WiFi Module¶

Since	Origin / Contributor	Maintainer	Source
2015-05-12	Zeroday	dnc40085	wifi.c

The NodeMCU WiFi control is spread across several tables:

wifi for overall WiFi configuration
wifi.sta for station mode functions
wifi.ap for wireless access point (WAP or simply AP) functions
wifi.ap.dhcp for DHCP server control
wifi.eventmon for wifi event monitor

wifi.getchannel()¶

Gets the current WiFi channel.

Syntax¶

wifi.getchannel()

Parameters¶

nil

Returns¶

current WiFi channel

wifi.getdefaultmode()¶

Gets default WiFi operation mode.

Syntax¶

wifi.getdefaultmode()

Parameters¶

nil

Returns¶

The WiFi mode, as one of the wifi.STATION, wifi.SOFTAP, wifi.STATIONAP or wifi.NULLMODE constants.

wifi.getmode()¶

Gets WiFi operation mode.

Syntax¶

wifi.getmode()

Parameters¶

nil

Returns¶

The WiFi mode, as one of the wifi.STATION, wifi.SOFTAP, wifi.STATIONAP or wifi.NULLMODE constants.

wifi.getphymode()¶

Gets WiFi physical mode.

Syntax¶

wifi.getphymode()

Parameters¶

none

Returns¶

The current physical mode as one of wifi.PHYMODE_B, wifi.PHYMODE_G or wifi.PHYMODE_N.

wifi.setmode()¶

Configures the WiFi mode to use. NodeMCU can run in one of four WiFi modes:

Station mode, where the NodeMCU device joins an existing network
Access point (AP) mode, where it creates its own network that others can join
Station + AP mode, where it both creates its own network while at the same time being joined to another existing network
WiFi off

When using the combined Station + AP mode, the same channel will be used for both networks as the radio can only listen on a single channel.

NOTE: WiFi Mode configuration will be retained until changed even if device is turned off.

Syntax¶

wifi.setmode(mode[, save])

Parameters¶

mode value should be one of
wifi.STATION for when the device is connected to a WiFi router. This is often done to give the device access to the Internet.
wifi.SOFTAP for when the device is acting only as an access point. This will allow you to see the device in the list of WiFi networks (unless you hide the SSID, of course). In this mode your computer can connect to the device, creating a local area network. Unless you change the value, the NodeMCU device will be given a local IP address of 192.168.4.1 and assign your computer the next available IP address, such as 192.168.4.2.
wifi.STATIONAP is the combination of wifi.STATION and wifi.SOFTAP. It allows you to create a local WiFi connection and connect to another WiFi router.
wifi.NULLMODE changing WiFi mode to NULL_MODE will put wifi into a low power state similar to MODEM_SLEEP, provided wifi.nullmodesleep(false) has not been called.
save choose whether or not to save wifi mode to flash
true WiFi mode configuration will be retained through power cycle. (Default)
false WiFi mode configuration will not be retained through power cycle.

Returns¶

current mode after setup

Example¶

wifi.setmode(wifi.STATION)

wifi.setphymode()¶

Sets WiFi physical mode.

wifi.PHYMODE_B 802.11b, more range, low Transfer rate, more current draw
wifi.PHYMODE_G 802.11g, medium range, medium transfer rate, medium current draw
wifi.PHYMODE_N 802.11n, least range, fast transfer rate, least current draw (STATION ONLY) Information from the Espressif datasheet v4.3

Parameters	Typical Power Usage
Tx 802.11b, CCK 11Mbps, P OUT=+17dBm	170 mA
Tx 802.11g, OFDM 54Mbps, P OUT =+15dBm	140 mA
Tx 802.11n, MCS7 65Mbps, P OUT =+13dBm	120 mA
Rx 802.11b, 1024 bytes packet length, -80dBm	50 mA
Rx 802.11g, 1024 bytes packet length, -70dBm	56 mA
Rx 802.11n, 1024 bytes packet length, -65dBm	56 mA

Syntax¶

wifi.setphymode(mode)

Parameters¶

mode one of the following

wifi.PHYMODE_B
wifi.PHYMODE_G
wifi.PHYMODE_N

Returns¶

physical mode after setup

wifi.nullmodesleep()¶

Configures whether or not WiFi automatically goes to sleep in NULL_MODE. Enabled by default.

!!! note
    This function **does not** store it's setting in flash, if auto sleep in NULL_MODE is not desired, `wifi.nullmodesleep(false)` must be called after powerup, restart, or wake from deep sleep.

Syntax¶

wifi.nullmodesleep([enable])

Parameters¶

enable
true Enable WiFi auto sleep in NULL_MODE. (Default setting)
false Disable WiFi auto sleep in NULL_MODE.

Returns¶

sleep_enabled Current/New NULL_MODE sleep setting
If wifi.nullmodesleep() is called with no arguments, current setting is returned.
If wifi.nullmodesleep() is called with enable argument, confirmation of new setting is returned.

wifi.startsmart()¶

Starts to auto configuration, if success set up SSID and password automatically.

Intended for use with SmartConfig apps, such as Espressif's Android & iOS app.

Only usable in wifi.STATION mode.

Important

SmartConfig is disabled by default and can be enabled by setting WIFI_SMART_ENABLE in user_config.h before you build the firmware.

