Questions tagged [arduinojson]

46 questions
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Json parsing not working with JsonObject using ArduinoJson library

I am using the following code to store Config.json file to ESP32 flash memory using SPIFFS #include #include #include bool loadConfig() { File configFile = SPIFFS.open("/Config.json", "r"); if (!configFile)…
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Json serializing in C++ (ESP32)

I'm writing some script for ESP32 and struggling to serialize a json. Used libraries are HTTPClient and ArduinoJson. String payload = http.getString(); Serial.println(payload); deserializeJson(result, payload); const char* usuario =…
alosbh
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Deserialize String into StaticJsonDocument

I'm using ArduinoJson, HTTPClient Libraries for my HTTP related communications in ESP8266. I have used a POST method API which returns me a String (but it's a json). void configure() { String jsonBody; const String dataFetchUrl =…
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Setting variables from json into a struct have weird results

I have something in my code output I don't understand. My guess is the issue is due to [me of course] ... the usage of both "struct"+"arduinoJson" to store configuration values. I have made this simple code that only connect to Wifi; either using…
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How to setup proper POST body using arduino json

I'm trying my hands on arduino. Doing a POST request with some data to a server. But i'm not able to do a proper formatting of that data. I'm using arduinojson for it but i'm not sure whether i'm doing it correctly or not. #include…
Ahmad hamza
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How to read json file from ESP8266's SPIFFS with ArduinoJSON 6?

I am currently working on a project with ESP8266 (ESP-12E) and I need to store information in a json file (more convenient to access via the web interface and easier to manage than EEPROM for me). My problem is the following: I'm using the latest…
Vincent
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ArduinoJSON serialization returns an empty string when serializing to char*

I made a function that serializes settings and returns a char* containing serialized data. First i'm packing all the values into a StaticJsonDocument, then determining size of the output string using measureJson, then allocating space for the output…
EntityinArray
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ESP8266 cannot publishing longer data over mqtt topic

I am using esp8266 and Arduino IDE for programming.when I am trying to publish JSON data over MQTT topic from esp8266 over a wifi network, it is working for the below code. void reportToServer(){ String payload =…
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Can't get data from Googlesheet using esp32 and Arduinojson

I'm new to esp32 and now I'm trying to Get data using ArduinoJson, In my googlesheet "A1" have a number and I want to let esp32 to get it, I send my googlesheet to internet and use the…
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ArduinoHttpClient will not post json

For a school projecht we want to read data from the data pins and send them to a php aplication. We get the data and can make a json string from it, but when we try to send the data (multidimensional) the $_POST var is empty of the php script (it…
user3142817
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How to Create Nested Json Using ArduinoJson on ESP8266

I want this Output Json From Esp8266 I am trying with another json lib https://github.com/arduino-libraries/Arduino_JSON this is lightweight library than arduinojson.org { "ID": "0785E7", "DEVICE": "SINGLE_RELAY", "Public_Name": "Demo…
Mukesh mishra
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Make ArduinoJSON Array globally available

I am wrapping my head around this problem quite a long time now. I am opening a websocket Connection from my ESP32 to my NodeJS Backend. When receiving a message, the content gets parsed with ArduinoJSON. I store the parsed content in global…
Cornelius
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Arduino POST request using JSON

I am trying to get my Arduino (with an Ethernet shield) to send a POST request with a JSON body to my locally hosted server. I am using the ArduinoJson (version 6) and Ethernet libraries. I am attempting to send a POST request to a local endpoint…
Wendell
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NodeMCU JSON POST data issue

I am using the below code for sending POST json requests. I am receiving the request, but the body parameter is coming as null. ("body": null) // Example of the different modes of the X.509 validation options // in the WiFiClientBearSSL object // //…
Biranchi
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How can I Send data directly over to MongoDB without any intermediary?

I wanted to update/push data directly over to the MongoDB using an ESP8266 Wi-Fi module in Arduino. I have seen some solutions referring to use MQTT / their own Node-Red Server to connect with MongoDB and then send connect the data. But I want to do…