How to read from a serial port in lua

Question

I\'m new to lua and I\'m trying to receive data from the port, ttyACM0, I can write to the port by:

wserial = io.open(\"/dev/ttyACM0\",\"w\")
wserial:write(\         


        

Answer 1

I will not answer what you did wrong, but based one 1 answer here I did this for Windows environment:

-- You can generate PowerShell script at run-time
local script = [[
    $port= new-Object System.IO.Ports.SerialPort COM78,115200,None,8,one
    $port.open()
    $port.WriteLine('serialRequest')
    $port.ReadLine() > 'c:\\temp\\serialResponse.txt'
    $port.Close()
]]
-- Now create powershell process and feed your script to its stdin
local pipe = io.popen("powershell -command -", "w")
pipe:write(script)
pipe:close()

Not very nice as response must be taken from file, but it works.