client portierung auf esp32-s3 hinzu

source/client/esp32-s3/statusclient/statusclient.ino

@@ -0,0 +1,188 @@
+/**
+ *
+ */
+#include <time.h>
+#include <WiFi.h>
+#include <Arduino.h>
+#include <ESP_SSLClient.h>
+#include "config.h"
+#include "certs.h"
+#include "credentials.h"
+
+
+enum door_state {
+    /*
+     */
+    CLOSED = '0',
+    OPEN = '1'
+};
+door_state new_door_state = CLOSED;
+door_state current_door_state = CLOSED;
+WiFiClient basic_client;
+ESP_SSLClient ssl_client;
+
+
+void display_info() {
+    /*
+     * ausgabe einiger infos tum device. ich verstehe allerdings die
+     * for-schleife nicht.
+     */
+    uint32_t chipId = 0;
+
+    for (int i = 0; i < 17; i = i + 8) {
+        chipId |= ((ESP.getEfuseMac() >> (40 - i)) & 0xff) << i;
+    }
+    Serial.printf("\nESP32 Chip model = %s Rev %d\n", ESP.getChipModel(),
+                  ESP.getChipRevision());
+    Serial.printf("This chip has %d cores\n", ESP.getChipCores());
+    Serial.print("Chip ID: ");
+    Serial.println(chipId);
+    Serial.print(" ");
+}
+
+void init_wifi() {
+    /*
+     */
+    int counter = 0;
+    Serial.print("Connecting to wifi ");
+    Serial.print(WIFI_SSID);
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
+    while (WiFi.status() != WL_CONNECTED)
+    {
+        delay(500);
+        Serial.print(".");
+        counter++;
+        if (counter >= 180) {
+            Serial.println(" Failed");
+            ESP.restart();
+        }
+    }
+    Serial.println(" Connected");
+    Serial.print("IP: ");
+    Serial.println(WiFi.localIP());
+    Serial.print("Strength: ");
+    Serial.println(WiFi.RSSI());
+}
+
+void set_clock() {
+    /*
+     * We need time for certificate authorization
+     */
+    Serial.print("Fetch time from ");
+    Serial.println(NTP_URL);
+    configTime(GTM_OFFSET_SEC, DAYLIGHT_OFFSET_SEC, NTP_URL);
+    printLocalTime();
+}
+
+void printLocalTime() {
+    /*
+     */
+    struct tm timeinfo;
+    if (!getLocalTime(&timeinfo)) {
+        Serial.println("Failed to obtain time");
+        return;
+    }
+    Serial.printf("%s\n", asctime(&timeinfo));
+}
+
+void set_ssl() {
+    /*
+     */
+    // ssl_client.setTimeout(120); 
+    // ssl_client.setSessionTimeout(0); 
+    ssl_client.setDebugLevel(SSL_DEBUG_LEVEL);
+    ssl_client.setClient(&basic_client, false);
+    ssl_client.setSSLVersion(BR_TLS12, BR_TLS12);
+    ssl_client.setCACert(CA_CERTS);
+    ssl_client.setCertificate(CLIENT_CERT);
+    ssl_client.setPrivateKey(CLIENT_KEY);
+
+}
+
+door_state read_door_state() {
+    /* 
+     *  die initialisierung des reed-switch-pins mit pullup bewirkt, dass am pin
+     *  3,3 volt anliegen. die verbindung des pins mit GND sorgt dafür,
+     *  dass die spannung "abfließen" kann. dadurch hat der pin dann den
+     *  status 'low'. die option geht leider nur mit der bibliothek für den
+     *  esp8862.
+     *  geschlossene tür -> reed geschlossen -> low
+     *  geöffnete tür -> reed offen -> high
+     */
+    if (digitalRead(REED_PIN) == HIGH) {
+        return OPEN;
+    }
+    return CLOSED;
+}
+
+bool send_status(door_state state) {
+    /*
+     * param 1: door_state
+     * returns: boolean
+     *
+     * needs error handling
+     */
+    int32_t response = 0;
+    int counter = 0;
+
+    // connect to server
+    Serial.print("Connecting to server ");
+    Serial.print(SERVER_URL);
+    Serial.print(" ... ");
+    if (ssl_client.connect(SERVER_URL, SERVER_PORT)) {
+        Serial.println(" ok");
+        Serial.print("Upgrade to HTTPS...");
+        if (!ssl_client.connectSSL())
+        {
+            Serial.println(" failed\r\n");
+            return false;
+        }
+        Serial.println(" ok");
+        // send new status
+        Serial.print("Send new status ... ");
+        response = ssl_client.write(current_door_state);
+        ssl_client.flush();
+        Serial.print("Bytes written: ");
+        Serial.println(response);
+
+        Serial.print("Read response...");
+        Serial.print((char)ssl_client.read());
+        Serial.println();
+    } else {
+        Serial.println(" failed\n");
+        ssl_client.stop();
+        return false;
+    }
+    ssl_client.stop();
+    return true;
+}
+
+void setup() {
+    /*
+     */
+    Serial.begin(115200);
+    Serial.println("------------- setup -------------");
+    display_info();
+    init_wifi();
+    set_clock();
+    set_ssl();
+    Serial.println("-------- setup finished ---------");
+}
+
+void loop() {
+    /*
+     */
+    new_door_state = read_door_state();
+    if (new_door_state != current_door_state) {
+        Serial.print("Status has changed to ");
+        Serial.println(new_door_state);
+        if (send_status(new_door_state)) {
+            current_door_state = new_door_state;
+            Serial.println("Door status send successful");
+        } else {
+            Serial.println("Failed to send new door status");
+        }
+    }
+    delay(FREQUENCY);
+}