Syntax¶

wifi.startsmart(type, callback)

Parameters¶

type 0 for ESP_TOUCH, or 1 for AIR_KISS.
callback a callback function of the form function(ssid, password) end which gets called after configuration.

Returns¶

nil

Example¶

wifi.setmode(wifi.STATION)
wifi.startsmart(0,
    function(ssid, password)
        print(string.format("Success. SSID:%s ; PASSWORD:%s", ssid, password))
    end
)

wifi.stopsmart()¶

Stops the smart configuring process.

Syntax¶

wifi.stopsmart()

Parameters¶

none

Returns¶

nil

wifi.sta Module¶

wifi.sta.autoconnect()¶

Auto connects to AP in station mode.

Syntax¶

wifi.sta.autoconnect(auto)

Parameters¶

auto 0 to disable auto connecting, 1 to enable auto connecting

Returns¶

nil

Example¶

wifi.sta.autoconnect(1)

wifi.sta.changeap()¶

Select Access Point from list returned by wifi.sta.getapinfo()

Syntax¶

wifi.sta.changeap(ap_index)

Parameters¶

ap_index Index of Access Point you would like to change to. (Range:1-5) - Corresponds to index used by wifi.sta.getapinfo() and wifi.sta.getapindex()

Returns¶

true Success
false Failure

Example¶

wifi.sta.changeap(4)

wifi.sta.config()¶

Sets the WiFi station configuration.

Syntax¶

wifi.sta.config(station_config)

Parameters¶

station_config table containing configuration data for station
ssid string which is less than 32 bytes.
pwd string which is 8-64 or 0 bytes. Empty string indicates an open WiFi access point.
auto defaults to true
- true to enable auto connect and connect to access point, hence with auto=true there's no need to call wifi.sta.connect()
- false to disable auto connect and remain disconnected from access point
bssid string that contains the MAC address of the access point (optional)
- You can set BSSID if you have multiple access points with the same SSID.
- Note: if you set BSSID for a specific SSID and would like to configure station to connect to the same SSID only without the BSSID requirement, you MUST first configure to station to a different SSID first, then connect to the desired SSID
- The following formats are valid:
  - "DE:C1:A5:51:F1:ED"
  - "AC-1D-1C-B1-0B-22"
  - "DE AD BE EF 7A C0"
save Save station configuration to flash.
true configuration will be retained through power cycle.
false configuration will not be retained through power cycle. (Default)

Returns¶

true Success
false Failure

Example¶

--connect to Access Point (DO NOT save config to flash)
station_cfg={}
station_cfg.ssid="NODE-AABBCC"
station_cfg.pwd="password"
wifi.sta.config(station_cfg)

--connect to Access Point (DO save config to flash)
station_cfg={}
station_cfg.ssid="NODE-AABBCC"
station_cfg.pwd="password"
station_cfg.save=true
wifi.sta.config(station_cfg)

--connect to Access Point with specific MAC address  
station_cfg={}
station_cfg.ssid="NODE-AABBCC"
station_cfg.pwd="password"
station_cfg.bssid="AA:BB:CC:DD:EE:FF"
wifi.sta.config(station_cfg)

--configure station but don't connect to Access point
station_cfg={}
station_cfg.ssid="NODE-AABBCC"
station_cfg.pwd="password"
station_cfg.auto=false
wifi.sta.config(station_cfg)

wifi.sta.connect()¶

Connects to the configured AP in station mode. You only ever need to call this if auto-connect was disabled in wifi.sta.config().

Syntax¶

wifi.sta.connect()

Parameters¶

none

Returns¶

nil

wifi.sta.disconnect()¶

Disconnects from AP in station mode.

!!! note
    Please note that disconnecting from Access Point does not reduce power consumption.
    If power saving is your goal, please refer to the description for `wifi.NULLMODE` in the function [`wifi.setmode()`](#wifisetmode) for more details.

Syntax¶

wifi.sta.disconnect()

Parameters¶

none

Returns¶

nil

wifi.sta.eventMonReg()¶

Registers callbacks for WiFi station status events.

Syntax¶

wifi.sta.eventMonReg(wifi_status[, function([previous_state])])

Parameters¶

wifi_status WiFi status you would like to set a callback for:
- wifi.STA_IDLE
- wifi.STA_CONNECTING
- wifi.STA_WRONGPWD
- wifi.STA_APNOTFOUND
- wifi.STA_FAIL
- wifi.STA_GOTIP
function callback function to perform when event occurs
- Note: leaving field blank unregisters callback.
previous_state previous wifi_state(0 - 5)

Returns¶

nil

Example¶

--register callback
wifi.sta.eventMonReg(wifi.STA_IDLE, function() print("STATION_IDLE") end)
wifi.sta.eventMonReg(wifi.STA_CONNECTING, function() print("STATION_CONNECTING") end)
wifi.sta.eventMonReg(wifi.STA_WRONGPWD, function() print("STATION_WRONG_PASSWORD") end)
wifi.sta.eventMonReg(wifi.STA_APNOTFOUND, function() print("STATION_NO_AP_FOUND") end)
wifi.sta.eventMonReg(wifi.STA_FAIL, function() print("STATION_CONNECT_FAIL") end)
wifi.sta.eventMonReg(wifi.STA_GOTIP, function() print("STATION_GOT_IP") end)

--register callback: use previous state
wifi.sta.eventMonReg(wifi.STA_CONNECTING, function(previous_State)
    if(previous_State==wifi.STA_GOTIP) then
        print("Station lost connection with access point\n\tAttempting to reconnect...")
    else
        print("STATION_CONNECTING")
    end
end)

--unregister callback
wifi.sta.eventMonReg(wifi.STA_IDLE)

wifi.sta.eventMonStart()¶

Starts WiFi station event monitor.

