ESP8266 Community Forum

Posted: **Tue Jan 17, 2017 9:28 am**

I'm trying to set the TX power when sending a beacon frame.

With the normal code, I can set it with:

Code: Select allWiFi.setOutputPower(21.5);

I want the code to be fast, to make a location based system with a esp sending with high and low TX radio :roll:

.

Now I want to set it im my other code, like:

if(high)
      system_phy_set_rfoption(22.0); 
else
      system_phy_set_rfoption(0.0);

Maybe I have to edit the wifipkt[], but I don't know where to start

Not working

Code: Select all

#include <ESP8266WiFi.h>
 
extern "C" {
  #include "user_interface.h"
}
 
byte channel;
 
int maxssids=10; /* how much SSIDs we have */
char *ssids[] = {
      "One", 
      "Two",  
      "Three",
      "Four",
      "Five",
      "Six",
      "Seven",
      "Eight",
      "Nine",
      "Ten"
      };
 
byte rnd;
byte i;
byte count;
 
 
byte wifipkt[128] = { 0x80, 0x00, 0x00, 0x00, 
                /*4*/   0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
                /*10*/  0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
                /*16*/  0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 
                /*22*/  0xc0, 0x6c, 
                /*24*/  0x83, 0x51, 0xf7, 0x8f, 0x0f, 0x00, 0x00, 0x00, 
                /*32*/  0x64, 0x00, 
                /*34*/  0x01, 0x04, 
                /* SSID */
                /*36*/  0x00};
 
byte pktsuffix[] = {
                        0x01, 0x08, 0x82, 0x84,
                        0x8b, 0x96, 0x24, 0x30, 0x48, 0x6c, 0x03, 0x01, 
                        0x04 };                       
 
void setup() {
  delay(500);
  wifi_set_opmode(STATION_MODE);
  wifi_promiscuous_enable(1); 
}
 
void loop() {
    wifipkt[10] = wifipkt[16] = count; //random(256);
    wifipkt[11] = wifipkt[17] = count; //random(256);
    wifipkt[12] = wifipkt[18] = count; //random(256);
    wifipkt[13] = wifipkt[19] = count; //random(256);
    wifipkt[14] = wifipkt[20] = count; //random(256);
    wifipkt[15] = wifipkt[21] = count; //random(256);
 
    count=37;
 
    rnd=random(maxssids);
     
    wifipkt[count++]=strlen(ssids[rnd]);
    for (i=0; i<strlen(ssids[rnd]); i++) {
      wifipkt[count++]=ssids[rnd][i];
    }
     
    for (i=0; i<sizeof(pktsuffix); i++) {
       wifipkt[count++]=pktsuffix[i];
    }
 
    channel = random(1,12); 
    wifi_set_channel(channel);
    wifipkt[count-1] = channel;
    wifipkt[34] = 127;    
    wifi_send_pkt_freedom(wifipkt, count, 0);
    wifi_send_pkt_freedom(wifipkt, count, 0);
    wifi_send_pkt_freedom(wifipkt, count, 0);
    delay(1);
}

This one it is working, but not with wifi_send_pkt_freedom...

Code: Select all

void setup() {
   delay(1000);
   Serial.begin(115200);
   Serial.println();
   Serial.print("Configuring access point...");
   /* You can remove the password parameter if you want the AP to be open. */
   WiFi.softAP(ssid, password);
  
   IPAddress myIP = WiFi.softAPIP();
   Serial.print("AP IP address: ");
   Serial.println(myIP);
  wifi_set_channel(12);

}

void loop() {
  if(high) {
      WiFi.setOutputPower(21.5);
      wifi_set_channel(1);
  } else {
      WiFi.setOutputPower(0.0);
      wifi_set_channel(12);
  }
   delay(5000);
  high = !high;
}

ESP8266 Community Forum

Set TX power wifi_send_pkt_freedom()

Set TX power wifi_send_pkt_freedom()