ESP8266 Community Forum

- Wed Oct 28, 2015 8:14 pm #32502 Hi, I'll have a go at some code.

- Thu Oct 29, 2015 5:39 am #32529 Use the ticker library to do a scan at a set interval, for example every 2 seconds, if your access point is found in the returned list fetch Rssi and then calculate bleeps based on value. If you use the ticker set a flag on event callback and process flag in main loop.

This is pretty easy coding, If I was not so busy I would knock this up for you, would not take longer than an hour or so to implement and test.

Regards

Dans

- Thu Oct 29, 2015 12:18 pm #32563 Hi, try this:

Code: Select all#include "ESP8266WiFi.h"
const char* ssid = "<your ssid>";
const char* password = "<your password>";
int pin2 = 2;

void setup() {
  pinMode(2,OUTPUT);
  digitalWrite(pin2,HIGH);
  Serial.begin(9600);  //debug

  // Set WiFi to station mode and disconnect from an AP if it was previously connected
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  delay(100);
  Serial.println("Void Setup Done"); // debug
}
// Connects to station.
void loop() {
    unsigned long TL1S = millis(); // debug
     while (WiFi.status() ==! WL_CONNECTED){
      WiFi.begin(ssid,password);
      digitalWrite(pin2,LOW); //LED ON
      delay(900);
      digitalWrite(pin2,HIGH);  //LED OFF
      delay(100);
      Serial.println("Not Connected");  //debug
      }
      // Waits for first RSSI value to be returned (don't comment out).
      while (WiFi.RSSI() > 0){
        delay(100);
     }
     unsigned long TL1E = millis(); // debug

     // Times above loop and prints out any delay
     Serial.print("WiFi loop took "); // debug
     Serial.print(TL1E - TL1S); // debug
     Serial.println("ms"); // debug

   // Puts output on for 100ms then off for time dependant on signal
   digitalWrite(pin2,LOW); //LED ON
   delay(100);
   digitalWrite(pin2,HIGH); //LED OFF
   unsigned long rssi = ((WiFi.RSSI())*-10);
   delay(rssi);

   // Prints out values for RSSI and when converted to delay rssi
   Serial.print("RSSI = "); // debug
   Serial.print(WiFi.RSSI()); // debug
   Serial.print("   rssi = "); // debug
   Serial.println(rssi); // debug
   Serial.println(""); // debug
   
}
 

If you put an LED between 3.3V and GPIO 2 it will flash.
Connecting: 900ms on, 100ms off.
Week signal: 100ms on, upto 1000ms off.
Strong signal; 100ms on, down to 0ms off.

I tried to do this without connecting but scans or filtering was taking 2500 to 3500ms, making the responce to slow to be usefull.

Last edited by Barnabybear on Thu Oct 29, 2015 2:08 pm, edited 4 times in total.

- Thu Oct 29, 2015 1:28 pm #32572 @Barnabybear I just tried your code, it blinks once on power up, then stays off from then onwards.