Wifi android signal strength

Getting WiFi signal strength in Android

It gives negative value. When we see the default system WiFi setting and clicked on the connected WiFi network, it gives «Good» or «Bad» as signal strength. What is the range that we can filter those negative vales as «Good» signal strength or «Bad» signal strength?

Yes, that is true. What I need is a standard range that I can apply for my own WiFi handling Android app. When I click on the connected WiFi network on a real device, it gives me «Good» as Signal strength. I want to know how they measure it as a «Good» strength. Thanks for the reply.

7 Answers 7

its an old post but this might help someone.

WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); int numberOfLevels = 5; WifiInfo wifiInfo = wifiManager.getConnectionInfo(); int level = WifiManager.calculateSignalLevel(wifiInfo.getRssi(), numberOfLevels); 

Please check how dBm values for received Wireless Signal power are represented.

WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); // Level of a Scan Result List wifiList = wifiManager.getScanResults(); for (ScanResult scanResult : wifiList) < int level = WifiManager.calculateSignalLevel(scanResult.level, 5); System.out.println("Level is " + level + " out of 5"); >// Level of current connection int rssi = wifiManager.getConnectionInfo().getRssi(); int level = WifiManager.calculateSignalLevel(rssi, 5); System.out.println("Level is " + level + " out of 5"); 

Hi @se_bastiaan the max level is 4 & min level is 0 (therefore 5 levels). Your log will never read «5 out of 5».

Yes, exactly. This is how dBm values for received signal power are represented. Here are some details at Wikipedia.

-100 means lowest value (no signal at all), and 0 means extremely good signal (100%)

@Thomas what a nonsense. Did you even check linked Wikipedia page or try to research it yourself before making this statement?

Unlinke you I seem to know a little bit more about wireless system it seems, otherwise you wouldn’t have written «non-sense». Your Wikipedia link only lists the transmit power of radio stations and so on. Also -100 isn’t the lowest value . GSM for example still works below -100 dBm.

I downvoted this now because this answer about the received signal strength (RSSI) is totally wrong. Please do some research. This answer here: stackoverflow.com/a/33689523/1392778 is correct.

RSSI = -100 does NOT mean no signal. It means received signal power is 100 dB below 1 mW. Yes, this may mean practically a useless signal. No, this does NOT mean «no signal». Similarly, extremely good signal does not mean 100%. There is no defined 100% signal. 100 % of what? Four bars out of four is just a GUI, but does not mean «100%». This answer is not useful. -1

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How to get signal strength of connected WiFi android?

I want to get signal strength of this wifi which is connected with my device. This is probably easy. But I am beginner. And It’s homework. How to get it? I tried this code. But it doesn’t work.

 registerReceiver(new BroadcastReceiver() < @Override public void onReceive(Context context, Intent intent) < final WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE); int state = wifi.getWifiState(); if(state == WifiManager.WIFI_STATE_ENABLED) < Listresults = wifi.getScanResults(); for (ScanResult result : results) < if(result.BSSID.equals(wifi.getConnectionInfo().getBSSID())) < int level = WifiManager.calculateSignalLevel(wifi.getConnectionInfo().getRssi(), result.level); int difference = level * 100 / result.level; int signalStrangth= 0; if(difference >= 100) signalStrangth = 4; else if(difference >= 75) signalStrangth = 3; else if(difference >= 50) signalStrangth = 2; else if(difference >= 25) signalStrangth = 1; tv.setText(tv.getText() + "\nDifference :" + difference + " signal state:" + signalStrangth); > > > > >, new IntentFilter(WifiManager.RSSI_CHANGED_ACTION)); 

 int numberOfLevels = 5; WifiInfo wifiInfo = wifiManager.getConnectionInfo(); int level = WifiManager.calculateSignalLevel(wifiInfo.getRssi(), numberOfLevels); 

2 Answers 2

public void onReceive(WifiManager wifiManager) < int numberOfLevels=5; WifiInfo wifiInfo = wifiManager.getConnectionInfo(); int level=WifiManager.calculateSignalLevel(wifiInfo.getRssi(), numberOfLevels); System.out.println("Bars mt24"> 
 
 
 
 
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answered Dec 28, 2013 at 18:27 
 
 
 
 
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