ArduinoJson | 📟 JSON library for Arduino and embedded C++ Simple and efficient

I'm having trouble getting the keys (and values) from "prefs" in the following json.

I'm having an issue with the httpsecureclient library for the ESP in the Arduino IDE.

I try to send http requests to a https domain (that doesn't change) and works alot of times just fine.

Like I do some HTTP calls to obtain certain data to let the ESP do it's thing. But when I want to let the ESP post a payload to a server, using the WiFiClientSecure and HTTPClient, it sometimes works without issues, but all of a sudden, it stops working and throws me the well known, nothing saying -1 response code...

The code I ues to send a heartbeat is the following;

How can I make the WifiManager library work on a ESP32 board? I'm using PlatformIO to develop my code.

Here are my imports:

I am trying to authenticate using signIn() method and exact replica of example code from ESP32 Client library (the new version)

• When I run my code I successfully connect to WiFi and also I can successfully CREATE new account from the ESP32 board.
• I need to know if my log in or registration was successful
• In my Firebase authentication signup with email/pass is enabled.

In my serial monitor I can read that the error code is 400 this:

Code that I am using:

I cannot not find a solution for this problem. Everything worked very well when I tried a month ago, but now, when I launch it, it does not work anymore. The problem occurs when I send http.POST(data); request to the given address, but Serial.println(httpResponseCode); returns -11. I've tested my domain URL on Postman and everything worked there. Thank you for any help.

I am working on an Arduino project that will mix cocktails for me. I've decided to save a list of cocktails in a JSON file named cocktails.json, which is saved on an SD card, and upon cocktail selection, I would like the Arduino to find its recipe in the JSON file. A small snippet of the JSON looks like this:

I am getting started with electronics and microcontrollers programming.

I have made a simple circuit where I use DHT22 sensor to measure temperature and humidity. I have also made my own API in Node and Express (MongoDB as a database). It is very simple API, just two endpoints: one for getting. and one for posting data. I ma able to create succesfull requests using Postman (and with the browser).

Just to be clear, I want to send temperature and humidity to my API, and then do some work with this data on Vue website (I think that this is not relevant at all, but again, just to be clear what I am trying to achieve).

Now I will say what I am using:

Windows 10 OS NodeMCU ESP32 microcontroller DHT22 sensor HTTPClient library (I think this one is causing a problem) PlatformIO with Arduino.h header file Everything is ok, but when I try to send data to my database things fail. I am ALWAYS getting following error

[e][wifigeneric.cpp:739] hostbyname(): dns failed

I have tried to make the POST request using both http://localhost:3000/endpoint and http://127.0.0.1/endpoint (that part is really strange, why I am getting DNS error when using IP address without domain name?).

I have already looked up for the solution on the web. I have come across many similar questions on github, but any of them worked for me). Also, none of them were solving error caused by line 739.

Here I will leave my code. Is is simple and short, so I will post all of it. Please, do not blame me for my c++ skills, I am getting better :D

Thank you in advance, have a nice day or evening.

Kind regards, Bartek.

I'm trying to do a GET request to my weather forecast API service with an Arduino nano 33 IoT but I can't parse JSON data because the code output also other information inside the string, is there a way to "clean" the string with only the JSON data? Here's my code

I am trying to run a program using the ArduinoJson library with the VSC extension Code Runner but I cannot compile it.

There are no markup errors or warnings in VSC but when I try to run this snippet: