Forums - BLE and 802.15.4

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BLE and 802.15.4
shaun.obrien
Join Date: 10 Oct 19
Posts: 3
Posted: Mon, 2020-04-27 07:15
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My company has an application that utilizes BLE to connect to a mobile device and then uses the the QAPI HMI API to access 802.15.4 to communicte between devices. We are using the QCA 4020.  

When commands come in over BLE, they are ultimately forwarded over HMI to other devices on the network.  There are direct commands as well as broadcasts (to address 0xFFFF).

Occasionally we see channel access failures (QAPI_HMI_STATUS_CODE_CHANNEL_ACCESS_FAILURE) in the logs, however after a few retries it seems to recover.  The error seems to be thrown more consistently when the BLE and HMI/802.15.4 connections are active at the same time (mobile device is connected and sending commands to the network).  

Any ideas why the channel access error is being thrown?  

Thanks

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Re: BLE and 802.15.4
c_rpedad
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Join Date: 18 Jun 18
Location: San Jose
Posts: 317
Posted: Tue, 2020-05-12 10:28
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Kindly share us your instruction used with QCLI_demo when QAPI_HMI_STATUS_CODE_CHANNEL_ACCESS_FAILURE error is observed to verify locally.

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Re: BLE and 802.15.4
baraujo821
Join Date: 2 Apr 20
Posts: 2
Posted: Tue, 2020-06-30 04:17
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Quote:
My company has an application that utilizes BLE to connect to a mobile device and then uses the the QAPI HMI API to access 802.15.4 to communicte between devices. We are using the QCA 4020.  

When commands come in over BLE, they are ultimately forwarded over HMI to other devices on the network.  There are direct commands as well as broadcasts (to address 0xFFFF).

Occasionally we see channel access failures (QAPI_HMI_STATUS_CODE_CHANNEL_ACCESS_FAILURE) in the logs, however after a few retries it seems to recover.  The error seems to be thrown more consistently when the BLE and HMI/802.15.4 connections are active at the same time (mobile device is connected and sending commands to the network).  

Any ideas why the channel access error is being thrown?  

It is hard to say without a logs.

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Re: BLE and 802.15.4
mihir.bindu.ext
Join Date: 6 Nov 22
Posts: 1
Posted: Mon, 2022-11-07 02:36
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how to directly access 802.15.4 library to develop our own Application instead of ZigBee or Thread?

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