Puck to Android connection

[espruino-discuss]

Posted at 2017-03-01 by user73560

Hi Guys,

I would like to connect from Puck to Android using "NRF.connect("Bluetooth Mac address")"
What is required on Android, start GATT server ?

Thank you.

[gfwilliams]

Posted at 2017-03-01 by @gfwilliams

That's right, yes. I believe you may be able to experiment using the nRF connect app to create a server.

[espruino-discuss]

Posted at 2017-03-02 by user73560

Hi Gordon,

I configured a sample GATT server using nRF connect app. I have following issues:

• NRF.setScan executed on Puck does not return any results.
• NRF.connect("Bluetooth Mac address") executed on Puck cannot connect and fails with "Unhandled promise rejection: Connection timeout."

Thank you.

[gfwilliams]

Posted at 2017-03-02 by @gfwilliams

I guess you just typed NRF.setScan()? You need to add a handler to make it work.

Try NRF.findDevices(print) for something a bit easier.

There are different types of address too - see what findDevices returns - you may have to put random after the Mac address to make it work (if the address is classified as not being universally unique).

[espruino-discuss]

Posted at 2017-03-02 by user73560

Hi Gordon,

Neither

packets=10;
NRF.setScan(function(d) {
  packets--;
  console.log(d); // print packet info
  if (packets<=0)
    NRF.setScan(); // stop scanning
});

nor

NRF.findDevices(function(devices) {
  console.log(devices);
}, 1000);

return any results.

I guess configuring GATT server with the sample configuration does not start the server itself.

Another approach could be implementing a GATT server on Android.

[gfwilliams]

Posted at 2017-03-02 by @gfwilliams

Ahh, that all looks fine. Sometimes it can depend on your phone - as far as I know not all Android phones support Central mode.

If you had a second Android phone then you could at least test :)