--[[

Detect push button

This example detects a push button connected to pin 4 and sends the command

to the printer screen when the button is pressed.

The push button is connected to pin 4 and the LOW value is when the button

is pressed.

Put this script in the ESP3D flash file system and call it from the init script in

configuration.h.

#define ESP_AUTOSTART_SCRIPT "[ESP300]/FS/detectpush.lua"

You can also start it manually from the serial monitor by typing:

[ESP300]/FS/detectpush.lua

Be sure to have the following line comment out in the configure.h:

#define ESP_LUA_INTERPRETER_FEATURE

]]--

-- Setup

-- pin 0 is connected to the push button

local pin = 0

-- LOW is the value when the button is pressed

local trigger_value = LOW

-- send ESP3D command to display current IP address to the printer screen

local command = "[ESP212]IP:%ESP_IP%\n"

-- variable to read the pin value

local pinval

local lastpush = millis()

-- define the pin mode

pinMode(pin, INPUT_PULLUP)

-- Main loop

while (true) do

-- read the pin value

pinval = digitalRead(pin)

-- if the pin value is `trigger_value` then send the command

if (pinval == trigger_value) then

-- do not overflow the system so only send command if at least 1 second elapsed since last one

if ((millis()-lastpush) > 1000) then

lastpush = millis()

-- send the command to the esp3d

print(command)

end

end

-- yield to other tasks

yield()

end