relay, switcher, dht backend

app_httpd.cpp

@@ -321,6 +321,13 @@ static esp_err_t stream_handler(httpd_req_t *req){
     return res;
 }
 
+extern void relay(int8_t value);
+extern void switcher(int waitmsec, bool revert = false);
+extern void gettemperature(bool is_dht21 = false);
+extern float humidity;
+extern float temp;
+extern int8_t relay_on;
+
 static esp_err_t cmd_handler(httpd_req_t *req){
     char*  buf;
     size_t buf_len;
@@ -360,6 +367,7 @@ static esp_err_t cmd_handler(httpd_req_t *req){
     int val = atoi(value);
     sensor_t * s = esp_camera_sensor_get();
     int res = 0;
+    char res_s[60] = "";
     if(!strcmp(variable, "framesize")) {
         if(s->pixformat == PIXFORMAT_JPEG) res = s->set_framesize(s, (framesize_t)val);
     }
@@ -428,6 +436,21 @@ static esp_err_t cmd_handler(httpd_req_t *req){
           Serial.print('.');
         }
     }
+    else if(!strcmp(variable, "relay")) {
+        relay(val);
+        sprintf(res_s, "Relay %d", relay_on);
+        Serial.println(res_s);
+    }
+    else if(!strcmp(variable, "switcher")) {
+        switcher(val);
+        sprintf(res_s, "Switcher %d", val);
+        Serial.println(res_s);
+    }
+    else if(!strcmp(variable, "dht")) {
+        gettemperature(val == 1);
+        sprintf(res_s, "Temperature: %.1f&#176;C<br>Humidity: %.0f%s", temp, humidity, "%");
+        Serial.println(res_s);
+    }
     else {
         res = -1;
     }
@@ -435,7 +458,7 @@ static esp_err_t cmd_handler(httpd_req_t *req){
         return httpd_resp_send_500(req);
     }
     httpd_resp_set_hdr(req, "Access-Control-Allow-Origin", "*");
-    return httpd_resp_send(req, NULL, 0);
+    return httpd_resp_send(req, res_s, strlen(res_s));  
 }
 
 static esp_err_t status_handler(httpd_req_t *req){

esp32-cam-webserver.ino

@@ -582,8 +582,7 @@ void WifiSetup() {
               if (mdnsName[k] == '_')
                 break;
             if (k < sizeof(mdnsName)) {
-              int i;
-              for (i = 0; i < sizeof(auto_rename_by_ip3); i++){
+              for (int i = 0; i < sizeof(auto_rename_by_ip3); i++){
                 if (auto_rename_by_ip3[i] == ip[3]) {
                   char s[5];
                   i += 1;

vsc.cpp

@@ -0,0 +1,118 @@
+#include <HTTPClient.h>
+#include <ESP32httpUpdate.h>
+
+#define SWITCH_PIN 2
+#define SWITCH_WAIT 300
+
+#define FIRMWARE_FOLDER "http://192.168.108.43:8080/win/winweb/espfw/cam205/"
+#define FIRMWARE_FILE "esp32_cam205_last.bin"
+
+#define RELAY_PIN 15
+int8_t relay_on = 0;
+
+#include <DHT.h>
+#define DHT_PIN 13
+DHT dht11(DHT_PIN, DHT11);
+DHT dht21(DHT_PIN, DHT21);
+float humidity, temp;  // Values read from sensor
+
+void update() {
+
+  Serial.println("Updating with " FIRMWARE_FILE "...");
+  //stop_httpds();
+  
+  t_httpUpdate_return ret = ESPhttpUpdate.update(FIRMWARE_FOLDER FIRMWARE_FILE);
+
+  switch (ret) {
+    case HTTP_UPDATE_FAILED:
+      Serial.printf("HTTP_UPDATE_FAILED Error (%d): %s\n", ESPhttpUpdate.getLastError(), ESPhttpUpdate.getLastErrorString().c_str());
+      //need_update(false);
+      break;
+
+    case HTTP_UPDATE_NO_UPDATES:
+      Serial.println("HTTP_UPDATE_NO_UPDATES");
+      break;
+
+    case HTTP_UPDATE_OK:
+      Serial.println("HTTP_UPDATE_OK");
+      break;
+  }
+}
+
+void relay(int8_t value) {
+  pinMode(RELAY_PIN, OUTPUT);
+  if(value == -1)
+    relay_on = abs(relay_on - 1);
+  else
+    relay_on = value;
+  if (relay_on > 0)
+    relay_on = 1;
+  else if (relay_on < 0)
+    relay_on = 0;
+  digitalWrite(RELAY_PIN, relay_on);
+}
+
+void switcher(int waitmsec, bool revert = false) {
+  int L0 = 0;
+  int L1 = 1;
+  if (revert) {
+    L0 = 1;
+    L1 = 0;
+  }
+  pinMode(SWITCH_PIN, OUTPUT);
+  digitalWrite(SWITCH_PIN, L1);
+  if (waitmsec > 0) {
+    delay(waitmsec);
+    digitalWrite(SWITCH_PIN, L0);
+  }
+}
+
+unsigned long previousMillis = 0;  // will store last temp was read
+const long interval = 2000;        // interval at which to read sensor
+bool is_dht_inited = false;
+
+void gettemperature(bool is_dht21 = false) {
+
+  if (!is_dht_inited){
+    is_dht_inited = true;
+    if (is_dht21) {
+      dht21.begin();
+    } else {
+      dht11.begin();
+    }
+    delay(1000);
+  }
+
+  // Wait at least 2 seconds seconds between measurements.
+  // if the difference between the current time and last time you read
+  // the sensor is bigger than the interval you set, read the sensor
+  // Works better than delay for things happening elsewhere also
+  unsigned long currentMillis = millis();
+
+  if (currentMillis - previousMillis >= interval) {
+    // save the last time you read the sensor
+    previousMillis = currentMillis;
+
+    // Reading temperature for humidity takes about 250 milliseconds!
+    // Sensor readings may also be up to 2 seconds 'old' (it's a very slow sensor)
+    // Check if any reads failed and exit early (to try again).
+    for (int i = 0; i < 10; i++) {
+      if (is_dht21) {
+        humidity = dht21.readHumidity();      // Read humidity (percent)
+        temp = dht21.readTemperature(false);  // Read temperature as Fahrenheit
+      } else {
+        humidity = dht11.readHumidity();      // Read humidity (percent)
+        temp = dht11.readTemperature(false);  // Read temperature as Fahrenheit
+      }
+
+      if (isnan(humidity) || isnan(temp) || temp > 1000 || humidity > 1000) {
+        delay(500);
+      } else {
+        return;
+      }
+    }
+
+    humidity = 0;
+    temp = 0;
+  }
+}