add thingspeak

09_thingspeak_randomnum/.gitignore

@@ -0,0 +1,5 @@
+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

09_thingspeak_randomnum/.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

09_thingspeak_randomnum/platformio.ini

@@ -0,0 +1,15 @@
+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:esp32dev]
+platform = espressif32
+board = esp32dev
+framework = arduino
+monitor_speed = 115200

09_thingspeak_randomnum/src/main.cpp

@@ -0,0 +1,76 @@
+#include <Arduino.h>
+#include <WiFi.h>
+#include <HTTPClient.h>
+
+const char* ssid = "tksteti";
+const char* password = "ProsimTeNevim";
+
+const char* serverName = "api.thingspeak.com";
+const String apiKey = "DJFN3ZJGKAO5BXMJ";
+
+const int ledPin = 2;
+
+const char* hostname = "ESP-Thingspeak-Skrabanek";
+
+//přidat deklaraci kvuli C++ pro zajištění "existence" nové metody
+void sendData2ThingSpeak(int value);
+
+void setup() {
+  Serial.begin(115200);
+  pinMode(ledPin, OUTPUT);
+
+  WiFi.hostname(hostname);
+
+  WiFi.begin(ssid,password);
+  while (WiFi.status() != WL_CONNECTED)
+  {
+    Serial.print(".");
+    delay(400);
+  }
+  Serial.println("\nWiFi připojena");
+  Serial.print("IP adresa: ");
+  Serial.println(WiFi.localIP());
+  Serial.print("hostname:");
+  Serial.println(WiFi.getHostname());
+  
+}
+
+void loop() {
+  int randomValue = random(0,101);
+  Serial.print("Nahodne cislo: ");
+  Serial.println(randomValue);
+
+  digitalWrite(ledPin, HIGH);
+  sendData2ThingSpeak(randomValue);
+  digitalWrite(ledPin,LOW);
+
+  delay(5000);
+}
+
+void sendData2ThingSpeak(int value) {
+  if (WiFi.status() == WL_CONNECTED) {
+    Serial.println("WiFi připojeno");
+    HTTPClient http;
+    String url = "http://";
+    url += serverName;
+    url += "/update?api_key=";
+    url += apiKey;
+    url += "&field1="; //AltGR+C=&
+    url += value;
+    Serial.println(url);
+    http.begin(url);
+    int httpResponseCode = http.GET();
+    if (httpResponseCode > 0) {
+      Serial.print("HTTP Response code:");
+      Serial.println(httpResponseCode);
+      //vypsat odpověd
+      String payload = http.getString();
+      Serial.println(payload);
+    } else {
+      Serial.print("Error code: ");
+      Serial.println(httpResponseCode);
+    }
+  } else {
+    Serial.println("WiFi odpojeno");
+  }
+}

09_thingspeak_randomnum/test/README

@@ -0,0 +1,11 @@
+
+This directory is intended for PlatformIO Test Runner and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/en/latest/advanced/unit-testing/index.html