ANT Forum

I am developing an Android app over ant+ protocol, which expected to read from up to 24 heart rate sensors synchronously, at least 1 sample/second from each sensor.

If I understood it correctly, only 8 channels available with single usb stick. So I'm wondering, if it is possible to extend channels by plug in second/third usb ant+ stick? Or is there other way to connect to so many sensors?

Any information would be greatly appreciated.      

If the device supports USB Host, you could use multiple ANT USB sticks to add more channels to the device, although you'll likely also need a powered USB Hub as most Android devices are not designed to carry much power over the port.

Another alternative is to use either Continuous Scan Mode or Background Scanning to pick up all messages from multiple devices. CSM is available on all ANT USB sticks, and Background Scanning is only able to pick up every message if the device also supports high duty search (such as the USB-m). This would involve not using the ANT+ API/Plugins but instead use the ANT API to parse the raw messages yourself. If you would prefer to go down this path, please contact support @ thisisant.com for a solution.      

thanks for reply.

In actually, I've made it by using background scanning with Ant SDK.

Thanks again.      

Hello! I have the same problem. How did you solve it?