80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
/*
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* This sketch demonstrates how to scan WiFi networks.
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* The API is almost the same as with the WiFi Shield library,
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* the most obvious difference being the different file you need to include:
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*/
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#include "WiFi.h"
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/* These are the GPIOs connected to the antenna switch on the ESP32-WROOM-DA.
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* Both GPIOs are not exposed to the module pins and cannot be used except to
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* control the antnnas switch.
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*
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* For more details, see the datashhet at:
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* https://www.espressif.com/sites/default/files/documentation/esp32-wroom-da_datasheet_en.pdf
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*/
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#define GPIO_ANT1 2 // GPIO for antenna 1
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#define GPIO_ANT2 25 // GPIO for antenna 2 (default)
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void setup()
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{
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bool err = false;
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Serial.begin(115200);
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// Set WiFi to station mode and disconnect from an AP if it was previously connected
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WiFi.mode(WIFI_STA);
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/* Attention: This is the manual prodecure for the dual antenna configuration.
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* If you choose the ESP32-WROOM-DA module from the Tools -> Board, this configuration
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* is not necessary!
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*
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* Set WiFi dual antenna configuration by passing the GPIO and antenna mode for RX ant TX
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*/
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err = WiFi.setDualAntennaConfig(GPIO_ANT1, GPIO_ANT2, WIFI_RX_ANT_AUTO, WIFI_TX_ANT_AUTO);
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/* For more details on how to use this feature, see our docs:
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* https://docs.espressif.com/projects/arduino-esp32/en/latest/api/wifi.html
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*/
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if(err == false) {
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Serial.println("Dual Antenna configuration failed!");
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} else {
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Serial.println("Dual Antenna configuration successfuly done!");
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}
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WiFi.disconnect();
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delay(100);
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Serial.println("Setup done");
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}
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void loop()
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{
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Serial.println("scan start");
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// WiFi.scanNetworks will return the number of networks found
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int n = WiFi.scanNetworks();
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Serial.println("scan done");
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if (n == 0) {
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Serial.println("no networks found");
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} else {
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Serial.print(n);
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Serial.println(" networks found");
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for (int i = 0; i < n; ++i) {
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// Print SSID and RSSI for each network found
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Serial.print(i + 1);
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Serial.print(": ");
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Serial.print(WiFi.SSID(i));
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Serial.print(" (");
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Serial.print(WiFi.RSSI(i));
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Serial.print(")");
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Serial.println((WiFi.encryptionType(i) == WIFI_AUTH_OPEN)?" ":"*");
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delay(10);
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}
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}
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Serial.println("");
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// Wait a bit before scanning again
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delay(5000);
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}
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