Syntax¶

wifi.sta.eventMonStart([ms])

Parameters¶

ms interval between checks in milliseconds, defaults to 150ms if not provided.

Returns¶

nil

Example¶

--start WiFi event monitor with default interval
wifi.sta.eventMonStart()

--start WiFi event monitor with 100ms interval
wifi.sta.eventMonStart(100)

wifi.sta.eventMonStop()¶

Stops WiFi station event monitor.

Syntax¶

wifi.sta.eventMonStop([unregister_all])

Parameters¶

unregister_all enter 1 to unregister all previously registered functions.
- Note: leave blank to leave callbacks registered

Returns¶

nil

Example¶

--stop WiFi event monitor
wifi.sta.eventMonStop()

--stop WiFi event monitor and unregister all callbacks
wifi.sta.eventMonStop(1)

wifi.sta.getap()¶

Scans AP list as a Lua table into callback function.

Syntax¶

wifi.sta.getap([[cfg], format,] callback(table))

Parameters¶

cfg table that contains scan configuration
- ssid SSID == nil, don't filter SSID
- bssid BSSID == nil, don't filter BSSID
- channel channel == 0, scan all channels, otherwise scan set channel (default is 0)
- show_hidden show_hidden == 1, get info for router with hidden SSID (default is 0)
format select output table format, defaults to 0
- 0: old format (SSID : Authmode, RSSI, BSSID, Channel), any duplicate SSIDs will be discarded
- 1: new format (BSSID : SSID, RSSI, auth mode, Channel)
callback(table) a callback function to receive the AP table when the scan is done. This function receives a table, the key is the BSSID, the value is other info in format: SSID, RSSID, auth mode, channel.

Returns¶

nil

Example¶

-- print AP list in old format (format not defined)
function listap(t)
    for k,v in pairs(t) do
        print(k.." : "..v)
    end
end
wifi.sta.getap(listap)

-- Print AP list that is easier to read
function listap(t) -- (SSID : Authmode, RSSI, BSSID, Channel)
    print("\n"..string.format("%32s","SSID").."\tBSSID\t\t\t\t  RSSI\t\tAUTHMODE\tCHANNEL")
    for ssid,v in pairs(t) do
        local authmode, rssi, bssid, channel = string.match(v, "([^,]+),([^,]+),([^,]+),([^,]+)")
        print(string.format("%32s",ssid).."\t"..bssid.."\t  "..rssi.."\t\t"..authmode.."\t\t\t"..channel)
    end
end
wifi.sta.getap(listap)

-- print AP list in new format
function listap(t)
    for k,v in pairs(t) do
        print(k.." : "..v)
    end
end
wifi.sta.getap(1, listap)

-- Print AP list that is easier to read
function listap(t) -- (SSID : Authmode, RSSI, BSSID, Channel)
    print("\n\t\t\tSSID\t\t\t\t\tBSSID\t\t\t  RSSI\t\tAUTHMODE\t\tCHANNEL")
    for bssid,v in pairs(t) do
        local ssid, rssi, authmode, channel = string.match(v, "([^,]+),([^,]+),([^,]+),([^,]*)")
        print(string.format("%32s",ssid).."\t"..bssid.."\t  "..rssi.."\t\t"..authmode.."\t\t\t"..channel)
    end
end
wifi.sta.getap(1, listap)

--check for specific AP
function listap(t)
    print("\n\t\t\tSSID\t\t\t\t\tBSSID\t\t\t  RSSI\t\tAUTHMODE\t\tCHANNEL")
    for bssid,v in pairs(t) do
        local ssid, rssi, authmode, channel = string.match(v, "([^,]+),([^,]+),([^,]+),([^,]*)")
        print(string.format("%32s",ssid).."\t"..bssid.."\t  "..rssi.."\t\t"..authmode.."\t\t\t"..channel)
    end
end
scan_cfg = {}
scan_cfg.ssid = "myssid"
scan_cfg.bssid = "AA:AA:AA:AA:AA:AA"
scan_cfg.channel = 0
scan_cfg.show_hidden = 1
wifi.sta.getap(scan_cfg, 1, listap)

--get RSSI for currently configured AP
function listap(t)
    for bssid,v in pairs(t) do
        local ssid, rssi, authmode, channel = string.match(v, "([^,]+),([^,]+),([^,]+),([^,]*)")
        print("CURRENT RSSI IS: "..rssi)
    end
end
ssid, tmp, bssid_set, bssid=wifi.sta.getconfig()

scan_cfg = {}
scan_cfg.ssid = ssid
if bssid_set == 1 then scan_cfg.bssid = bssid else scan_cfg.bssid = nil end
scan_cfg.channel = wifi.getchannel()
scan_cfg.show_hidden = 0
ssid, tmp, bssid_set, bssid=nil, nil, nil, nil
wifi.sta.getap(scan_cfg, 1, listap)

wifi.sta.getapindex()¶

Get index of current Access Point stored in AP cache.

