Shared channel broadcast data lost

[Fan]

Hey I'm developing a sensor network using ANT shared channel. Here are my set up:

1. I'm using a Android tablet as master. The app was modified from aquired channel app from sdk. What I did is

• Modify the ANT config so it is ANT shared channel
• Loop a broadcast from adress 1 - 5 in the Channelhandler when channel event is TX

2. For the sensor I used a nRF51422 system which config to send two broadcast data back to master in every 5s period.

3. the channel freq is 4*5=20hz, I put a delay about 1s after set broadcast on sensor side. And I used a shared slave channel

Here is the problem, I'm experiencing a huge data lost of the broadcast data from master.

Any ideas?

Thanks in advanced for your help!!

[Petter Myhre]

What Android tablet are you using? What app are you using on the tablet? How are you testing this? Do you have any code you could share with us?

[Fan]

Hey, im using a Samsung tablet and use a app I customized from ANT android SDK. The app works perfectly when just use a single channel.

[Fan]

My system works fine with single channel. Now I've swithed to shared channel, When I set a broadcast on nrf system, I delay for 1s so ANT have enough time to send the data(channel is 4Hz). However data lost is about 50%. And if I extend the delay to 4s for example, data lost reduced significantly.

[Petter Myhre]

Have you tested your setup with ANTware as well? I'll try to look into this, but I haven't used to ANT Android SDK too much. Have you tried to contact ANT about this? If not, I recommend you to do that.