# BLE Scanning - Blocking Operation
**URL:** https://community.particle.io/t/ble-scanning-blocking-operation/63201
**Category:** Firmware
**Created:** [September 20, 2022, 6:08pm UTC](https://community.particle.io/t/ble-scanning-blocking-operation/63201 "2022-09-20T18:08:04Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@superpanda](https://community.particle.io/u/superpanda)
#### Post date: [September 20, 2022, 6:08pm UTC](https://community.particle.io/t/ble-scanning-blocking-operation/63201/1 "2022-09-20T18:08:04Z")
Ages ago I wrote an app for an Argon (or may have been a Redbear DUO) that scanned BLE devices and logged them. The scan with callback was non-blocking / asynchronous. It now appears the calls to scan are synchronous. Is there any way to implement a background scanner with the current OS?
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### Author:  [@rickkas7](https://community.particle.io/u/rickkas7)
#### Post date: [September 20, 2022, 7:22pm UTC](https://community.particle.io/t/ble-scanning-blocking-operation/63201/2 "2022-09-20T19:22:15Z")
BLE.scan is always blocking, but you should be able to run it from a worker thread.
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### Author:  [@superpanda](https://community.particle.io/u/superpanda)
#### Post date: [September 20, 2022, 10:16pm UTC](https://community.particle.io/t/ble-scanning-blocking-operation/63201/3 "2022-09-20T22:16:25Z")
That works, thanks. -AP
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### Author:  [@system](https://community.particle.io/u/system)
#### Post date: [March 22, 2023, 10:17am UTC](https://community.particle.io/t/ble-scanning-blocking-operation/63201/4 "2023-03-22T10:17:17Z")
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