how to make HTTPS request in esp8266? - rest

Question

I once wanted to get THERMOCOUPLE DATA and by making HTTP request I put it on API
it worked flawlessly , here is the code for esp32:
// this example is public domain. enjoy! https://learn.adafruit.com/thermocouple/
#include "max6675.h"
#include <ArduinoJson.h>
#include <HTTPClient.h>
#include <WiFiMulti.h>
int thermoDO = 19;
int thermoCS = 23;
int thermoCLK = 5;
MAX6675 thermocouple(thermoCLK, thermoCS, thermoDO);
const char *AP_SSID = "ssid";
const char *AP_PWD = "pass";
WiFiMulti wifiMulti;
void setup() {
Serial.begin(9600);
delay(4000);
wifiMulti.addAP(AP_SSID, AP_PWD);
Serial.println("MAX6675 test");
// wait for MAX chip to stabilize
delay(500);
}
void loop() {
// basic readout test, just print the current temp
Serial.print("C = ");
Serial.println(thermocouple.readCelsius());
Serial.print("F = ");
Serial.println(thermocouple.readFahrenheit());
// For the MAX6675 to update, you must delay AT LEAST 250ms between reads!
delay(1000);
postDataToServer();
}
void postDataToServer() {
Serial.println("Posting JSON data to server...");
// Block until we are able to connect to the WiFi access point
if (wifiMulti.run() == WL_CONNECTED) {
HTTPClient http;
http.begin("https://retoolapi.dev/fyXalF/data/1");
http.addHeader("Content-Type", "application/json");
StaticJsonDocument<200> doc;
// Add values in the document
//
doc["temp1"] = thermocouple.readCelsius();
doc["temp2"] = thermocouple.readFahrenheit();
String requestBody;
serializeJson(doc, requestBody);
int httpResponseCode = http.PUT(requestBody);
if(httpResponseCode>0){
String response = http.getString();
Serial.println(httpResponseCode);
Serial.println(response);
}
else {
Serial.printf("Error occurred while sending HTTP POST");
}
}
}
now I'm trying to do it by esp8266.
so the code is basically the same , you have to put "ESP8266" before library names and for making http.begin() you have to pass a WiFiClient beside API address :
// this example is public domain. enjoy! https://learn.adafruit.com/thermocouple/
#include "max6675.h"
#include <ArduinoJson.h>
#include <ESP8266HTTPClient.h>
#include <ESP8266WiFiMulti.h>
#include <WiFiClientSecure.h>
int thermoDO = 19;
int thermoCS = 23;
int thermoCLK = 5;
MAX6675 thermocouple(thermoCLK, thermoCS, thermoDO);
const char *AP_SSID = "ssid";
const char *AP_PWD = "pass";
ESP8266WiFiMulti wifiMulti;
void setup() {
Serial.begin(9600);
delay(4000);
wifiMulti.addAP(AP_SSID, AP_PWD);
Serial.println("MAX6675 test");
// wait for MAX chip to stabilize
delay(500);
}
void loop() {
// basic readout test, just print the current temp
Serial.print("C = ");
Serial.println(thermocouple.readCelsius());
Serial.print("F = ");
Serial.println(thermocouple.readFahrenheit());
// For the MAX6675 to update, you must delay AT LEAST 250ms between reads!
delay(1000);
postDataToServer();
}
void postDataToServer() {
Serial.println("Posting JSON data to server...");
// Block until we are able to connect to the WiFi access point
if (wifiMulti.run() == WL_CONNECTED) {
WiFiClient client;
HTTPClient http;
http.begin(client,"https://retoolapi.dev/fyXalF/data/1");
http.addHeader("Content-Type", "application/json");
StaticJsonDocument<200> doc;
// Add values in the document
//
doc["temp1"] = thermocouple.readCelsius();
doc["temp2"] = thermocouple.readFahrenheit();
String requestBody;
serializeJson(doc, requestBody);
int httpResponseCode = http.PUT(requestBody);
if(httpResponseCode>0){
String response = http.getString();
Serial.println(httpResponseCode);
Serial.println(response);
}
else {
Serial.printf("Error occurred while sending HTTP POST");
}
}
}
it compiled but I got "bad request-400" and "The plain HTTP request was sent to HTTPS port" as a response .
I think the esp8266 library cant send https requests ...
any ideas how to solve this ?
PS : I also use #include <WiFiClientSecure.h>
WiFiClientSecure client;
HTTPClient http;
http.begin(client,"https://retoolapi.dev/0tvafA/data/1");
it's not working either : Error occurred while sending HTTP POSTC = 0.00
:(