Syntax¶

wifi.sta.getapindex()

Parameters¶

none

Returns¶

current_index index of currently selected Access Point. (Range:1-5)

Example¶

print("the index of the currently selected AP is: "..wifi.sta.getapindex())

wifi.sta.getapinfo()¶

Get information of APs cached by ESP8266 station.

Note

Any Access Points configured with save disabled wifi.sta.config({save=false}) will populate this list (appearing to overwrite APs stored in flash) until restart.

Syntax¶

wifi.sta.getapinfo()

Parameters¶

nil

Returns¶

ap_info
qty quantity of APs returned
1-5 index of AP. (the index corresponds to index used by wifi.sta.changeap() and wifi.sta.getapindex())
ssid ssid of Access Point
pwd Password for Access Point
- If no password was configured, the pwd field will be nil
bssid MAC address of Access Point
- If no MAC address was configured, the bssid field will be nil

Example¶

--print stored access point info
do
  for k,v in pairs(wifi.sta.getapinfo()) do
    if (type(v)=="table") then
      print(" "..k.." : "..type(v))
      for k,v in pairs(v) do
        print("\t\t"..k.." : "..v)
      end
    else
      print(" "..k.." : "..v)
    end
  end
end

--print stored access point info(formatted)
do
  local x=wifi.sta.getapinfo()
  local y=wifi.sta.getapindex()
  print("\n Number of APs stored in flash:", x.qty)
  print(string.format("  %-6s %-32s %-64s %-18s", "index:", "SSID:", "Password:", "BSSID:")) 
  for i=1, (x.qty), 1 do
    print(string.format(" %s%-6d %-32s %-64s %-18s",(i==y and ">" or " "), i, x[i].ssid, x[i].pwd and x[i].pwd or type(nil), x[i].bssid and x[i].bssid or type(nil)))
  end
end

wifi.sta.getbroadcast()¶

Gets the broadcast address in station mode.

Syntax¶

wifi.sta.getbroadcast()

Parameters¶

nil

Returns¶

broadcast address as string, for example "192.168.0.255", returns nil if IP address = "0.0.0.0".

wifi.sta.getconfig()¶

Gets the WiFi station configuration.

Syntax¶

wifi.sta.getconfig()

Parameters¶

return_table
true returns data in a table
false returns data in the old format (default)

Returns¶

If return_table is true: - config_table - ssid ssid of Access Point. - pwd password to Access Point. - If no password was configured, the pwd field will be nil - bssid MAC address of Access Point - If no MAC address was configured, the bssid field will be nil

If return_table is false: - ssid, password, bssid_set, bssid
- Note: If bssid_set is equal to 0 then bssid is irrelevant,

Example¶

--Get current Station configuration (NEW FORMAT)
do
local def_sta_config=wifi.sta.getconfig(true)
print(string.format("\tDefault station config\n\tssid:\"%s\"\tpassword:\"%s\"%s", def_sta_config.ssid, def_sta_config.pwd, (type(def_sta_config.bssid)=="string" and "\tbssid:\""..def_sta_config.bssid.."\"" or "")))
end

--Get current Station configuration (OLD FORMAT)
ssid, password, bssid_set, bssid=wifi.sta.getconfig()
print("\nCurrent Station configuration:\nSSID : "..ssid
.."\nPassword  : "..password
.."\nBSSID_set  : "..bssid_set
.."\nBSSID: "..bssid.."\n")
ssid, password, bssid_set, bssid=nil, nil, nil, nil

wifi.sta.getdefaultconfig()¶

Gets the default WiFi station configuration stored in flash.

Syntax¶

wifi.sta.getdefaultconfig(return_table)

Parameters¶

return_table
true returns data in a table
false returns data in the old format (default)

Returns¶

If return_table is true: - config_table - ssid ssid of Access Point. - pwd password to Access Point. - If no password was configured, the pwd field will be nil - bssid MAC address of Access Point - If no MAC address was configured, the bssid field will be nil

If return_table is false: - ssid, password, bssid_set, bssid
- Note: If bssid_set is equal to 0 then bssid is irrelevant,

Example¶

--Get default Station configuration (NEW FORMAT)
do
  local def_sta_config=wifi.sta.getdefaultconfig(true)
  print(string.format("\tDefault station config\n\tssid:\"%s\"\tpassword:\"%s\"%s", def_sta_config.ssid, def_sta_config.pwd, (type(def_sta_config.bssid)=="string" and "\tbssid:\""..def_sta_config.bssid.."\"" or "")))
end

--Get default Station configuration (OLD FORMAT)
ssid, password, bssid_set, bssid=wifi.sta.getdefaultconfig()
print("\nCurrent Station configuration:\nSSID : "..ssid
.."\nPassword  : "..password
.."\nBSSID_set  : "..bssid_set
.."\nBSSID: "..bssid.."\n")
ssid, password, bssid_set, bssid=nil, nil, nil, nil

wifi.sta.gethostname()¶

Gets current station hostname.

