I am using WLAN Api i.e WlanGetAvailableNetworkList() for signal strength of wireless lan modem/USB datacard. Does anyone have some code example or some information please?
WLAN API for getting signal strenth
If you are using Python, there is sample code here.
If you are using C++, the documentation provides a good example:
#define UNICODE
#include <windows.h>
#include <wlanapi.h>
#include <objbase.h>
#include <wtypes.h>
#include <stdio.h>
#include <stdlib.h>
// Need to link with Wlanapi.lib and Ole32.lib
#pragma comment(lib, "wlanapi.lib")
#pragma comment(lib, "ole32.lib")
int wmain()
{
// Declare and initialize variables.
HANDLE hClient = NULL;
DWORD dwMaxClient = 2; //
DWORD dwCurVersion = 0;
DWORD dwResult = 0;
DWORD dwRetVal = 0;
int iRet = 0;
WCHAR GuidString[39] = {0};
unsigned int i, j, k;
/* variables used for WlanEnumInterfaces */
PWLAN_INTERFACE_INFO_LIST pIfList = NULL;
PWLAN_INTERFACE_INFO pIfInfo = NULL;
PWLAN_AVAILABLE_NETWORK_LIST pBssList = NULL;
PWLAN_AVAILABLE_NETWORK pBssEntry = NULL;
dwResult = WlanOpenHandle(dwMaxClient, NULL, &dwCurVersion, &hClient);
if (dwResult != ERROR_SUCCESS) {
wprintf(L"WlanOpenHandle failed with error: %u\n", dwResult);
return 1;
// You can use FormatMessage here to find out why the function failed
}
dwResult = WlanEnumInterfaces(hClient, NULL, &pIfList);
if (dwResult != ERROR_SUCCESS) {
wprintf(L"WlanEnumInterfaces failed with error: %u\n", dwResult);
return 1;
// You can use FormatMessage here to find out why the function failed
} else {
wprintf(L"Num Entries: %lu\n", pIfList->dwNumberOfItems);
wprintf(L"Current Index: %lu\n", pIfList->dwIndex);
for (i = 0; i < (int) pIfList->dwNumberOfItems; i++) {
pIfInfo = (WLAN_INTERFACE_INFO *) &pIfList->InterfaceInfo[i];
wprintf(L" Interface Index[%u]:\t %lu\n", i, i);
iRet = StringFromGUID2(pIfInfo->InterfaceGuid, (LPOLESTR) &GuidString,
sizeof(GuidString)/sizeof(*GuidString));
// For c rather than C++ source code, the above line needs to be
// iRet = StringFromGUID2(&pIfInfo->InterfaceGuid, (LPOLESTR) &GuidString,
// sizeof(GuidString)/sizeof(*GuidString));
if (iRet == 0)
wprintf(L"StringFromGUID2 failed\n");
else {
wprintf(L" InterfaceGUID[%d]: %ws\n",i, GuidString);
}
wprintf(L" Interface Description[%d]: %ws", i,
pIfInfo->strInterfaceDescription);
wprintf(L"\n");
wprintf(L" Interface State[%d]:\t ", i);
switch (pIfInfo->isState) {
case wlan_interface_state_not_ready:
wprintf(L"Not ready\n");
break;
case wlan_interface_state_connected:
wprintf(L"Connected\n");
break;
case wlan_interface_state_ad_hoc_network_formed:
wprintf(L"First node in a ad hoc network\n");
break;
case wlan_interface_state_disconnecting:
wprintf(L"Disconnecting\n");
break;
case wlan_interface_state_disconnected:
wprintf(L"Not connected\n");
break;
case wlan_interface_state_associating:
wprintf(L"Attempting to associate with a network\n");
break;
case wlan_interface_state_discovering:
wprintf(L"Auto configuration is discovering settings for the network\n");
break;
case wlan_interface_state_authenticating:
wprintf(L"In process of authenticating\n");
break;
default:
wprintf(L"Unknown state %ld\n", pIfInfo->isState);
break;
}
wprintf(L"\n");
dwResult = WlanGetAvailableNetworkList(hClient,
&pIfInfo->InterfaceGuid,
0,
NULL,
&pBssList);
if (dwResult != ERROR_SUCCESS) {
wprintf(L"WlanGetAvailableNetworkList failed with error: %u\n",
dwResult);
