How can design channel map that can coexistence with WiFi to avoid the interference

RE: How can design channel map that can coexistence with WiFi to avoid the interference

Ryan Huang — Fri, 20 May 2016 08:05:19 GMT

Hi David, Thanks for your reply!

RE: How can design channel map that can coexistence with WiFi to avoid the interference

David Edwin — Fri, 20 May 2016 07:32:36 GMT

Yes, it will hop through the WiFi channels, however if you do not compensate for the WiFi your performance will suffer. The map bit setting is as per the specification reference, bad = 0, unknown = 1

RE: How can design channel map that can coexistence with WiFi to avoid the interference

Ryan Huang — Fri, 20 May 2016 01:50:02 GMT

Hi David, Thanks for your reply!

Does the "gap_opt.ch_map.ch_map" set "1" or "0" If this channel is bad that I don't used?
Could you please tell me why we need to set the BLE channel map? Frequency hopping is built into the bluetooth protocol, so the bluetooth connection will adapt to congested channels due to WiFi. This should be handled automatically by the softdevice. Is Right?

RE: How can design channel map that can coexistence with WiFi to avoid the interference

David Edwin — Thu, 19 May 2016 15:18:55 GMT

You can use the sd_ble_opt_set function of the S130/S132 to set the channel map so that the WiFi is avoided. The opt_id you would use is the BLE_GAP_OPT_CH_MAP .

The channels used by WiFi should be set as a "bad" channel, get the WiFi channels in use from your WiFi interface.