This class is represented in Arduino WiFi library by scanNetworks() function. Developers of esp8266 / Arduino core extend this functionality by additional methods and properties.
Wi-Fi Scanner allows you to easily locate visible wireless networks and its corresponding information. The tool obtains the network name (SSID), signal strength (RSSI) and quality, MAC address (BSSID), channel, maximum and achievable data rate, security, and much more.
- Channels 1, 6, and 11 are the most frequently used for 2.4 GHz Wi-Fi, and these three are the only ones that don’t overlap with each other. Windows: NirSoft WifiInfoView We previously recommended inSSIDer for this on Windows, but it’s become paid software.
- When the Wi-Fi Scanner begins to run, you will immediately see all wireless networks located nearby and its signal level. You can work out the optimal position for their access point at home, so.
- WiFi Scanner is a free 802.11 wireless scanner and connection manager for Mac OS X 10.6 Snow Leopard or later. This will detect access points and clients in ad-hoc mode if the SSID is being.
Chromium 80. Documentation of this class is divided into two parts. First covers functions to scan for available networks. Second describes what information is collected during scanning process and how to access it.
Scanning for networks takes hundreds of milliseconds to complete. This may be done in a single run when we are triggering scan process, waiting for completion, and providing result - all by a single function. Another option is to split this into steps, each done by a separate function. This way we can execute other tasks while scanning is in progress. This is called asynchronous scanning. Both methods of scanning are documented below.
scanNetworks¶
Scan for available Wi-Fi networks in one run and return the number of networks that has been discovered.
There is on overload of this function that accepts two optional parameters to provide extended functionality of asynchronous scanning as well as looking for hidden networks.
Both function parameters are of
boolean
type. They provide the flowing functionality: * asysnc
- if set to true
then scanning will start in background and function will exit without waiting for result. To check for result use separate function scanComplete
that is described below. * show_hidden
- set it to true
to include in scan result networks with hidden SSID.scanComplete¶
Check for result of asynchronous scanning.
On scan completion function returns the number of discovered networks.
If scan is not done, then returned value is < 0 as follows: * Scanning still in progress: -1 * Scanning has not been triggered: -2 Personal finance management.
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scanDelete¶
Delete the last scan result from memory.
scanNetworksAsync¶
Start scanning for available Wi-Fi networks. On completion execute another function.
Function parameters: *
onComplete
- the event handler executedwhen the scan is done*
show_hidden
- optional boolean
parameter, set it totrue
to scan for hidden networksExample code:
Example output:
Functions below provide access to result of scanning. It does not matter if scanning has been done in synchronous or asynchronous mode, scan results are available using the same API.
Individual results are accessible by providing a `networkItem’ that identifies the index (zero based) of discovered network.
SSID¶
Return the SSID of a network discovered during the scan.
Returned SSID is of the
String
type. The networkItem
is a zero based index of network discovered during scan.encryptionType¶
Return the encryption type of a network discovered during the scan.
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Function returns a number that encodes encryption type as follows: * 5:
ENC_TYPE_WEP
- WEP * 2 : ENC_TYPE_TKIP
- WPA / PSK * 4 :ENC_TYPE_CCMP
- WPA2 / PSK * 7 : ENC_TYPE_NONE
- open network* 8 : ENC_TYPE_AUTO
- WPA / WPA2 / PSKThe
networkItem
is a zero based index of network discovered during scan.RSSI¶
Return the RSSI (Received Signal Strength Indication) of a network discovered during the scan.
Returned RSSI is of the
int32_t
type. The networkItem
is a zero based index of network discovered during scan.BSSID¶
Return the BSSID (Basic Service Set Identification) that is another name of MAC address of a network discovered during the scan.
Function returns a pointer to the memory location (an
uint8_t
array with the size of 6 elements) where the BSSID is saved.If you do not like to pointers, then there is another version of this function that returns a
String
.Audiojungle sparkle pop bonus 11751288 download free. The
networkItem
is a zero based index of network discovered during scan.channel¶
Return the channel of a network discovered during the scan.
Returned channel is of the
int32_t
type. The networkItem
is a zero based index of network discovered during scan.isHidden¶
Return information if a network discovered during the scan is hidden or not.
Returned value if the
boolean
type, and true
means that network is hidden. The networkItem
is a zero based index of network discovered during scan.getNetworkInfo¶
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Return all the network information discussed in this chapter above in a single function call.
The
networkItem
is a zero based index of network discovered during scan. All other input parameters are passed to function by reference. Therefore they will be updated with actual values retrieved for particular networkItem
. The function itself returns boolean
true
or false
to confirm if information retrieval was successful or not.Example code:
Example output:
For code samples please refer to separate section with examples dedicated specifically to the Scan Class.
Easy-to-use tool to scan for and analyze 802.11a/b/g/n/ac wireless networks
Wi-Fi Scanner allows you to easily locate visible wireless networks and its corresponding information. The tool obtains the network name (SSID), signal strength (RSSI) and quality, MAC address (BSSID), channel, maximum and achievable data rate, security, and much more.
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Wi-Fi Scanner is useful for normal access point users who need to find out the signal strength distribution for their wireless network at home, or choose a position for their access point for optimal signal quality.
Using Wi-Fi Scanner, you can evaluate the allocation of wireless networks by channel and select the least congested bandwidth for their access point, allowing them to increase their connection speed significantly.
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In addition, Wi-Fi Scanner is an indispensable tool for corporate network administrators in performing tasks such as configuration, planning and monitoring security parameters on business wireless networks.
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Key features
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