[Question]use of readData() on lua interpreter

[kleffa]

local pin = readData([ESP201] P=4)
if pin == 1 then
print("[ESP201] P=4 V=0 ")
else
print("[ESP201] P=4 V=1 ")
end

I'm writing a couple of scripts like this one (just change state of flash on esp32cam). I know this can be just a digitalRead, but its about using readData() , this doesnt work, I missed something?
can readData used to read serial, like M27 data?

any help please to clarify it

[luc-github]

readData() read any string received by lua interpreter, from ESP3D if you send any [ESPXXX] command but also any string from serial or usb
use available() to check if any string is available then readData() to collect one string at once

here a sample script that echo any message received by lua interpreter

--[[
    Echo Serial

    This example echo serial outout to serial with echo: header 
    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"

    Be sure to have the following line comment out in the configure.h:
    #define ESP_LUA_INTERPRETER_FEATURE
    ]]--

-- Setup
local availableMsg = 0
local message = ""
while (true) do
    -- check if have data
    availableMsg = available()
    -- if any message
    if (availableMsg > 0) then
        message = "echo:" .. readData()
        print(message)
    end
    -- yield to other tasks
    yield()
end

I know documentation https://esp3d.io/ESP3D/Version_3.X/documentation/lua/ is very light but no one seems used this feature until now because I got no feedback on this feature, so feel free to propose, submit better documentation, of course I will help by answering any question or give clarifications if necessary

[luc-github]

@kleffa did this answered your question ?

[kleffa]

Yes, let me try some scripts and share as example El lun, 5 de may de 2025, 21:20, Luc ***@***.***> escribió:

…

*luc-github* left a comment (luc-github/ESP3D#1092) <#1092 (comment)> @kleffa <https://github.com/kleffa> did this answered your question ? — Reply to this email directly, view it on GitHub <#1092 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AGMYMBJZ6XNI4EGGQYE56ZD25AE4LAVCNFSM6AAAAAB4NYJAO6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDQNJSHEYTOMJQGY> . You are receiving this because you were mentioned.Message ID: ***@***.***>