIha - 04.06.2024
Hello, I have a Connector Bridge RS485 Interface device. Can you send the script how to send such commands through modbus.
I am trying the common function:
function blind(command)
require('serial')
port = serial.open('/dev/RS485-1', { baudrate = 9600, parity = 'none', databits = 8, stopbits = 1 })
port:flush()
port:write(command)
port:close()
end
Example event script:
]
blind('!000V?;')
I am attaching the command of the device
Thank you
RE: Connector Bridge RS485 Interface - admin - 05.06.2024
Use this script to send a command and receive a reply from the bridge. Make sure that only a single script instance is running at any time. Serial port cannot be shared between multiple concurrent scripts.
Code:
require('serial')
port = serial.open('/dev/RS485-1', { baudrate = 9600 })
function readreply()
local line = {}
while true do
local char, err = port:read(1, 5)
if char == nil then
return nil, err
elseif char == ';' then
break
else
line[ #line + 1 ] = char
end
end
return table.concat(line)
end
command = '!000V?;'
port:write(command)
res, err = readreply()
log(res, err)