Syntax¶

wifi.sta.gethostname()

Parameters¶

none

Returns¶

currently configured hostname

Example¶

print("Current hostname is: \""..wifi.sta.gethostname().."\"")

wifi.sta.getip()¶

Gets IP address, netmask, and gateway address in station mode.

Syntax¶

wifi.sta.getip()

Parameters¶

none

Returns¶

IP address, netmask, gateway address as string, for example "192.168.0.111". Returns nil if IP = "0.0.0.0".

Example¶

-- print current IP address, netmask, gateway
print(wifi.sta.getip())
-- 192.168.0.111  255.255.255.0  192.168.0.1
ip = wifi.sta.getip()
print(ip)
-- 192.168.0.111
ip, nm = wifi.sta.getip()
print(nm)
-- 255.255.255.0

wifi.sta.getmac()¶

Gets MAC address in station mode.

Syntax¶

wifi.sta.getmac()

Parameters¶

none

Returns¶

MAC address as string e.g. "18:fe:34:a2:d7:34"

wifi.sta.getrssi()¶

Get RSSI(Received Signal Strength Indicator) of the Access Point which ESP8266 station connected to.

Syntax¶

wifi.sta.getrssi()

Parameters¶

none

Returns¶

If station is connected to an access point, rssi is returned.
If station is not connected to an access point, nil is returned.

Example¶

RSSI=wifi.sta.getrssi()
print("RSSI is", RSSI)

wifi.sta.setaplimit()¶

Set Maximum number of Access Points to store in flash. - This value is written to flash

Attention

If 5 Access Points are stored and AP limit is set to 4, the AP at index 5 will remain until node.restore() is called or AP limit is set to 5 and AP is overwritten.

Syntax¶

wifi.sta.setaplimit(qty)

Parameters¶

qty Quantity of Access Points to store in flash. Range: 1-5 (Default: 5)

Returns¶

true Success
false Failure

Example¶

wifi.sta.setaplimit(true)

wifi.sta.sethostname()¶

Sets station hostname.

Syntax¶

wifi.sta.sethostname(hostname)

Parameters¶

hostname must only contain letters, numbers and hyphens('-') and be 32 characters or less with first and last character being alphanumeric

Returns¶

nil

Example¶

if (wifi.sta.sethostname("NodeMCU") == true) then
    print("hostname was successfully changed")
else
    print("hostname was not changed")
end

wifi.sta.setip()¶

Sets IP address, netmask, gateway address in station mode.

Syntax¶

wifi.sta.setip(cfg)

Parameters¶

cfg table contain IP address, netmask, and gateway

{
  ip = "192.168.0.111",
  netmask = "255.255.255.0",
  gateway = "192.168.0.1"
}

Returns¶

true if success, false otherwise

wifi.sta.setmac()¶

Sets MAC address in station mode.

Syntax¶

wifi.sta.setmac(mac)

Parameters¶

MAC address in string e.g. "DE:AD:BE:EF:7A:C0"

Returns¶

true if success, false otherwise

Example¶

print(wifi.sta.setmac("DE:AD:BE:EF:7A:C0"))

wifi.sta.sleeptype()¶

Configures the WiFi modem sleep type to be used while station is connected to an Access Point.

!!! note
    Does not apply to `wifi.SOFTAP`, `wifi.STATIONAP` or `wifi.NULLMODE`.

Syntax¶

wifi.sta.sleeptype(type_wanted)

Parameters¶

type_wanted one of the following:

wifi.NONE_SLEEP to keep the modem on at all times
wifi.LIGHT_SLEEP to allow the CPU to power down under some circumstances
wifi.MODEM_SLEEP to power down the modem as much as possible

Returns¶

The actual sleep mode set, as one of wifi.NONE_SLEEP, wifi.LIGHT_SLEEP or wifi.MODEM_SLEEP.

wifi.sta.status()¶

Gets the current status in station mode.

Syntax¶

wifi.sta.status()

Parameters¶

nil

Returns¶

number： 0~5

0: STA_IDLE,
1: STA_CONNECTING,
2: STA_WRONGPWD,
3: STA_APNOTFOUND,
4: STA_FAIL,
5: STA_GOTIP.

wifi.ap Module¶

wifi.ap.config()¶

Sets SSID and password in AP mode. Be sure to make the password at least 8 characters long! If you don't it will default to no password and not set the SSID! It will still work as an access point but use a default SSID like e.g. NODE-9997C3.

Syntax¶

wifi.ap.config(cfg)

Parameters¶

cfg table to hold configuration
ssid SSID chars 1-32
pwd password chars 8-64
auth authentication method, one of wifi.OPEN (default), wifi.WPA_PSK, wifi.WPA2_PSK, wifi.WPA_WPA2_PSK
channel channel number 1-14 default = 6
hidden false = not hidden, true = hidden, default = false
max maximum number of connections 1-4 default=4
beacon beacon interval time in range 100-60000, default = 100
save save configuration to flash.
true configuration will be retained through power cycle. (Default)
false configuration will not be retained through power cycle.

Returns¶

true Success
false Failure

Example:¶

 cfg={}
 cfg.ssid="myssid"
 cfg.pwd="mypassword"
 wifi.ap.config(cfg)

wifi.ap.deauth()¶

Deauths (forcibly removes) a client from the ESP access point by sending a corresponding IEEE802.11 management packet (first) and removing the client from it's data structures (afterwards).

