Reading json response using ESP 8266 over an HTTPs connection

[aritra0723]

Basic Infos

0down votefavorite | I am trying to read I am trying to read the json response over the HTTPS connection from googles direction API and display the response on my serial monitor of an ESP8266 12E. I am able to connect to wifi and also google maps api. But while reading the values all I am getting is Garbage value.

Hardware

Hardware: ?ESP-12?
Core Version: ?2.1.0-rc2?

Description

Problem description

Settings in IDE

Module: ?Generic ESP8266 Module?
Flash Size: ?4MB/1MB?
CPU Frequency: ?80Mhz?
Flash Mode: ?qio?
Flash Frequency: ?40Mhz?
Upload Using: ?OTA / SERIAL?
Reset Method: ?ck / nodemcu?

Sketch

#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>

const char* ssid = "NETGEAR90";
const char* password = "thirstychair027";

const char* host = "https://maps.googleapis.com";
const int httpsPort = 443;

void setup() {
Serial.begin(115200);
Serial.println();
Serial.print("connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());

// Use WiFiClientSecure class to create TLS connection
WiFiClientSecure client;
Serial.print("connecting to ");
Serial.println(host);
if (client.connect(host, httpsPort))
Serial.println("connected to google maps");

if (!client.connect(host, httpsPort)) {
Serial.println("connection failed");
return;
}

String url = "https://maps.googleapis.com/maps/api/directions/json?
origin=22.631123,%2088.378373&destination=Kamarhati&departure_time=now
&&traffic_model=best_guess&key=XXX";
Serial.print("requesting URL: ");
Serial.println(url);

client.print(String("GET ") + url + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n"
);
Serial.println("request sent");

while (client.connected()) {
char c = client.read();
Serial.print(c);
}
Serial.flush();
delay(5000);

String line = client.readStringUntil('}');
/if (line.startsWith("{"geocoded_waypoints":"
[{"geocoder_status":"OK"")) {
Serial.println("esp8266/Arduino CI successfull!");
} else {
Serial.println("esp8266/Arduino CI has failed");
}
Serial.println("reply was:");
Serial.println("==========");/
Serial.println(line);
Serial.println("==========");
Serial.println("closing connection");
}

 void loop() {
}

Debug Messages

Output is Garbage value: ????????????????????????????????????????????????????????????????????????????????

[quarxdmz]

maybe you have set your Serial Baudrate to a different value other than what you have defined "Serial.begin(115200);"

[vshymanskyy]

Could be possibly related to #3002

[itsashishupadhyay]

I think it is because of "https" and esp isn't able to connect as it fails SSL authentication, Try "http://maps.googleapis.com/maps/api/directions/json"

[earlephilhower]

Original author hasn't been seen in over a year. We've moved to BearSSL a long time ago, so closing for now. If the latest 2.5.0 doesn't work, please open a new issue.