DIO
dio
allows to work with digital input/output ports on the Gateway. For a list of supported devices and configuration instructions, visit the Enapter Gateway DIO Config.
note
DIO is available since Gateway version 2.2.
dio.input()
-- @param port integer device input port
-- @return integer, string signal level and error string
function dio.input(port)
end
Get signal level
for specified port
. When operation fails, error
will contain a non-nil string. If operation succeeds error
will be nil.
Example
local level, error = dio.input(3)
if error then
enapter.log('get input level: '..error, 'error')
else
enapter.log('level: '..tostring(level))
end
dio.output()
-- @param port integer device output port
-- @param level integer signal level
-- @return string error
function dio.output(port, level)
end
Set signal level
for specified port
. When operation fails, error
will contain a non-nil string. If operation succeeds error
will be nil.
Example
local error = dio.output(3, dio.HIGH)
if error then
enapter.log('set output level: '..error, 'error')
end
Signal Level
DIO module supports next signal levels:
dio.HIGH
equivalent 1,dio.LOW
equivalent 0.