12 lead ecg system using nRF52832 - huge data loss when phone shake.

[Abhinav Cardea]

Dear experts.. we are trying to build a 12 lead ecg system which sends real time data to mobile phone for plotting using nRF52832. While most of the time it works ok, when we vigorously shake the phone, a huge data loss can be observed. the phone used here is Samsung with BLE 4.2.  I was wondering if that is a normal phenomenon? our sampling rate is 500 samples per second and roughly we are sending 11k byte per  sec.

[awneil]

Abhinav Cardea said:

we vigorously shake the phone

Who is "we" ?

In particular, is it the person who has the ECG attached?

It is a fundamental difficulty with ECGs to keep the electrodes in good skin contact while the subject is moving!

Have you tried with a wired comms link to see if the problem is actually in the comms, or elsewhere ?

Or have you tried just sending some known-good test data to see if it is actually the comms link that's the problem?