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Ligne 38 : − + − | align="center" style="background:#f0f0f0;"|'''Pin Notes''' − + − |-+ − | + − + − + − + − | ||+ − |-+ − | + − |-+ − + − + − + − |-+ − + − + − | ||+ − |-+ − | + − |-+ − + − + − | ||+ − + − | + − |-+ − + − |-+ − | ||+ − |-+ − + − + − + − + − | ||+ − + − | + − |-+ − | 4+ − |-+ − + − |-+ − | + − + − + − + − | ||+ − + − | + − |-+ − + − |- − | || − − | − |- − − − | || − − | − |- − − − − |- − | − |- − − − | || − − | − |- − − |- − | || − |- − − − − − | || − |- − − − | 11 − |- − − − | − |- − − − | || − − | − |- − − − − |- − | − |- − − − | || − |- − − − | 6 − |- − − − | − |- − − − | || − |- − − − | 7 − |- − − |- − | − − − − | || − − | − |- − − − − |- − | − |- − − − | || − − | − |- − − |- − | || − |- − − − − − | || − |- − | − |- − + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
→Hello World
{{ambox|text=The Lua documentation for the ESP8266 has GPIO #4 and #5 swapped so if #4/#5 aren't working for you, try swapping!}}
{{ambox|text=The Lua documentation for the ESP8266 has GPIO #4 and #5 swapped so if #4/#5 aren't working for you, try swapping!}}
{| {{table}}
{| class="wikitable" border="1"
|-
|-
| ||
| align="center" | Pin Notes
| align="center" | PCB/Arduino
| align="center" | NodeMCU/Lua
|-
|- style="font-size: 90%"
| PCB/Arduino
| align="left" | Pas de pullup!
|-
| align="left" | 0
| align="left" | 3
|- style="font-size: 90%"
| align="left" |
| align="left" | 2
| NodeMCU/Lua
| align="left" | 4
|-
|- style="font-size: 90%"
|
| align="left" |
| align="left" | 3
| No pullups!
| align="left" | 9
|-
|- style="font-size: 90%"
| align="left" |
| align="left" | 4
| align="left" | 1
|- style="font-size: 90%"
| 0
| align="left" |
|-
| align="left" | 5
| align="left" | 2
|-
|- style="font-size: 90%"
| align="left" |
| align="left" | 9
| 3
| align="left" | 11
|- style="font-size: 90%"
| align="left" |
| align="left" | 10
|
| align="left" | 12
|-
|- style="font-size: 90%"
| 2
| align="left" |
|-
| align="left" | 12
| align="left" | 6
|-
|- style="font-size: 90%"
| align="left" |
| align="left" | 13
| align="left" | 7
|- style="font-size: 90%"
| ||
| align="left" |
| align="left" | 14
| align="left" | 5
|-
|- style="font-size: 90%"
| 3
| align="left" |
|-
| align="left" | 15
| align="left" | 8
|-
|- style="font-size: 90%"
| align="left" |
| align="left" | 16
| 9
| align="left" | 0
|-
| 4
|-
|-
| 1
|-
| ||
| 5
|-
|-
| 2
|
|-
| 9
|-
|
|-
| ||
|-
| 10
|-
|-
| 12
|-
| ||
| 12
|-
|
|-
| ||
|-
| 13
|-
|
|-
| ||
|-
| 14
|-
|-
| 5
|-
| ||
| 15
|-
|-
| 8
|
|-
| 16
|-
| 0
|}
|}
So to set the pin #0 LED on and off (which would be pin #3 in Lua) first make it an output:
<nowiki>gpio.mode(3, gpio.OUTPUT)</nowiki>
Turn the LED on with:
<nowiki>gpio.write(3, gpio.LOW)</nowiki>
Et eteindre la LED:
<nowiki>gpio.write(3, gpio.HIGH)</nowiki>
You can make this a little more automated by running:
<nowiki>while 1 do
gpio.write(3, gpio.HIGH)
tmr.delay(1000000) -- wait 1,000,000 us = 1 second
gpio.write(3, gpio.LOW)
tmr.delay(1000000) -- wait 1,000,000 us = 1 second
end</nowiki>
The LED will now be blinking on and off.
Note that since its in a loop, its not possible to get it to stop via the interpretter. To stop it, click the '''Reset''' button again!
== Scanner le réseau WiFi et connexion ==
We'll continue with a quick demo of scanning for WiFi and connecting.
Once you're back at the Lua prompt, set the ESP8266 into WiFi Client mode with
<nowiki>wifi.setmode(wifi.STATION)</nowiki>
Then you can run the scanner and have it print out the available AP's
<nowiki>-- print ap list
function listap(t)
for k,v in pairs(t) do
print(k.." : "..v)
end
end
wifi.sta.getap(listap)</nowiki>
or for more detail...
<nowiki>-- print ap list
function listap(t)
for ssid,v in pairs(t) do
authmode, rssi, bssid, channel = string.match(v, "(%d),(-?%d+),(%x%x:%x%x:%x%x:%x%x:%x%x:%x%x),(%d+)")
print(ssid,authmode,rssi,bssid,channel)
end
end
wifi.sta.getap(listap)</nowiki>
We can connect to the access point with '''wifi.sta.config''' and '''wifi.sta.connect''' - it will take a second or two to complete the connection, you can query the module to ask the status with '''wifi.sta.status()''' - when you get a 5 it means the connection is completed and DHCP successful
<nowiki>wifi.sta.config("accesspointname","yourpassword")
wifi.sta.connect()
tmr.delay(1000000) -- wait 1,000,000 us = 1 second
print(wifi.sta.status())
print(wifi.sta.getip())</nowiki>
== Exemple WebClient ==
Once you're got the IP address you can connect to adafruit, for example, and read a webpage and print it out:
<nowiki>sk=net.createConnection(net.TCP, 0)
sk:on("receive", function(sck, c) print(c) end )
sk:connect(80,"207.58.139.247")
sk:send("GET /testwifi/index.html HTTP/1.1\r\nHost: www.adafruit.com\r\nConnection: keep-alive\r\nAccept: */*\r\n\r\n")
</nowiki>
You can also have the module do DNS for you, just give it the hostname instead of IP address:
<nowiki>sk=net.createConnection(net.TCP, 0)
sk:on("receive", function(sck, c) print(c) end )
sk:connect(80,"www.adafruit.com")
sk:send("GET /testwifi/index.html HTTP/1.1\r\nHost: www.adafruit.com\r\nConnection: keep-alive\r\nAccept: */*\r\n\r\n")</nowiki>
This is just a light overview of testing out your HUZZAH ESP breakout! For much more, check out NodeMCU's tutorial page [https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_en https://github.com/nodemcu/nodemcu-firmware/wiki/nodemcu_api_en] for the details on what functions are available to you, as well as [http://www.lua.org/ http://www.lua.org] to learn more about the Lua scripting language
{{FEATHER-ESP8266-TRAILER}}
{{FEATHER-ESP8266-TRAILER}}