- Thu Nov 26, 2020 4:13 am
#89565
you are probably using an old build or you are missing some module
that code section is requested for managing the led when the client is connected to the AP
you can comment it out if you don't need it
but there is another module (http) I'm gonna use in today code
so I recommend you using an updated build
this is what I'm using
Code: Select allNodeMCU 3.0.0.0 built on nodemcu-build.com provided by frightanic.com
branch: release
commit: 4f6792773f93f36a7255cfd28dca7aa6c4aa9552
release: 3.0-release_20201107
release DTS: 202011071523
SSL: false
build type: integer
LFS: 0x0 bytes total capacity
modules: file,gpio,http,net,node,tmr,uart,wifi
build 2020-11-25 12:40 powered by Lua 5.1.4 on SDK 3.0.1-dev(fce080e)
you can use
https://nodemcu-build.com/ to build it,
there is a section named "Select modules to include", just select the http module in addition to the standard ones (
thank you nodemcu/nodemcu-firmware guys!!!!!)
you will get the binaries in your mail in 24h
flash it at 0x00000
now for the AP, checkout the code below,
give it a try
then customize it where you find "YOUR CODE HERE"
init.lua
Code: Select all-- init.lua
print("Running")
file.close("init.lua")
dofile("wifi_ap.lua")
-- application will run after ap config
credentials.lua
Code: Select allSSID="NODEMCU-1"
PASSWORD="node123456"
SVR_NET="192.168.10."
-- example
-- SVR_NET="192.168.10."
-- will set server address to 192.168.10.1
-- and DHCP starting adresses from 192.168.10.10
SVR_PORT=80
wifi_ap.lua
Code: Select all-- wifi_ap.lua
file.close("wifi_ap.lua")
dofile("credentials.lua")
print("configuring AP ...")
wifi.setmode(wifi.SOFTAP)
cfgSoftAP = {}
cfgSoftAP.ssid = SSID
cfgSoftAP.pwd = PASSWORD
wifi.ap.config(cfgSoftAP)
cfgIP = {}
cfgIP.ip = (SVR_NET.."1")
cfgIP.netmask = "255.255.255.0"
wifi.ap.setip(cfgIP)
dhcp_config = {}
dhcp_config.start = (SVR_NET.."10")
wifi.ap.dhcp.config(dhcp_config)
print("AP configured")
dofile("httpserver.lua")
httpserver.lua
Code: Select all-- httpserver.lua
http_error = function(conn)
conn:send('HTTP/1.1 400 Bad Request\r\nContent-Type: application/json\r\nContent-Length: 81\r\nconnection: close\r\n\r\n{"error":"I\'m sorry, my responses are limited. You must ask the right question."}')
conn:on("sent", function(conn)
conn:close()
end)
end
http_ok = function(conn)
-- had to add extra \r\n cause HTTP module expects to always find body
conn:send('HTTP/1.1 200 OK\r\n\r\n\r\n')
conn:on("sent", function(conn)
conn:close()
end)
end
dofile("httroute.lua")
-- http server
srv = net.createServer(net.TCP)
print("starting the http server...")
srv:listen(SVR_PORT, function(conn)
conn:on("receive", function(conn, payload)
-- View the received data
print("PAYLOAD ######################\n")
print(payload)
print("##############################")
-- split header from content
found = {}
found = {string.find(payload, "\r\n\r\n")}
if next(found) == nil then
-- no content
http_route(conn, payload, nil)
else
header = string.sub(payload, 1, (found[1] - 1))
content = string.sub(payload, (found[2] + 1))
http_route(conn, header, content)
end
end)
end)
print("http server started")
httproute.lua
Code: Select all-- httproute.lua
gpio.mode(4, gpio.OUTPUT)
gpio.write(4, gpio.HIGH)
http_route = function(conn, header, content)
if string.match(header, "/led/turn/on") then
-- known command, send acknowledge
http_ok(conn)
print("will turn the led on")
-- turn on led
-- YOUR CODE HERE
gpio.write(4, gpio.LOW)
elseif string.match(header, "/led/turn/off") then
-- known command, send acknowledge
http_ok(conn)
print("will turn the led off")
-- turn off led
-- YOUR CODE HERE
gpio.write(4, gpio.HIGH)
else
-- unknown command, send error
http_error(conn)
print("don't understand the command")
end
end
and finally replace the following files into the client esp device
now the client will send a message to the ap (every 10 seconds)
for turning on/off the esp8266 led on D4 (the blue one)
enjoy and customize it for your purposes
credentials.lua
Code: Select allSSID="NODEMCU-1"
PASSWORD="node123456"
application.lua
Code: Select all-- application.lua
button_pressed = false
last_communicated_button_status = false
cmd_led_on = "http://192.168.10.1/led/turn/on"
periodic_task = function()
-- custom application ...
-- YOUR CODE HERE
-- example begin
if connected_to_AP and (button_pressed ~= last_commnicated_button_status) then
if button_pressed then
button_pressed = false
print("sending command for turning led off")
cmd = "http://192.168.10.1/led/turn/off"
else
button_pressed = true
print("sending command for turning led on")
cmd = "http://192.168.10.1/led/turn/on"
end
http.post(cmd, nil, nil, function(code, data)
if (code < 0) then
print("HTTP error, cannot communicate with AP")
last_communicated_button_status = not(button_pressed)
else
print(code, data)
last_communicated_button_status = button_pressed
end
end)
end
-- example end
print("connected to AP " .. tostring(connected_to_AP))
tmr.create():alarm(10000, tmr.ALARM_SINGLE, periodic_task)
end
print("now running the application")
print("connected to AP " .. tostring(connected_to_AP))
tmr.create():alarm(10000, tmr.ALARM_SINGLE, periodic_task)
https://github.com/quackmore
