How to implement selecting one ANT+ master device pair if multiple master deice exist.

RE: How to implement selecting one ANT+ master device pair if multiple master deice exist.

Petter Myhre — Mon, 31 Oct 2016 11:33:00 GMT

Great! Then I would appreciate if you would accept my answer by clicking the check mark next to it.

RE: How to implement selecting one ANT+ master device pair if multiple master deice exist.

leif — Fri, 28 Oct 2016 08:55:38 GMT

Hi Petter, Thank you for your support. the issue was fixed. The network key cause the issue. Anyway, Thank you very much.

RE: How to implement selecting one ANT+ master device pair if multiple master deice exist.

leif — Thu, 27 Oct 2016 11:39:41 GMT

I am sure that no functions are returning any error. if there is error, We can review printing error info and halt it. if we have more time, we will move the code to the platform with SDK12.1. But now,We want to verify if it is ok for searching device base on SDK11.0.0 S332 ANT_s332_nrf52_0.9.1.alpha.hex. Thanks.

RE: How to implement selecting one ANT+ master device pair if multiple master deice exist.

Petter Myhre — Thu, 27 Oct 2016 11:06:12 GMT

I don't think there should by any difference. You are checking that no functions are returning any errors? Could you check if you see the same behavior with SDK 12.1? It has support for S332 v2.0.0 (and S212 v2.0.0)

RE: How to implement selecting one ANT+ master device pair if multiple master deice exist.

leif — Thu, 27 Oct 2016 10:20:38 GMT

Hi Petter, Thank you for your comment. for item b, i have got it. But We meet a strange phenomenon. base on ant_background_scanning demo code with softdevice S212 ANT_s212_nrf52_0.9.1.alpha.hex. They are ok for searching master device and pair it. But We move the demo code with softdevice S332 ANT_s332_nrf52_0.9.1.alpha.hex They are fail for searching master device. We can't search any master device. the configure parmaeter are the same. is there the different between S212 and S332 for searching master device? Before, base on S332. auto pairing is ok. Our device need to use BLE and ANT+ protocol.So We develop it base on S332.

RE: How to implement selecting one ANT+ master device pair if multiple master deice exist.

Petter Myhre — Thu, 27 Oct 2016 07:59:57 GMT

a) If you don't use the radio for anything else, process the events quickly, and set the search waveform to ANT_WAVEFORM_FAST you should be able to find much more than 8 masters, but I would recommend testing this.

b) Can't you just do it the same way? I would just open a new channel with the Channel ID that identifies the channel. You can use the extended message format to get the device number, device type and transmission type, see Section 7.1.1 in the ANT Message Protocol for more information.

RE: How to implement selecting one ANT+ master device pair if multiple master deice exist.

leif — Thu, 27 Oct 2016 01:35:39 GMT

Thanks you for your information. I is studying the relevant app note and demo code. Now, base on the demo code, We can search multiple master sensor device . So i have some question as below:

a) how many master devices can be found for each channel ? if there is a max limit value? We use tool ANT ware II as master device simulators. it can simulate max 8 master device and slave device can search them all. but if 8 is the max limit value or more than 8 master device?

b)how to pair the selected master device? The demo code is not included it . Before, We configure the channel ID parameter and call lib sd_ant_channel_open to open the channel. They will pair automaticaly.Now, it have openned the channel when searching device. we should call which lib to pair it when selecting the device number of the master device?

RE: How to implement selecting one ANT+ master device pair if multiple master deice exist.

Petter Myhre — Tue, 25 Oct 2016 09:40:30 GMT

I think you can use background scanning for this.

We have an example in the SDK, see this.

Dynastream also have a relevant app note, ANT Channel Search, available here.

RE: How to implement selecting one ANT+ master device pair if multiple master deice exist.

leif — Mon, 24 Oct 2016 09:47:32 GMT

My initial idea is that identifying the master device by channel ID like divice number,device type. for example: case 1 : if the user operate the menu of pairing bike speed and cadence sensor . our device will display all bike speed and cadence sensors within range of our device. case 2 : if the user operate the menu of pairing speed and distance sensor . our device will display all speed and distance sensors within range of our device. case 3 : if the user operate the menu of pairing Heart rate monitor sensor . our device will display all Heart rate monitor sensors within range of our device. of course, I want receiving data from master device when scaning stage.

RE: How to implement selecting one ANT+ master device pair if multiple master deice exist.

Petter Myhre — Mon, 24 Oct 2016 09:23:59 GMT

How would you identify the master device you want receive data from?