TI E2E Community
Low Power RF & Wireless Connectivity
CC3000 Force Re-scan
Is there any way to force a re-scan of the available APs on the CC3000? If I turn off my test AP, the scan results will continue to show the AP for about a minute after it's been turned off. I would like to be able to clear out all previously seen APs and restart the scan manually so I can see the test AP 'disappear' within a couple seconds. It would also be acceptable if the scan rate could be increased so the scan results represent only APs that were seen within the last few seconds, but it's not clear how to do this using the set_scan_params function (if it's even possible).
We are trying to reproduce your scenario and come back with an answer. Are you using a specific sample application?
The wlan_ioctl_get_scan_results() return the populated table inside the CC3000 of the surrounding APs.
The CC3000 populate this table according to generated scan policies.
Few terminologies explanation:
There are 2 different policies:
- Elad Raz
Elad, thanks for the details. So it sounds like it is not possible to force a scan cycle. I am setting all scan params to defaults where all 16 interval array values are 2000.
wlan_ioctl_set_scan_params(1, 20, 30, 2, 0x7FF, -100, 0, 205, intervals);
Miguel, I started with the MSP430 basic wifi application but added some more commands for additional control. The init is the same, but here are my additional commands.
Connect:s = wlan_connect(WLAN_SEC_UNSEC, "PHS-37f", 7, NULL, NULL, 0);
Disconnect:s = wlan_disconnect();
Set scan params:s = wlan_ioctl_set_scan_params(1, 20, 30, 2, 0x7FF, -100, 0, 205, intervals);
Show scan results:s = wlan_ioctl_get_scan_results(0, (unsigned char *)&r);
Delete policy:wlan_ioctl_set_connection_policy(DISABLE, DISABLE, DISABLE);wlan_reboot();
// WLAN On API Implementation
wlan_init( CC3000_UsynchCallback, sendWLFWPatch, sendDriverPatch, sendBootLoaderPatch, ReadWlanInterruptPin, WlanInterruptEnable, WlanInterruptDisable, WriteWlanPin);
// Trigger a WLAN device
// Turn on the LED 5 to indicate that we are active and initiated WLAN successfully
P3OUT |= BIT5;
// Mask out all non-required events from CC3000
P3OUT &= ~BIT5;
P3OUT &= ~BIT7;
While the CC3000 is connected there is no active scan triggred.
It looks like I can sort of force a scan by enabling the 'use profiles' policy and rebooting the module. If there are no stored profiles, the CC3000 appears to start scanning immediately after boot without automatically connecting to an AP. There is still an issue of it not returning all of the visible APs, but at least this looks like a way to force a scan while not being connected to an AP.
All content and materials on this site are provided "as is". TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with regard to these materials, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. TI and its respective suppliers and providers of content make no representations about the suitability of these materials for any purpose and disclaim all warranties and conditions with respect to these materials. No license, either express or implied, by estoppel or otherwise, is granted by TI. Use of the information on this site may require a license from a third party, or a license from TI.
TI is a global semiconductor design and manufacturing company. Innovate with 100,000+ analog ICs andembedded processors, along with software, tools and the industry’s largest sales/support staff.