LUA Reference Guide
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io Library
The io library has been simplified and only a subset of functions and their functionality is available. What follows is a complete reference of io functions that are available to EdgeTX scripts
Available functions:
- io.open()
- io.close()
- io.read()
- io.write()
- io.seek()
Examples
Read the whole file
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-- this is a stand-alone script
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​
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local function run(event)
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print("lua io.read test") -- print() statements are visible in Debug output window
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local f = io.open("foo.bar", "r")
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while true do
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local data = io.read(f, 10) -- read up to 10 characters (newline char also counts!)
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if #data == 0 then break end -- we get zero length string back when we reach end of the file
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print("data: "..data)
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end
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io.close(f)
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return 1
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end
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​
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return { run=run }
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Append data to file
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-- this is a stand-alone script
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​
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local function run(event)
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print("lua io.write test")
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local f = io.open("foo.bar", "a") -- open file in append mode
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io.write(f, "first line\r\nsecond line\r\n")
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io.write(f, 4, "\r\n", 35.6778, "\r\n") -- one can write multiple items at the same time
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local foo = -4.45
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io.write(f, foo, "\r\n")
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io.close(f)
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return 1 -- this will end the script execution
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end
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​
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return { run=run }
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Last modified 2mo ago
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