Code written for ESP32 in YouTube video https://youtu.be/b6W0ps3IhzA

init.lua

local rfidmod = nil

local function init_rfid()
    if rfidmod ~= nil then
        return
    end
    
    rfidmod = require('rfid32')({
        pin_sda  = 22,
        pin_clk  = 19,
        pin_miso = 25,
        pin_mosi = 23
    })
    .init()
    .scan({
        got_tag = function(tag, rfid)
            http.post(
                'http://192.168.0.104:1337/log',
                {}, 
                '{ "Tag": "' .. tag.hex() .. '" }',
                function(code, data)
                    print(code, data)
                end
            )
        end
    })
end

wifi.mode(wifi.STATION)

wifi.sta.config({
    ssid  = 'Renault 1.9D',
    pwd   = 'renault19',
    auto  = false
})

wifi.sta.on('got_ip', init_rfid)

wifi.start()
wifi.sta.connect()