Adding recognized services to Espruino Hub - config.json

[espruino-discuss2]

Posted at 2021-10-01 by HeneryH_(Henery_Hawk)

I had much of this working a while back but am starting a new project from scratch.

To start back at step 0, I am just trying to advertise a couple of puck metrics and pick them up in Node-Red.

Here is the puck code...

var presses = 0;
clearWatch();
clearTimeout();
clearInterval();

setWatch(function() {
  presses++;
  console.log("Pressed");
  NRF.setAdvertising({
    manufacturer: 0x0590, 
    0x1811 : [presses],
    0x180F : [E.getBattery()],
    0x1809 : [Math.round(E.getTemperature())]
  });
}, BTN, { edge:"rising", repeat:true, debounce:25 });


// Interval to update advertising values
setInterval(function() {
  NRF.setAdvertising({
    manufacturer: 0x0590, 
    0x1811 : [presses],
    0x180F : [E.getBattery()-1],
    0x1809 : [Math.round(E.getTemperature())]
  });
}, 30000);    // 30 sec

On the pi node-red flow I have very simple mqtt receivers and debug statements.

The battery and temp are coming through just fine but I cannot get the presses 0x1811 to work.

At first I subscribed to /ble/advertise/e9:1d:0b:37:51:d3/1811 which was not working.

Then I read more closely in the instructions which said

/ble/advertise/DEVICE/SERVICE - Raw service data (as a JSON Array of
bytes) (if mqtt_advertise_service_data=true in config.json)

So maybe my config.json had that turned off, which it did. I also saw in the config the ability to name services so I tried to put a name to 0x1811 but might be doing that wrong.

I set these two changes from the default config.json.

.
.
  "// We can add our own custom advertising UUIDs here with names to help decode them":0,
  "advertised_services" : {
    "1811" : {
      "presses" : "level"
    }
  },
.
.
  "// Send /ble/advertise/ad:dr:es:ss/uuid raw service data":0,
  "mqtt_advertise_service_data": true,

I know I am doing something stupid wrong and I used to have this all working fine.

Can anyone spot my error?

Thanks

[gfwilliams]

Posted at 2021-10-01 by @gfwilliams

Hi, One thing I do notice is:

  NRF.setAdvertising({
    manufacturer: 0x0590,  //<=============================
    0x1811 : [presses],
    0x180F : [E.getBattery()-1],
    0x1809 : [Math.round(E.getTemperature())]
  });

The manufacturer mine is for manufacturerData and if used should be in the second argument. I'd just remove it as it could be causing issues.

Also, I think you changed the wrong thing on advertised_services... The default example is:

  "advertised_services" : {
    "ffff" : {
      "name" : "level"
    }
  },

and I think you wanted to do:

  "advertised_services" : {
    "1811" : {
      "name" : "presses"
    }
  },

Looks like you changed name to presses rather than level :)

[espruino-discuss2]

Posted at 2021-10-01 by HeneryH_(Henery_Hawk)

Awesome, that worked. Both fixes.

I can't tell you how much I appreciate this help.

I think I did the appropriate amount of trying/learning/failing on my own but started running out of things to try.