RE: NRF51822 data stream to Linux machine

FormerMember — Thu, 16 Jun 2016 08:57:31 GMT

There are several options that could work:

1) If setting a too low connection interval in the peripheral, a connection interval lower than the central accepts, it seems like the central chooses a very long connection interval. What you can try is to increase the preferred connection interval for the peripheral and see when the central choose to use that connection interval. Normally, a central should be able to handle much lower than 100 ms.

You can also try the ble_app_hids_mouse example in the SDK. If the linux machine supports mouse application over BLE, it will need to have connection interval much lower than 100 ms.

2) If you have an extra nRF51-DK/Dongle or nRF52-DK, you can use that kit as the central for you application by using the newly released nRF Connect. nRF Connect is based on S130/S132 v2.0 SoftDevice versions, and S130/S132 v.2.0 supports short connection intervals.

If you want to develop your own central you can for instance use pc-ble-driver-js that can be found on Nordics github repository.

RE: NRF51822 data stream to Linux machine

Wojtek — Wed, 15 Jun 2016 10:56:55 GMT

Just about sampling frequency: They could achieve 200Hz ex. by sending 100packets per sec, each packet containing 2 samples...