esp32-javascript | Provides JS | Interpreter library

by marcelkottmann C Version: Current License: MIT

X-Ray Key Features Code Snippets Community Discussions(1)Vulnerabilities Install Support

kandi X-RAY | esp32-javascript Summary

esp32-javascript is a C library typically used in Utilities, Interpreter applications. esp32-javascript has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

"Lightweight" JS interpreter for ESP32. Provides JS-based eventloop implementation and native asynchronous network and timer functions.

Support

Quality

Security

License

Reuse

Support

esp32-javascript has a low active ecosystem.

It has 52 star(s) with 4 fork(s). There are 6 watchers for this library.

It had no major release in the last 6 months.

There are 0 open issues and 4 have been closed. On average issues are closed in 101 days. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of esp32-javascript is current.

Quality

esp32-javascript has 0 bugs and 0 code smells.

Security

esp32-javascript has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

esp32-javascript code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

esp32-javascript is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

esp32-javascript releases are not available. You will need to build from source code and install.

Installation instructions, examples and code snippets are available.

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esp32-javascript Key Features

No Key Features are available at this moment for esp32-javascript.

esp32-javascript Examples and Code Snippets

No Code Snippets are available at this moment for esp32-javascript.

Community Discussions

Trending Discussions on esp32-javascript

Arduino JSON package - formatting sensor value

QUESTION

Arduino JSON package - formatting sensor value

Asked 2019-Mar-22 at 20:09

#include 
#include 

String input = "{\"temperature\":\"26\"};
SimpleDHT11 dht11;
byte temperature = 0;
int err = SimpleDHTErrSuccess;

void loop {

   StaticJsonBuffer<512> dataBuffer;

   if (err = dht11.read(2, &temperature, NULL)) == simpleDHTErrSuccess) {
       Serial.print((int) temperature);
       JsonObject& dataRoot = dataBuffer.parseObject(input);

       *long Temperature = dataRoot[String("temperature")];
       *Temperature = (long)temperature;
       *dataRoot[String("temperature")] = Temperature;

       String output;
       dataRoot.printTo(output);
}

...

ANSWER

Answered 2019-Mar-22 at 20:09

The method parseObject() allocates and populate a JsonObject (that you can work with) from a JSON string.

The "JsonObject" in your code example is named dataRoot and is defined with

JsonObject& dataRoot = dataBuffer.parseObject(input);

where dataBuffer comes from StaticJsonBuffer<512> dataBuffer; which is the entry point for using the ArduinoJson library, and

where input has the value of the JSON string "{\"temperature\":\"26\"}" which follows the standard JSON attribute-value pair format (you need a JSON string to work with and then send it to the client side).

After JsonObject& dataRoot = dataBuffer.parseObject(input); is executed, you get dataRoot as an object with a property named temperature and you can access this property with dataRoot[String("temperature")]

So the three lines:

Source https://stackoverflow.com/questions/55299956

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install esp32-javascript

Clone esp32-javascript inside your esp directory (normally ~/esp):. Maybe you want to change the BOARD_VARIANT in the ./CMakeLists.txt file for the integrated arduino-esp32 bindings. First build the project with. Connect your ESP32 Dev Board via USB and run. Use the keyboard shortcut AltGr + ] to leave serial monitor. Now you have installed the pre-configured boot script. If this is your first install, your onboard LED should blink now. Blinking signals that your board has started a soft ap with the ssid "esp32". With your mobile or desktop connect to the WLAN SSID "esp32" and open http://192.168.4.1/setup (if you have not changed the default credentials your username / password is esp32 / esp32 ). You can change the default password in firmware-config.ts by changing the value of key password. On the Setup page you can configure your WLAN settings and an URL to download your JS main script from.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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