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ok, there are 3 line of code in MQTT.js that cause this.

line 234

this.client.write(fromCharCode(TYPE.PING­RESP << 4) + "\x00");
// change to 
this.client.write(fromCharCode(TYPE.PING­RESP << 4,0));

line 320

this.client.write(fromCharCode(TYPE.DISC­ONNECT << 4) + "\x00");
// change to
this.client.write(fromCharCode(TYPE.DISC­ONNECT << 4, 0));

line 386

this.client.write(fromCharCode(TYPE.PING­REQ << 4) + "\x00");
// change to 
this.client.write(fromCharCode(TYPE.PING­REQ << 4,0));

Just created a pr for this and added a screenshot using it as MQTTX-S without errors.

Hmm, ist does not work with MQTT.min.js

>mqtt = require("MQTT-S")
Uncaught SyntaxError: Got EOF expected '}'
 at line 1 col 3902
....write(f(e.DISCONNECT<<4)+"")}catch(a­){return this._scktClo...
                              ^
>

use curl -O https://www.espruino.com/modules/MQTT.mi­n.jsto download that module and use this code to upload to storage.

s = require("Storage");

module=`
<content of file MQTT.min.js>
`;

s.write("MQTT-S",module.replace(/[\n\r]/­g, ''));

Now you can use it like this:

s = require("Storage");
mqtt = require("MQTT-S");

As this does not happen to often, I am fine with those manual steps ;-)

Many thanks for your quick response. Yes the WebIDE will always reload the module. Small modules I manually store and add S to the stored name like in this case it will be MQTT-S. Missed that feature of the WebIDE to upload modules to strorage, will definitl give it a try.

Copy paste from browser to the WebIDE does not look nice.

Sometimes uploading is taking too long because you use larges modules like MQTT. Is there an easy way to save the loaded module to storage. So next time you uses mqtt = require("MQTTS").

s = require('Storage');
mqtt = require("MQTT");
print(Modules.getCached())
/* output
[ 
  "MQTT", 
  "Storage"
 ]
*/

// save cached module 
s.write("MQTTS", /* howto ?*/);
 

Wow, many thanks!

Thanks, so will dig here Non-Volatile Storage for a solution.

// esp32/build/app/partitions_espruino.csv
....
nvs,data,nvs,0x9000,12K
....

Found this tool named Espressif-NVS-Analyzer to decode the nvs data.

Hi, there is that espouse.py on GitHub that can read the efuse data.

// disable BT
ESP32.enableBLE(false);
//this can onyl be reverted by another call with true as argument

now reading the efuse section

espefuse.py summary --format json --port $COMPORT | grep _BT -A6
    "DISABLE_BT": {
        "bit_len": 1,
        "block": 0,
        "category": "config",
        "description": "Disables Bluetooth",
        "efuse_type": "bool",
        "name": "DISABLE_BT",
        "pos": 1,
        "readable": true,
        "value": false,
        "word": 3,
        "writeable": true
    },

"value" : false does not match the expected result ....

Any hints?

check this page for idf-release-and-soc-compatibility and this one for -C3 details

That would be great!

Many thanks fanoush, very interesting feature!

I missed the espruino command line tool that can upload files to storage via myfile.js containing a save to storage command with the wanted content. So all fine.

Why not open a pre order posibily in your shop? I would buy three even if I have to wait 6 month ;-)

https://github.com/rgomezwap/EspruinoS3

I guess this could be used as a starting point for a build environment for the ESP32-Cx.

Thanks for sharing, will definitly give it a try.

so it's mainly a matter of getting it built with Espressif's newer SDKs I think.

Yes 3.3.6 ist not supporting this type, ESP-IDF 5.x would work.

Did someone tried to build Espruino with help of Platformio, or is this impossible?

Is this mainly for ESP32 usage?

YES, other devices do not have the posibility of flash segmentation. Only ESPs have extra flash areas.

but I wonder whether this would be any more useful than if it were just configured for and baked into the firmware?

Yes, that is the other option we have ;-)

Is there already the possibility to do secure mqtt connection? Have a Pico with a wiz module for Ethernet on my desk and would like to use mqtt secure with providing CA as pem like possible as command like this:

mosquitto_sub -h  host -p 8883 -t topic --cafile /path/to/a/file

Any hints or howto?

Would it be possible to extend the storage module to

• userequire("storage", options) to use storage for external flash storage or specific flash area?

• prep storage content offline like possible for spiff?

• upload offline content to a specific flash are?

Any further ideas how storage could be extended?

Hi, nice tiny ESP32 board. There is no build for board other than the ESP32 Series. There is only very little support by the community. You are wellcome to support. Check to open issues for ESP32 on github and let us know if and how you like to support.

Using module hmac256 to create JSON Web Token. A PR is wating for verification and comments.

const HMAC = require('hmac2256');
HmacSHA256 = function(token, secret) {
      var hmac = HMAC.SHA256(E.toArrayBuffer(secret));
     return btoa(String.fromCharCode.apply(null,  hmac.digest(E.toArrayBuffer(token)))).re­place(/=+$/, ''); 
};

var header = { "alg": "HS256", "typ": "JWT"};
var data = { "id": 1337,"username": "john.doe"};
var secret = "My very confidential secret!";
var encodedHeader = btoa(JSON.stringify(header));
var encodedData = btoa(JSON.stringify(data));
var token = encodedHeader + "." + encodedData;
var signature = HmacSHA256(token, secret);
var jwt = (token+'.'+signature);

got it

signature = HmacSHA256(token, secret);
print(btoa(String.fromCharCode.apply(nul­l, signature)));

Missing a last piece, how to encode the Uint8Array([...]).bufferto a base64. The method toString only allow option 2 and 16, base64 is not implemented, any hint?

There should be a new module named hmac2, because not all boards include SHA256.

Yes, definitely - on my way but struggling a fresh LINUX build and a working connecting via tcp.

sha-256 64 32