A look at the ESP32 PICO KIT development board

Testing

Add the ESP32 package using the Arduino IDE as per the steps below

https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json

Starting with 1.6.4, Arduino allows installation of third-party platform packages using Boards Manager. We have packages available for Windows, Mac OS, and Linux (32, 64 bit and ARM).

• Install the current upstream Arduino IDE at the 1.8 level or later. The current version is at the Arduino website.
• Start Arduino and open Preferences window.
• Enter one of the release links above into Additional Board Manager URLs field. You can add multiple URLs, separating them with commas.
• Open Boards Manager from Tools > Board menu and install esp32 platform (and don't forget to select your ESP32 board from Tools > Board menu after installation).

You will see the ESP32 Pico Kit listed in the ESP32 Arduino list

I used the WifiScan example, this is a hello world type example for detecting Wifi networks nearby

[codesyntax lang=”cpp”]

#include "WiFi.h"

void setup()
{
    Serial.begin(115200);

    // 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("Setup done");
}

void loop()
{
    Serial.println("scan start");

    // WiFi.scanNetworks will return the number of networks found
    int n = WiFi.scanNetworks();
    Serial.println("scan done");
    if (n == 0) {
        Serial.println("no networks found");
    } else {
        Serial.print(n);
        Serial.println(" networks found");
        for (int i = 0; i < n; ++i) {
            // Print SSID and RSSI for each network found
            Serial.print(i + 1);
            Serial.print(": ");
            Serial.print(WiFi.SSID(i));
            Serial.print(" (");
            Serial.print(WiFi.RSSI(i));
            Serial.print(")");
            Serial.println((WiFi.encryptionType(i) == WIFI_AUTH_OPEN)?" ":"*");
            delay(10);
        }
    }
    Serial.println("");

    // Wait a bit before scanning again
    delay(5000);
}

[/codesyntax]

The output was

scan start
scan done
2 networks found
1: mynetwork1(-63)*
2: mynetwork2(-74)*

Parts List

The board comes in it under $14

ESP32-PICO-KIT ESP32 SiP development board with PICO-D4 male / female