Background Scanning Channel

Question

I would like to use Channel 0 of the S310 Stack V1.0.0 on the nRF51422 to do a background scan of ANT devices. 
 I am testing against ANTWARE II v4.1 with the ANT+ usb dongle. I opened two channels of the same frequency, but at different period. I also enabled Extended messaging on both of them with different Device Number. 
 I tried turning on the Background Search mode, however, I was only able to catch one of the channel despite both of them are broadcasting at the same time. 
 Is there a mode that I can use to scan for all ANT devices in a given RF frequency? 
 Thank you, 
 Jackson

Petter Myhre · Accepted Answer

Sorry for the delayed answer. 
 ANT has an application note on "Background Scanning Channel". 
 I just tested what you describe, and it works as expected. I'm able to receive messages from both master channels. 
 I use the ANT+ USB dongle to send two different messages on two master channels, 
 I used S210 and modified ant_broadcast/broadcast_rx from our SDK. I also did a quick test with S310. 
 I added a few defines, and modified 
 ant_channel_rx_broadcast_setup(void) and channel_event_handle(uint8_t * p_event_message_buffer) . 
 If you go into debug mode and put a breakpoint at count = 0 you should be able to see that the messages array contain both 0x01 and 0x02. 
 I have attached my project, please use it as a proof of concept. [Updated] 
 ANT+ USB dongle setup: 
 Channel0

Master (Transmit)
Tx Only
Device Number: 1
Device Type: 1
Trans. Type: 1
Channel Period: 8 Hz
Radio Freq: 2466MHz
Send Using Extended Messaging (works with or without)
Broadcast: 0x02 0x02 0x02 0x02 0x02 0x02 0x02 0x02 0x02
 
 
 Channel1

Master (Transmit)
Tx Only
Device Number: 2
Device Type: 1
Trans. Type: 1
Channel Period: 4 Hz
Radio Freq: 2466MHz
Send Using Extended Messaging (works with or without)
Broadcast: 0x01 0x01 0x01 0x01 0x01 0x01 0x01 0x01

Background Scanning Channel

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