Code refactoring, add ESP8266HTTPClient and WiFiClientSecureBearSSL libs

Author: Sgoldik

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "C_Cpp.errorSquiggles": "Disabled"
+}

README.md

@@ -53,6 +53,7 @@ Connection diagram for ESP8266 firmware:
 |VCC|5v  |
 |SDA|A4  |
 |SCL|A5 |
+
 Update Arduino Uno firmware:
 
 1. Open the **/main/main.ino** file

api/api.ino

@@ -1,25 +1,25 @@
 #include <ArduinoJson.h>
 #include <ESP8266WiFi.h>
+#include <ESP8266HTTPClient.h>
+#include <WiFiClientSecureBearSSL.h>
 
 const char* ssid = "TP-Link_408";
 const char* password = "84570550";
 
-#define CD_API "/v1/bpi/currentprice.json"
-#define CD_URL "api.coindesk.com"
-
-static char respBuffer[4096];
-WiFiClient client;
+#define API "https://api.coindesk.com/v1/bpi/currentprice.json"
 
 void setup() {
   Serial.begin(115200);
   delay(10);
   Serial.print("Connecting to ");
   Serial.println(ssid);
   WiFi.begin(ssid, password);
+
   while (WiFi.status() != WL_CONNECTED) {
     delay(500);
     Serial.print(".");
   }
+
   Serial.println("WiFi connected");
   Serial.print("IP address: ");
   Serial.println(WiFi.localIP());
@@ -31,41 +31,32 @@ void loop() {
 }
 
 void getData() {
-  const char request[] =
-  "GET " CD_API " HTTP/1.1\r\n"
-  "User-Agent: ESP8266/0.1\r\n"
-  "Accept: */*\r\n"
-  "Host: " CD_URL "\r\n"
-  "Connection: close\r\n"
-  "\r\n";
-  delay(100);
-
-  if (!client.connect(CD_URL, 80)) {
-    Serial.println("Connection failed");
-    return;
-  }
-
-  client.print(request);
-  client.flush();
-  delay(1000);
-  uint16_t index = 0;
-  while(client.connected() || client.available()) {
-    if(client.available()) {
-      respBuffer[index++] = client.read();
-      delay(1);
+  std::unique_ptr<BearSSL::WiFiClientSecure>client(new BearSSL::WiFiClientSecure);
+  
+  client->setInsecure();
+  HTTPClient http;
+
+  if (WiFi.status() == WL_CONNECTED) {
+ 
+    HTTPClient http;
+ 
+    http.begin(*client, API);
+    int httpCode = http.GET();
+ 
+    if (httpCode > 0) {
+ 
+      String payload = http.getString();
+      String json_str = String(payload);
+      DynamicJsonDocument doc(1024);
+      DeserializationError error = deserializeJson(doc, payload);
+      
+      JsonObject bpi = doc["bpi"];
+      JsonObject usd = bpi["USD"];
+      String rate_float = usd["rate_float"];
+    
+      Serial.print(rate_float); 
     }
+ 
+    http.end();
   }
-
-  char * json = strchr(respBuffer,'{');
-  String json_str = String(json);
-  uint16_t idx_d = json_str.lastIndexOf('d');
-  json_str.remove(idx_d,3);
-  DynamicJsonDocument doc(1024);
-  DeserializationError error = deserializeJson(doc, json);
-
-  JsonObject bpi = doc["bpi"];
-  JsonObject usd = bpi["USD"];
-  String rate_float = usd["rate_float"];
-
-  Serial.print(rate_float);
 }