The IEEE802.11 reason code used is 2 for "Previous authentication no longer valid"(AUTH_EXPIRE).

Syntax¶

wifi.ap.deauth([MAC])

Parameters¶

MAC address of station to be deauthed.
- Note: if this field is left blank, all currently connected stations will get deauthed.

Returns¶

Returns true unless called while the ESP is in the STATION opmode

Example¶

allowed_mac_list={"18:fe:34:00:00:00", "18:fe:34:00:00:01"}

wifi.eventmon.register(wifi.eventmon.AP_STACONNECTED, function(T)
  print("\n\tAP - STATION CONNECTED".."\n\tMAC: "..T.MAC.."\n\tAID: "..T.AID)
  if(allowed_mac_list~=nil) then
    for _, v in pairs(allowed_mac_list) do
      if(v == T.MAC) then return end
    end
  end
  wifi.ap.deauth(T.MAC)
  print("\tStation DeAuthed!")
end)

wifi.ap.getbroadcast()¶

Gets broadcast address in AP mode.

Syntax¶

wifi.ap.getbroadcast()

Parameters¶

none

Returns¶

broadcast address in string, for example "192.168.0.255", returns nil if IP address = "0.0.0.0".

Example¶

bc = wifi.ap.getbroadcast()
print(bc)
-- 192.168.0.255

wifi.ap.getclient()¶

Gets table of clients connected to device in AP mode.

Syntax¶

wifi.ap.getclient()

Parameters¶

none

Returns¶

table of connected clients

Example¶

table={}
table=wifi.ap.getclient()
for mac,ip in pairs(table) do
    print(mac,ip)
end

-- or shorter
for mac,ip in pairs(wifi.ap.getclient()) do
    print(mac,ip)
end

wifi.ap.getconfig()¶

Gets the current SoftAP configuration.

Syntax¶

wifi.ap.getconfig(return_table)

Parameters¶

return_table
true returns data in a table
false returns data in the old format (default)

Returns¶

If return_table is true: - config_table - ssid Network name - pwd Password - If no password was configured, the pwd field will be nil - auth Authentication Method (wifi.OPEN, wifi.WPA_PSK, wifi.WPA2_PSK or wifi.WPA_WPA2_PSK) - channel Channel number - hidden false = not hidden, true = hidden - max Maximum number of client connections - beacon Beacon interval

If return_table is false: ssid, password
Note: If bssid_set is equal to 0 then bssid is irrelevant

Example¶

--Get SoftAP configuration table (NEW FORMAT)
do
  print("\n  Current SoftAP configuration:")
  for k,v in pairs(wifi.ap.getconfig(true)) do
      print("   "..k.." :",v)
  end
end

--Get current SoftAP configuration (OLD FORMAT)
do
  local ssid, password=wifi.ap.getconfig()
  print("\n  Current SoftAP configuration:\n   SSID : "..ssid..
    "\n   Password  :",password)
  ssid, password=nil, nil
end

wifi.ap.getdefaultconfig()¶

Gets the default SoftAP configuration stored in flash.

Syntax¶

wifi.ap.getdefaultconfig(return_table)

Parameters¶

return_table
true returns data in a table
false returns data in the old format (default)

Returns¶

If return_table is true: - config_table - ssid Network name - pwd Password - If no password was configured, the pwd field will be nil - auth Authentication Method (wifi.OPEN, wifi.WPA_PSK, wifi.WPA2_PSK or wifi.WPA_WPA2_PSK) - channel Channel number - hidden false = not hidden, true = hidden - max Maximum number of client connections - beacon Beacon interval

If return_table is false: ssid, password
Note: If bssid_set is equal to 0 then bssid is irrelevant

Example¶

--Get default SoftAP configuration table (NEW FORMAT)
do
  print("\n  Default SoftAP configuration:")
  for k,v in pairs(wifi.ap.getdefaultconfig(true)) do
      print("   "..k.." :",v)
  end
end

--Get default SoftAP configuration (OLD FORMAT)
do
  local ssid, password=wifi.ap.getdefaultconfig()
  print("\n  Default SoftAP configuration:\n   SSID : "..ssid..
    "\n   Password  :",password)
  ssid, password=nil, nil
end

wifi.ap.getip()¶

Gets IP address, netmask and gateway in AP mode.

Syntax¶

wifi.ap.getip()

Parameters¶

none

Returns¶

IP address, netmask, gateway address as string, for example "192.168.0.111", returns nil if IP address = "0.0.0.0".

Example¶

-- print current ip, netmask, gateway
print(wifi.ap.getip())
-- 192.168.4.1  255.255.255.0  192.168.4.1
ip = wifi.ap.getip()
print(ip)
-- 192.168.4.1
ip, nm = wifi.ap.getip()
print(nm)
-- 255.255.255.0
ip, nm, gw = wifi.ap.getip()
print(gw)
-- 192.168.4.1

wifi.ap.getmac()¶

Gets MAC address in AP mode.

Syntax¶

wifi.ap.getmac()

Parameters¶

none

Returns¶

MAC address as string, for example "1A-33-44-FE-55-BB"

wifi.ap.setip()¶

Sets IP address, netmask and gateway address in AP mode.

