lua-gpiod/gpiod_example.lua at main · HsOjo/lua-gpiod · GitHub

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#!/usr/bin/env lua

--[[

Complete gpiod Lua wrapper library usage example

Demonstrates how to use the generic gpiod library for GPIO operations

]]

-- Add current directory to package path

local gpiod = require("gpiod")

print("=== gpiod Lua Wrapper Library Example ===")

print("gpiod version:", gpiod.version())

-- Open GPIO chip

local chip = gpiod.chip_open("gpiochip4")

print("Chip name:", chip:name())

print("Chip label:", chip:label())

print("Number of GPIO lines:", chip:num_lines())

-- Get GPIO line (e.g., GPIO 18)

local line = chip:get_line(18)

print("GPIO line offset:", line:offset())

print("GPIO line name:", line:name() or "No name")

print("Is line used:", line:is_used())

-- Request output mode

line:request_output("example", 0)

print("GPIO direction:", line:direction())

print("Consumer:", line:consumer())

-- LED blinking example

print("Starting GPIO 18 blinking (5 times)...")

for i = 1, 5 do

print("Setting high level")

line:set_value(1)

gpiod.sleep(0.5)

print("Setting low level")

line:set_value(0)

gpiod.sleep(0.5)

end

-- Clean up resources

line:release()

chip:close()

print("Example completed")

lua-gpiod/gpiod_example.lua at main · HsOjo/lua-gpiod · GitHub

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