Cant set the tx Power

[Andidas]

Hello I'm trying to make an AP for indoor tracking with an ESP32 Dev.

I want to place some AP in a room who are there for a device to collect their MAC and RSSI.
That device sends the 3 nearest and strongest MACs with the RSSI to a Server which calculates the approximately location.

Now I want to reduce the TX Power to maybe get a more accurate location and hopefully no interference with an AP from a other room.
But when I try to set the TX Power nothing happens and it stays on the default power.

I don't really know where i have to set TX Power or if I am doing it right.

Code: Select all

#include <WiFi.h>
  
const char *ssid = "ESP32ap";       //SSID wird angelegt
const char *password = "12345678";  //Passwort wird angelegt

/*
//Set Static IP address
IPAddress local_IP(192, 168, 1, 184);
//Set Static Gateway IP address
IPAddress gateway(192, 168, 1, 1);
//Set Static Subnet IP address
IPAddress subnet(255, 255, 0, 0);


IPAddress primaryDNS(8, 8, 8, 8);   // optional
IPAddress secondaryDNS(8, 8, 4, 4); // optional
*/


void WiFiEvent(WiFiEvent_t event){
  Serial.printf("[WiFi-event] event: %d\n", event);

    //Legt die Ausgaben für Events fest
    switch (event){
      case SYSTEM_EVENT_AP_START:
        Serial.println("WiFi access point started");
        Serial.println();
        break;
      case SYSTEM_EVENT_AP_STOP:
        Serial.println("WiFi access point  stopped");
        Serial.println();
        break;
      case SYSTEM_EVENT_AP_STACONNECTED:
        Serial.println("Client connected");
        Serial.println();
        break;
      case SYSTEM_EVENT_AP_STADISCONNECTED:
        Serial.println("Client disconnected");
        Serial.println();
        break;
      case SYSTEM_EVENT_AP_STAIPASSIGNED:
        Serial.println("Assigned IP address to client");
        Serial.println();
        break;
      case SYSTEM_EVENT_AP_PROBEREQRECVED:
        Serial.println("Received probe request");
        Serial.println();
        break;
      default: break;
    }
}

void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.println("Configuring access point...");

  //Setzt den ESP32 in Access Point Mode und legt ssid und passwort fest
  /* You can remove the password parameter if you want the AP to be open. */
  WiFi.mode(WIFI_AP);
  WiFi.softAP(ssid, password);

  //Ausgabe der SSID
  Serial.println();
  Serial.print("AP SSID: ");
  Serial.println(ssid);

  WiFi.setTxPower(WIFI_POWER_2dBm);

  //Nimmt die IP-Addresse vom ESP32 und gibt diese aus
  IPAddress myIP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(myIP);

  //Ausgabe der MAC
  Serial.print("AP MAC address: ");
  Serial.println(WiFi.softAPmacAddress());

  //Signalstärke
  Serial.print("Signalstärke: ");
  wifi_power_t tx_power;
  tx_power=WiFi.getTxPower();
  Serial.println(tx_power);

  //Gibt Meldungen bei dem jeweiligen Event aus
  WiFi.onEvent(WiFiEvent);
  Serial.println();
}

void loop() {
  
  /*
  //Clients
  Serial.print("Clients: ");
  Serial.println(WiFi.softAPgetStationNum());
  delay(20000);
  */
}

[ullixesp]

Very strange. I am using the same commands, and they do work fine. The one difference I see: I am using the STA mode, while you are using the AP mode.

Would be weird, if this were the cause, but who knows ...