如何在NodeMCU复位后立即自动启动Lua程序

Question

我想在NodeMCU内存上保存一个Lua程序。当NodeMCU在重置后启动并准备接收命令时，该脚本应该开始自动执行，而无需将NodeMCU附加到任何外部计算机(通过ESPlorer等)。我仍然可以通过ESPlorer终止执行。最好能举个好例子。

Answer 1

init.lua是你的朋友。请参阅https://nodemcu.readthedocs.io/en/latest/en/upload/#initlua上的完整文档。

-- load credentials, 'SSID' and 'PASSWORD' declared and initialize in there
dofile("credentials.lua")

function startup()
    if file.open("init.lua") == nil then
        print("init.lua deleted or renamed")
    else
        print("Running")
        file.close("init.lua")
        -- the actual application is stored in 'application.lua'
        -- dofile("application.lua")
    end
end

print("Connecting to WiFi access point...")
wifi.setmode(wifi.STATION)
wifi.sta.config(SSID, PASSWORD)
-- wifi.sta.connect() not necessary because config() uses auto-connect=true by default
tmr.alarm(1, 1000, 1, function()
    if wifi.sta.getip() == nil then
        print("Waiting for IP address...")
    else
        tmr.stop(1)
        print("WiFi connection established, IP address: " .. wifi.sta.getip())
        print("You have 3 seconds to abort")
        print("Waiting...")
        tmr.alarm(0, 3000, 0, startup)
    end
end)

更新

wifi.sta.config的当前语法如下：

station_cfg={}
station_cfg.ssid=SSID
station_cfg.pwd=PASSWORD
wifi.sta.config(station_cfg)