Syntax¶

wifi.ap.setip(cfg)

Parameters¶

cfg table contain IP address, netmask, and gateway

Returns¶

true if successful, false otherwise

Example¶

cfg =
{
    ip="192.168.1.1",
    netmask="255.255.255.0",
    gateway="192.168.1.1"
}
wifi.ap.setip(cfg)

wifi.ap.setmac()¶

Sets MAC address in AP mode.

Syntax¶

wifi.ap.setmac(mac)

Parameters¶

MAC address in byte string, for example "AC-1D-1C-B1-0B-22"

Returns¶

true if success, false otherwise

Example¶

print(wifi.ap.setmac("AC-1D-1C-B1-0B-22"))

wifi.ap.dhcp Module¶

wifi.ap.dhcp.config()¶

Configure the dhcp service. Currently only supports setting the start address of the dhcp address pool.

Syntax¶

wifi.ap.dhcp.config(dhcp_config)

Parameters¶

dhcp_config table containing the start-IP of the DHCP address pool, eg. "192.168.1.100"

Returns¶

pool_startip, pool_endip

Example¶

dhcp_config ={}
dhcp_config.start = "192.168.1.100"
wifi.ap.dhcp.config(dhcp_config)

wifi.ap.dhcp.start()¶

Starts the DHCP service.

Syntax¶

wifi.ap.dhcp.start()

Parameters¶

none

Returns¶

boolean indicating success

wifi.ap.dhcp.stop()¶

Stops the DHCP service.

Syntax¶

wifi.ap.dhcp.stop()

Parameters¶

none

Returns¶

boolean indicating success

wifi.eventmon Module¶

Note: The functions wifi.sta.eventMon___() and wifi.eventmon.___() are completely seperate and can be used independently of one another.

wifi.eventmon.register()¶

Register/unregister callbacks for WiFi event monitor.

Syntax¶

wifi.eventmon.register(Event[, function(T)])

Parameters¶

Event: WiFi event you would like to set a callback for.

Valid WiFi events:
- wifi.eventmon.STA_CONNECTED
- wifi.eventmon.STA_DISCONNECTED
- wifi.eventmon.STA_AUTHMODE_CHANGE
- wifi.eventmon.STA_GOT_IP
- wifi.eventmon.STA_DHCP_TIMEOUT
- wifi.eventmon.AP_STACONNECTED
- wifi.eventmon.AP_STADISCONNECTED
- wifi.eventmon.AP_PROBEREQRECVED

Returns¶

Function:
nil

Callback:
T: Table returned by event.

wifi.eventmon.STA_CONNECTED Station is connected to access point.
- SSID: SSID of access point.
- BSSID: BSSID of access point.
- channel: The channel the access point is on.
wifi.eventmon.STA_DISCONNECTED: Station was disconnected from access point.
- SSID: SSID of access point.
- BSSID: BSSID of access point.
- REASON: See wifi.eventmon.reason below.
wifi.eventmon.STA_AUTHMODE_CHANGE: Access point has changed authorization mode.
- old_auth_mode: Old wifi authorization mode.
- new_auth_mode: New wifi authorization mode.
wifi.eventmon.STA_GOT_IP: Station got an IP address.
- IP: The IP address assigned to the station.
- netmask: Subnet mask.
- gateway: The IP address of the access point the station is connected to.
wifi.eventmon.STA_DHCP_TIMEOUT: Station DHCP request has timed out.
- Blank table is returned.
wifi.eventmon.AP_STACONNECTED: A new client has connected to the access point.
- MAC: MAC address of client that has connected.
- AID: SDK provides no details concerning this return value.
wifi.eventmon.AP_STADISCONNECTED: A client has disconnected from the access point.
- MAC: MAC address of client that has disconnected.
- AID: SDK provides no details concerning this return value.
wifi.eventmon.AP_PROBEREQRECVED: A probe request was received.
- MAC: MAC address of the client that is probing the access point.
- RSSI: Received Signal Strength Indicator of client.

Example¶

 wifi.eventmon.register(wifi.eventmon.STA_CONNECTED, function(T)
 print("\n\tSTA - CONNECTED".."\n\tSSID: "..T.SSID.."\n\tBSSID: "..
 T.BSSID.."\n\tChannel: "..T.channel)
 end)

 wifi.eventmon.register(wifi.eventmon.STA_DISCONNECTED, function(T)
 print("\n\tSTA - DISCONNECTED".."\n\tSSID: "..T.SSID.."\n\tBSSID: "..
 T.BSSID.."\n\treason: "..T.reason)
 end)

 wifi.eventmon.register(wifi.eventmon.STA_AUTHMODE_CHANGE, Function(T)
 print("\n\tSTA - AUTHMODE CHANGE".."\n\told_auth_mode: "..
 T.old_auth_mode.."\n\tnew_auth_mode: "..T.new_auth_mode)
 end)

 wifi.eventmon.register(wifi.eventmon.STA_GOT_IP, function(T)
 print("\n\tSTA - GOT IP".."\n\tStation IP: "..T.IP.."\n\tSubnet mask: "..
 T.netmask.."\n\tGateway IP: "..T.gateway)
 end)

 wifi.eventmon.register(wifi.eventmon.STA_DHCP_TIMEOUT, function()
 print("\n\tSTA - DHCP TIMEOUT")
 end)

