signal-strength

问题 I'm new to iOS, and am learning to code with Swift. My app needs to measure the signal strength. I've found this code working on Objective-C/C, and need some help to implement on Swift. Here is what I got. Hope someone can help me finish it. OBJECTIVE C int getSignalStrength() { void *libHandle = dlopen("/System/Library/Frameworks/CoreTelephony.framework/CoreTelephony", RTLD_LAZY); int (*CTGetSignalStrength)(); CTGetSignalStrength = dlsym(libHandle, "CTGetSignalStrength"); if(

问题 Is this even possible? If not I'm really surprised this hasn't been open thru the API yet. 回答1: Apple doesn't allow the use of low level network/wifi/cellular api's. Interestinlgy during a previous period, there were apps in the app store that made use of private apis (a few WIFI-Scanners for example). They've all been banded from the appStore by now, as far as I know at least. Also the newly available (since iOS 4) core telephony framework doesn't offer any methods or properties to serve you

问题 Is this even possible? If not I'm really surprised this hasn't been open thru the API yet. 回答1: Apple doesn't allow the use of low level network/wifi/cellular api's. Interestinlgy during a previous period, there were apps in the app store that made use of private apis (a few WIFI-Scanners for example). They've all been banded from the appStore by now, as far as I know at least. Also the newly available (since iOS 4) core telephony framework doesn't offer any methods or properties to serve you

问题 I would like to show the the signal strength in dbm. But with my code i always become the result -1. But when i see the signal strength in the settings it's around -81.. Can you find a mistake? thank you! public class MainActivity extends Activity implements OnClickListener { TextView dateAndTimeLabel; private int signalDBM = 0; public class GetParams extends PhoneStateListener { @Override public void onSignalStrengthsChanged(SignalStrength signalStrength) { super.onSignalStrengthsChanged

问题 Ideally I would like to monitor the signal strength of a wireless network in near real-time, say every 100ms, but such a high frequency is probably overkill. I'm using the Managed Wifi library to poll RSSI. I instantiate a WlanClient client = new WlanClient(); once and re-use that client to measure signal strengths every second or so (but I'd like to do it more often): foreach (WlanClient.WlanInterface wlanInterface in _client.Interfaces) { Wlan.WlanBssEntry[] wlanBssEntries = wlanInterface

问题 I need to find a way to measure the current signal strength of Android phone, without the need to register a PhoneStateListener that God knows when it returns the actual asu. something like: int signal = getPhoneSignal(); any help plz? thanks! 回答1: If you will have a closer look on Android sources you will see that after registering PhoneStateListener you will have instant notification: public void listen(PhoneStateListener listener, int events) { String pkgForDebug = mContext != null ?

问题 i curious why i get wrong value to get carrier name and signal strength. Here the code. CTTelephonyNetworkInfo *netinfo = [[CTTelephonyNetworkInfo alloc] init]; CTCarrier *car = [netinfo subscriberCellularProvider]; NSLog(@"Carrier Name: %@", car.carrierName); [netinfo release]; Why i get value "carrier" instead of carrier i use? this is code to get signal strength void *libHandle = dlopen("/System/Library/Frameworks/CoreTelephony.framework/CoreTelephony", RTLD_LAZY); int (

问题 I got this code that i want to scan for the networks and then write it all to the listview. But the problem is that the ssid and bssid doesnt show. Everything else shows but not the ssid. Also what is the best way to update the listview every second so you can see the signal strenghts actual signal? import java.util.List; import android.annotation.SuppressLint; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent;

问题 This is the code I have so far that gathers the strength value, but when I try to print it in the main activity the emulator does not open the app. How would I fix this? My emulator is in API 29. On the emulator, it simply opens and then goes back to the home screen. I am also unsure of what to declare context to in the main. I currently have it set to null. My goal is to get the cellular signal strength from a cell phone and have this update multiple times every second within an app that I

问题 I looked through internet and couldn't find a clear and concise answer to my question. I want to know what'll happen if I drive same strength signals onto the same wire, one of them being logic 1 and the other being logic 0? What do I do if I want a signal to "win", for lack of a better word, depending on the situation? 回答1: Based on your comment, it sounds like you want a three-state bus. The basic structure to drive a three-state bus is: assign bus = enable ? out : 1'bz; Each module driving