dwRetVal = 1;
// You can use FormatMessage to find out why the function failed
} else {
wprintf(L"WLAN_AVAILABLE_NETWORK_LIST for this interface\n");
wprintf(L" Num Entries: %lu\n\n", pBssList->dwNumberOfItems);
for (j = 0; j < pBssList->dwNumberOfItems; j++) {
pBssEntry =
(WLAN_AVAILABLE_NETWORK *) & pBssList->Network[j];
wprintf(L" Profile Name[%u]: %ws\n", j, pBssEntry->strProfileName);
wprintf(L" SSID[%u]:\t\t ", j);
if (pBssEntry->dot11Ssid.uSSIDLength == 0)
wprintf(L"\n");
else {
for (k = 0; k < pBssEntry->dot11Ssid.uSSIDLength; k++) {
wprintf(L"%c", (int) pBssEntry->dot11Ssid.ucSSID[k]);
}
wprintf(L"\n");
}
wprintf(L" BSS Network type[%u]:\t ", j);
switch (pBssEntry->dot11BssType) {
case dot11_BSS_type_infrastructure :
wprintf(L"Infrastructure (%u)\n", pBssEntry->dot11BssType);
break;
case dot11_BSS_type_independent:
wprintf(L"Infrastructure (%u)\n", pBssEntry->dot11BssType);
break;
default:
wprintf(L"Other (%lu)\n", pBssEntry->dot11BssType);
break;
}
wprintf(L" Number of BSSIDs[%u]:\t %u\n", j, pBssEntry->uNumberOfBssids);
wprintf(L" Connectable[%u]:\t ", j);
if (pBssEntry->bNetworkConnectable)
wprintf(L"Yes\n");
else
wprintf(L"No\n");
wprintf(L" Signal Quality[%u]:\t %u\n", j, pBssEntry->wlanSignalQuality);
wprintf(L" Security Enabled[%u]:\t ", j);
if (pBssEntry->bSecurityEnabled)
wprintf(L"Yes\n");
else
wprintf(L"No\n");
wprintf(L" Default AuthAlgorithm[%u]: ", j);
switch (pBssEntry->dot11DefaultAuthAlgorithm) {
case DOT11_AUTH_ALGO_80211_OPEN:
wprintf(L"802.11 Open (%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
case DOT11_AUTH_ALGO_80211_SHARED_KEY:
wprintf(L"802.11 Shared (%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
case DOT11_AUTH_ALGO_WPA:
wprintf(L"WPA (%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
case DOT11_AUTH_ALGO_WPA_PSK:
wprintf(L"WPA-PSK (%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
case DOT11_AUTH_ALGO_WPA_NONE:
wprintf(L"WPA-None (%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
case DOT11_AUTH_ALGO_RSNA:
wprintf(L"RSNA (%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
case DOT11_AUTH_ALGO_RSNA_PSK:
wprintf(L"RSNA with PSK(%u)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
default:
wprintf(L"Other (%lu)\n", pBssEntry->dot11DefaultAuthAlgorithm);
break;
}
wprintf(L" Default CipherAlgorithm[%u]: ", j);
switch (pBssEntry->dot11DefaultCipherAlgorithm) {
case DOT11_CIPHER_ALGO_NONE:
wprintf(L"None (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
case DOT11_CIPHER_ALGO_WEP40:
wprintf(L"WEP-40 (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
case DOT11_CIPHER_ALGO_TKIP:
wprintf(L"TKIP (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
case DOT11_CIPHER_ALGO_CCMP:
wprintf(L"CCMP (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
case DOT11_CIPHER_ALGO_WEP104:
wprintf(L"WEP-104 (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
case DOT11_CIPHER_ALGO_WEP:
wprintf(L"WEP (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
default:
wprintf(L"Other (0x%x)\n", pBssEntry->dot11DefaultCipherAlgorithm);
break;
}
wprintf(L"\n");
}
}
}
}
if (pBssList != NULL) {
WlanFreeMemory(pBssList);
pBssList = NULL;
}
if (pIfList != NULL) {
WlanFreeMemory(pIfList);
pIfList = NULL;
}
return dwRetVal;
}
You can use the DeviceIoControl function with OID_802_11_RSSI to query RSSI.
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