Need help with implementating s110 and s120 pair of devices

RE: Need help with implementating s110 and s120 pair of devices

Chaiwat Sungkhobol — Tue, 28 Apr 2015 19:13:52 GMT

Thank you that is what I needed. I guess for the last question it would be sending out notification when a change occurs to all the connected device.

RE: Need help with implementating s110 and s120 pair of devices

Chaiwat Sungkhobol — Tue, 28 Apr 2015 18:08:17 GMT

For example to send out the battery level to the S110 so that if the battery is low on the s120 the s110 would alert the user.

RE: Need help with implementating s110 and s120 pair of devices

Petter Myhre — Tue, 28 Apr 2015 13:23:28 GMT

We have some examples implementing GATT client in the S110, but we don't have any examples implementing GATT server in the S120. However, the S120 supports a full GATT server for 8 concurrent ATT server sessions. So it should be just to use the GATT server API in the same way it is used in the S110 examples.

The S110 GATT client examples are:

ble_app_alert_notification
ble_app_cts_c (uses Database Discovery module)
ble_app_proximity
experimental_ble_app_ancs

I would use one of the two first as a starting point.

Would s110 be able to do discovery of service on the s120?

Yes

Would I have to make another service for the s110 to advertise to have the s120 look for since it is not actually advertising the battery service.

You don't have to, but as you say the S120 needs something to look for. This doesn't need to be a service, it could be a device name, or a code or something in the manufacturer specific data.

I need the battery from the s120 to be able to be sent to multiple s110 also would this implementation work?

Sent is very unspecific, but multiple clients should be able to read the characteristic value, or multiple clients should be able to be notified or indicated with a characteristic. I haven't tested this myself, but I will try do it soon. Please let me know how it goes.

Edit 29.04.2015: I just did a quick test. I added the the battery service to ble_app_hrs_c (GAP central and GATT server), and with ble_app_cts_c (GAP peripheral and GATT client) as a starting point I was able to discover and read the battery level.

RE: Need help with implementating s110 and s120 pair of devices

Petter Myhre — Tue, 28 Apr 2015 10:16:53 GMT

Can I ask why you need the GATT server to be on the S120?

RE: Need help with implementating s110 and s120 pair of devices

Chaiwat Sungkhobol — Sat, 25 Apr 2015 20:29:06 GMT

It would seem that s110 can not do discover db.