 wifi.eventmon.register(wifi.eventmon.AP_STACONNECTED, function(T)
 print("\n\tAP - STATION CONNECTED".."\n\tMAC: "..T.MAC.."\n\tAID: "..T.AID)
 end)

 wifi.eventmon.register(wifi.eventmon.AP_STADISCONNECTED, function(T)
 print("\n\tAP - STATION DISCONNECTED".."\n\tMAC: "..T.MAC.."\n\tAID: "..T.AID)
 end)

 wifi.eventmon.register(wifi.eventmon.AP_PROBEREQRECVED, function(T)
 print("\n\tAP - STATION DISCONNECTED".."\n\tMAC: ".. T.MAC.."\n\tRSSI: "..T.RSSI)
 end)

wifi.eventmon.unregister()¶

Unregister callbacks for WiFi event monitor.

Syntax¶

wifi.eventmon.unregister(Event)

Parameters¶

Event: WiFi event you would like to set a callback for.

Valid WiFi events:
- wifi.eventmon.STA_CONNECTED
- wifi.eventmon.STA_DISCONNECTED
- wifi.eventmon.STA_AUTHMODE_CHANGE
- wifi.eventmon.STA_GOT_IP
- wifi.eventmon.STA_DHCP_TIMEOUT
- wifi.eventmon.AP_STACONNECTED
- wifi.eventmon.AP_STADISCONNECTED
- wifi.eventmon.AP_PROBEREQRECVED

Returns¶

nil

Example¶

 wifi.eventmon.unregister(wifi.eventmon.STA_CONNECTED)

wifi.eventmon.reason¶

Table containing disconnect reasons.

Disconnect reason	value
wifi.eventmon.reason.UNSPECIFIED	1
wifi.eventmon.reason.AUTH_EXPIRE	2
wifi.eventmon.reason.AUTH_LEAVE	3
wifi.eventmon.reason.ASSOC_EXPIRE	4
wifi.eventmon.reason.ASSOC_TOOMANY	5
wifi.eventmon.reason.NOT_AUTHED	6
wifi.eventmon.reason.NOT_ASSOCED	7
wifi.eventmon.reason.ASSOC_LEAVE	8
wifi.eventmon.reason.ASSOC_NOT_AUTHED	9
wifi.eventmon.reason.DISASSOC_PWRCAP_BAD	10
wifi.eventmon.reason.DISASSOC_SUPCHAN_BAD	11
wifi.eventmon.reason.IE_INVALID	13
wifi.eventmon.reason.MIC_FAILURE	14
wifi.eventmon.reason.4WAY_HANDSHAKE_TIMEOUT	15
wifi.eventmon.reason.GROUP_KEY_UPDATE_TIMEOUT	16
wifi.eventmon.reason.IE_IN_4WAY_DIFFERS	17
wifi.eventmon.reason.GROUP_CIPHER_INVALID	18
wifi.eventmon.reason.PAIRWISE_CIPHER_INVALID	19
wifi.eventmon.reason.AKMP_INVALID	20
wifi.eventmon.reason.UNSUPP_RSN_IE_VERSION	21
wifi.eventmon.reason.INVALID_RSN_IE_CAP	22
wifi.eventmon.reason.802_1X_AUTH_FAILED	23
wifi.eventmon.reason.CIPHER_SUITE_REJECTED	24
wifi.eventmon.reason.BEACON_TIMEOUT	200
wifi.eventmon.reason.NO_AP_FOUND	201
wifi.eventmon.reason.AUTH_FAIL	202
wifi.eventmon.reason.ASSOC_FAIL	203
wifi.eventmon.reason.HANDSHAKE_TIMEOUT	204

WiFi Module¶

wifi.getchannel()¶

Syntax¶

Parameters¶

Returns¶

wifi.getdefaultmode()¶

Syntax¶

Parameters¶

Returns¶

See also¶

wifi.getmode()¶

Syntax¶

Parameters¶

Returns¶

See also¶

wifi.getphymode()¶

Syntax¶

Parameters¶

Returns¶

See also¶

wifi.setmode()¶

Syntax¶

Parameters¶

Returns¶

Example¶

See also¶

wifi.setphymode()¶

Syntax¶

Parameters¶

Returns¶

See also¶

wifi.nullmodesleep()¶

Syntax¶

Parameters¶

Returns¶

wifi.startsmart()¶

Syntax¶

Parameters¶

Returns¶

Example¶

See also¶

wifi.stopsmart()¶

Syntax¶

Parameters¶

Returns¶

See also¶

wifi.sta Module¶

wifi.sta.autoconnect()¶

Syntax¶

Parameters¶

Returns¶

Example¶

See also¶

wifi.sta.changeap()¶

Syntax¶

Parameters¶

Returns¶

Example¶

See also¶

wifi.sta.config()¶

Syntax¶

Parameters¶

Returns¶

Example¶

See also¶

wifi.sta.connect()¶

Syntax¶

Parameters¶

Returns¶

See also¶

wifi.sta.disconnect()¶

Syntax¶

Parameters¶

Returns¶

See also¶

wifi.sta.eventMonReg()¶

Syntax¶

Parameters¶

Returns¶

Example¶