Protokoll OK Lab Lua hacking August 2015 shackspace

Lua Workshop

Tools

• https://github.com/4refr0nt/luatool

• https://github.com/themadinventor/esptool

Image bauen

http://frightanic.com/nodemcu-custom-build/trigger-build.php

flashen

flashmodus: 4. Pin von unten (GP100) -> low

python esptool.py write_flash 0x00000 nodemcu-master-8-modules-2015-08-04-17-27-07-float.bin

git repos:

mkdir -p esp_tools/
pushd esp_tools/
git clone https://github.com/themadinventor/esptool
git clone https://github.com/4refr0nt/luatool
git clone https://github.com/nodemcu/nodemcu-firmware.git
popd

rumspielen

LED schalten

rote LED mit vorwiderstand (180Ohm) auf PIN 2 verbinden

an: gpio.write(2, gpio.HIGH)
aus: gpio.write(2, gpio.LOW)

photoresistor

werte sind allerdings seltsam !!

=adc.read(0)

an vcc angelegte spannung auslesen

=adc.readvdd33()

wifi

init.lua:

SSID      = "ssid"
PASSWORD  = "password"
TIMEOUT   = 10000000  -- 10 seconds

function connect(timeout)
   local time = tmr.now()
   wifi.sta.connect()

   tmr.alarm(1, 1000, 1, 
             function() 
                if wifi.sta.status() == 5 then 
                   tmr.stop(1)
                   print("Station: connected! IP: " .. wifi.sta.getip())
                   return true
                else
                   if tmr.now() - time > timeout then
                      tmr.stop(1)
                      print("Timeout!")
                      return false
                   end
                end 
             end
   )
end

print("Setting up Wi-Fi connection..")
wifi.setmode(wifi.STATION)
wifi.sta.config(SSID, PASSWORD)
connect(TIMEOUT)

• hochladen mit luatool: luatool.py -f init.lua

• mit screen /dev/ttyUSB0 verbinden.

• rebooten: node.restart()

• warten