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By Sagoos
#91597 Hi! I am currently trying to send some values in a JSON body to a database with my ESP 8266.
When I send the body through Postman everything works great. I have tried to follow tutorials online but when I implement my endpoint, api key and body, I get the responsecode "-1".

Board: LOLIN (WEMOS) D1 mini lite

Code: Select all#include <ESP8266HTTPClient.h>
#include <ESP8266WiFi.h>
#include <ArduinoJson.h>
void setup() {
  Serial.begin(115200);                            //Serial connection
  WiFi.begin("ssid", "pass");   //WiFi connection
  while (WiFi.status() != WL_CONNECTED) {  //Wait for the WiFI connection completion
    Serial.println("Waiting for connection");
void loop() {
  if (WiFi.status() == WL_CONNECTED) { //Check WiFi connection status
    StaticJsonBuffer<300> JSONbuffer;   //Declaring static JSON buffer
    JsonObject& JSONencoder = JSONbuffer.createObject();
    JSONencoder["article"] = "3 mm";
    JSONencoder["amount"] = 23;
    char JSONmessageBuffer[300];
    JSONencoder.prettyPrintTo(JSONmessageBuffer, sizeof(JSONmessageBuffer));
    HTTPClient http;    //Declare object of class HTTPClient
    http.begin("URL/endpoint");      //Specify request destination
    http.addHeader("Content-Type", "application/json");  //Specify content-type header
    http.addHeader("auth-key", "Bearer <API key>");  //Specify authorization header
    int httpCode = http.POST(JSONmessageBuffer);   //Send the request
    String payload = http.getString();                                        //Get the response payload
    Serial.println(httpCode);   //Print HTTP return code
    Serial.println(payload);    //Print request response payload
    http.end();  //Close connection
  } else {
    Serial.println("Error in WiFi connection");
  delay(300);  //Send a request every 30 seconds

Code: Select allWaiting for connection
  "article": "3 mm",
  "amount": 23


The body that is printed here is the exact same as the one I'm sending in Postman.
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