ESP32 で WiFi に接続

SSID, Password をハッシュ化

$ node -e "console.log(require('crypto').pbkdf2Sync('PASSWORD','SSID',4096,32,'sha1').toString('hex'))"

code: arduino

const char* ssid = "SSID";

const char* password = "PASSWORD";

const char* server = "piyo.jp";

// Let's Encrypt の Certificate

const char* root_ca= \

"-----BEGIN CERTIFICATE-----\n" \

"MIIEkjCCA3qgAwIBAgIQCgFBQgAAAVOFc2oLheynCDANBgkqhkiG9w0BAQsFADA/\n" \

"MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT\n" \

"DkRTVCBSb290IENBIFgzMB4XDTE2MDMxNzE2NDA0NloXDTIxMDMxNzE2NDA0Nlow\n" \

"SjELMAkGA1UEBhMCVVMxFjAUBgNVBAoTDUxldCdzIEVuY3J5cHQxIzAhBgNVBAMT\n" \

"GkxldCdzIEVuY3J5cHQgQXV0aG9yaXR5IFgzMIIBIjANBgkqhkiG9w0BAQEFAAOC\n" \

"AQ8AMIIBCgKCAQEAnNMM8FrlLke3cl03g7NoYzDq1zUmGSXhvb418XCSL7e4S0EF\n" \

"q6meNQhY7LEqxGiHC6PjdeTm86dicbp5gWAf15Gan/PQeGdxyGkOlZHP/uaZ6WA8\n" \

"SMx+yk13EiSdRxta67nsHjcAHJyse6cF6s5K671B5TaYucv9bTyWaN8jKkKQDIZ0\n" \

"Z8h/pZq4UmEUEz9l6YKHy9v6Dlb2honzhT+Xhq+w3Brvaw2VFn3EK6BlspkENnWA\n" \

"a6xK8xuQSXgvopZPKiAlKQTGdMDQMc2PMTiVFrqoM7hD8bEfwzB/onkxEz0tNvjj\n" \

"/PIzark5McWvxI0NHWQWM6r6hCm21AvA2H3DkwIDAQABo4IBfTCCAXkwEgYDVR0T\n" \

"AQH/BAgwBgEB/wIBADAOBgNVHQ8BAf8EBAMCAYYwfwYIKwYBBQUHAQEEczBxMDIG\n" \

"CCsGAQUFBzABhiZodHRwOi8vaXNyZy50cnVzdGlkLm9jc3AuaWRlbnRydXN0LmNv\n" \

"bTA7BggrBgEFBQcwAoYvaHR0cDovL2FwcHMuaWRlbnRydXN0LmNvbS9yb290cy9k\n" \

"c3Ryb290Y2F4My5wN2MwHwYDVR0jBBgwFoAUxKexpHsscfrb4UuQdf/EFWCFiRAw\n" \

"VAYDVR0gBE0wSzAIBgZngQwBAgEwPwYLKwYBBAGC3xMBAQEwMDAuBggrBgEFBQcC\n" \

"ARYiaHR0cDovL2Nwcy5yb290LXgxLmxldHNlbmNyeXB0Lm9yZzA8BgNVHR8ENTAz\n" \

"MDGgL6AthitodHRwOi8vY3JsLmlkZW50cnVzdC5jb20vRFNUUk9PVENBWDNDUkwu\n" \

"Y3JsMB0GA1UdDgQWBBSoSmpjBH3duubRObemRWXv86jsoTANBgkqhkiG9w0BAQsF\n" \

"AAOCAQEA3TPXEfNjWDjdGBX7CVW+dla5cEilaUcne8IkCJLxWh9KEik3JHRRHGJo\n" \

"uM2VcGfl96S8TihRzZvoroed6ti6WqEBmtzw3Wodatg+VyOeph4EYpr/1wXKtx8/\n" \

"wApIvJSwtmVi4MFU5aMqrSDE6ea73Mj2tcMyo5jMd6jmeWUHK8so/joWUoHOUgwu\n" \

"X4Po1QYz+3dszkDqMp4fklxBwXRsW10KXzPMTZ+sOPAveyxindmjkW8lGy+QsRlG\n" \

"PfZ+G6Z6h7mjem0Y+iWlkYcV4PIWL1iwBi8saCbGS5jN2p8M+X+Q7UNKEkROb3N6\n" \

"KOqkqm57TH2H3eDJAkSnh6/DNFu0Qg==\n" \

"-----END CERTIFICATE-----\n";

WiFiClientSecure client;

void connectWiFi() {

Serial.print("Attempting to connect to SSID: ");

WiFi.begin(ssid, password);

Serial.print("Wait for WiFi... ");

while(WiFi.status() != WL_CONNECTED) {

Serial.print(".");

delay(1000);

}

Serial.println();

Serial.println("WiFi connected");

Serial.println("IP address: ");

Serial.println(WiFi.localIP());

}

void setup() {

Serial.begin(115200);

delay(100);

Serial.println();

connectWiFi();

client.setCACert(root_ca);

}

void loop() {

Serial.println("\n==================================");

Serial.println("REQUEST_BODY:");

while (!Serial.available()); // 入力待ち

String body = Serial.readString();

Serial.println(body);

// example: name=piyo

Serial.println("\nStarting connection to server...");

if (!client.connect(server, 443)) {

Serial.println("Connection failed!");

return;

}

Serial.println("Connected to server!");

String header = "POST /jikken/esp32/ HTTP/1.1";

client.println(header);

client.println("Host: piyo.jp");

client.println("Accept: */*");

client.println("Content-Length: " + String(body.length()));

client.println("Content-Type: application/x-www-form-urlencoded");

client.println("Connection: close");

client.println();

client.println(body);

while (client.connected()) {

String line = client.readStringUntil('\n');

if (line == "\r") {

Serial.println("headers received");

break;

}

}

while (client.available()) {

char c = client.read();

Serial.write(c);

}

client.stop();

}