This post is based mostly on Installing ESP32 Board in Arduino IDE 2 (Windows, Mac OS X, Linux) | Random Nerd Tutorials it is a good resource to get started on verify the ESP32-WROVER is working.
The hardest part is to determine what are the connector chip and installing libraries into Arduino IDE. Refer to the shared link in the beginning of this post.
Code from DeepSeek for a complicated hello world, assuming to make the LED blinks in morse code:
#include <Arduino.h>
#define LED_PIN 2 // Built-in LED on GPIO 2
// Morse code representations for A-Z
const char* morseCodes[] = {
".-", // A
"-...", // B
"-.-.", // C
"-..", // D
".", // E
"..-.", // F
"--.", // G
"....", // H
"..", // I
".---", // J
"-.-", // K
".-..", // L
"--", // M
"-.", // N
"---", // O
".--.", // P
"--.-", // Q
".-.", // R
"...", // S
"-", // T
"..-", // U
"...-", // V
".--", // W
"-..-", // X
"-.--", // Y
"--.." // Z
};
void setup() {
pinMode(LED_PIN, OUTPUT); // Set the LED pin as an output
Serial.begin(115200);
}
void loop() {
String message = "SOS"; // Message to transmit in Morse code
message.toUpperCase(); // Convert message to uppercase
// Transmit the message in Morse code
for (int i = 0; i < message.length(); i++) {
char currentChar = message[i];
if (currentChar >= 'A' && currentChar <= 'Z') {
transmitMorse(morseCodes[currentChar - 'A']); // Transmit Morse code for the character
} else if (currentChar == ' ') {
delay(1400); // Gap between words (7 units)
}
delay(600); // Gap between letters (3 units)
}
delay(2000); // Wait before repeating the message
}
// Function to transmit a Morse code pattern
void transmitMorse(const char* morseCode) {
for (int i = 0; i < strlen(morseCode); i++) {
if (morseCode[i] == '.') {
blinkDot(); // Transmit a dot
} else if (morseCode[i] == '-') {
blinkDash(); // Transmit a dash
}
delay(200); // Gap between dots/dashes (1 unit)
}
}
// Function to blink a dot (short flash)
void blinkDot() {
digitalWrite(LED_PIN, HIGH); // Turn the LED on
delay(200); // Dot duration (1 unit)
digitalWrite(LED_PIN, LOW); // Turn the LED off
}
// Function to blink a dash (long flash)
void blinkDash() {
digitalWrite(LED_PIN, HIGH); // Turn the LED on
delay(600); // Dash duration (3 units)
digitalWrite(LED_PIN, LOW); // Turn the LED off
}Code to connect to WiFi:
#include <WiFi.h>
// Replace with your network credentials
const char* ssid = "myhome4iot";
const char* password = "i have the longest wifi password ever";
void setup() {
Serial.begin(115200);
// Connect to Wi-Fi
WiFi.begin(ssid, password);
Serial.println("Connecting to Wi-Fi...");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.print(".");
}
// Connection successful
Serial.println("\nWi-Fi connected!");
// Get and print network information
IPAddress ip = WiFi.localIP();
IPAddress gateway = WiFi.gatewayIP();
IPAddress dns = WiFi.dnsIP();
Serial.println("Network Information:");
Serial.print("IP Address: ");
Serial.println(ip);
Serial.print("Gateway: ");
Serial.println(gateway);
Serial.print("DNS Server: ");
Serial.println(dns);
}
void loop() {
// Nothing to do here
}
Code to scan WiFi:
#include <WiFi.h>
void setup() {
Serial.begin(115200);
// Set ESP32 to station mode
WiFi.mode(WIFI_STA);
WiFi.disconnect(); // Disconnect from any previous connection
delay(100);
Serial.println("Starting Wi-Fi scan...");
}
void loop() {
// Scan for nearby Wi-Fi networks
int numNetworks = WiFi.scanNetworks();
if (numNetworks == 0) {
Serial.println("No networks found.");
} else {
Serial.print(numNetworks);
Serial.println(" networks found:");
for (int i = 0; i < numNetworks; i++) {
// Print SSID and RSSI for each network
Serial.print(i + 1);
Serial.print(": ");
Serial.print(WiFi.SSID(i)); // SSID
Serial.print(" (");
Serial.print(WiFi.RSSI(i)); // Signal strength (RSSI)
Serial.print(" dBm)");
Serial.print(" [");
Serial.print(getEncryptionType(WiFi.encryptionType(i))); // Encryption type
Serial.println("]");
}
}
Serial.println("-----------------------------");
delay(10000); // Wait 10 seconds before scanning again
}
// Function to convert encryption type to a human-readable string
String getEncryptionType(wifi_auth_mode_t encryptionType) {
switch (encryptionType) {
case WIFI_AUTH_OPEN:
return "Open";
case WIFI_AUTH_WEP:
return "WEP";
case WIFI_AUTH_WPA_PSK:
return "WPA";
case WIFI_AUTH_WPA2_PSK:
return "WPA2";
case WIFI_AUTH_WPA_WPA2_PSK:
return "WPA/WPA2";
case WIFI_AUTH_WPA2_ENTERPRISE:
return "WPA2 Enterprise";
case WIFI_AUTH_WPA3_PSK:
return "WPA3";
case WIFI_AUTH_WPA2_WPA3_PSK:
return "WPA2/WPA3";
default:
return "Unknown";
}
}Unfortunately, due to the ESP32-WROVER hardware limitation, any modern 5GHz WiFi will not be able to be scanned or detected. On top of that, the stock ESP32-WROVER-IE needs to have a actual wifi cable to extend its range.
