http post

[espruino-discuss]

Posted at 2017-06-22 by user78438

I am trying execute a post request from the device, but the device always returns a 'no connection' error when trying to POST.

To troubleshoot I have ran a GET request to the same URL, and the request was successful, this means that internet is working on the device and communication with the intended server is possible.

I then moved on to see if there were errors in my HTTP POST code, I ran the same code in a node.js app and it successfully posted to the server.

Here is the code below, I removed the exact address of my server and my wifi/pass info. I feel as though something is still wrong with the request code.

var http = require("http");
var wifi = require("Wifi");

var sdata = {
 deviceID: 'esp-12',
};

var options = {
  hostname: 'immense-XXXXXX-XXXXX.herokuapp.com',
  method: 'POST',
  path:'/MXXXXXX',
  headers: {
    'Content-Type': 'application/json'
  }
};

var req = http.request(options, function(res) {
  console.log('Status: ' + res.statusCode);
  console.log('Headers: ' + JSON.stringify(res.headers));
  res.setEncoding('utf8');
  res.on('data', function(body) {
    console.log('Body: ' + body);
  });
});
req.on('error', function(e) {
  console.log('problem with request: ' + e.message);
});
payload = JSON.stringify(sdata);
req.write(payload);
req.end();

terminal response from device after execution

problem with request: no connection

I know my ESPRUINO device can connect to the wifi because a) I am programming over TCP/IP and the GET requests to the server are successful.

Here is the documentation for Espruino.js HTTP module. https://www.espruino.com/Reference#http

Can any of the JS gurus see an issue with the request?

Sidenote: I have already configured my wifi with wifi.connect(); and wifi.save();

[espruino-discuss]

Posted at 2017-06-23 by @gfwilliams

All I can think is you need a Content-Length header? It's worth checking out https://www.espruino.com/IoT+Services for some HTTP post examples.

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Posted at 2017-07-13 by user78438

That Fixed it!

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Posted at 2018-01-27 by user85675

How you fix this? I have the same problem with you

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Posted at 2018-03-14 by user87799

Hi there! I'm trying to get an example on how to make a post to io.adafruit.com from espruino with a NodeMCU and I couldn't find any example. Is there a way to pass the authentication headers?

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Posted at 2018-03-14 by Ollie

@user87799 headers won't be a problem, I don't think, but ESP8266 on the NodeMCU is not capable of HTTPS communication via Espruino, so unless Adafruit offer the http:// schema on their API you'll need use a Pico or Espruino Wifi (or maybe ESP32 - I'm not too familiar).