May 2013 - Bluetooth-dev - lists.apple.com

Re: data transmission rate...to slow...
by Matthew Chung 13 May '13

13 May '13

Frederic, there is only one packet of up to ~20 bytes transmitted every two connection events if you use reliable data transfer. If you want to increase that to ~ four packets every connection event, you have to use unreliable data transfer (WriteWithoutResponse / Notification) and have to add reliability in your app layer. Note that WiFi interferes with BLE, disabling it should net you a small boost in throughput. These are the throughputs I could achieve with iPhone as central and dedicated peripheral: http://www.scriptreactor.com/conn_interval-throughput.pdf Etan _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Re: data transmission rate...to slow...
by William Henderson 13 May '13

13 May '13

Frederic, there is only one packet of up to ~20 bytes transmitted every two connection events if you use reliable data transfer. If you want to increase that to ~ four packets every connection event, you have to use unreliable data transfer (WriteWithoutResponse / Notification) and have to add reliability in your app layer. Note that WiFi interferes with BLE, disabling it should net you a small boost in throughput. These are the throughputs I could achieve with iPhone as central and dedicated peripheral: http://www.scriptreactor.com/conn_interval-throughput.pdf Etan _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Re: data transmission rate...to slow...
by William Henderson 13 May '13

13 May '13

Frederic, there is only one packet of up to ~20 bytes transmitted every two connection events if you use reliable data transfer. If you want to increase that to ~ four packets every connection event, you have to use unreliable data transfer (WriteWithoutResponse / Notification) and have to add reliability in your app layer. Note that WiFi interferes with BLE, disabling it should net you a small boost in throughput. These are the throughputs I could achieve with iPhone as central and dedicated peripheral: http://www.scriptreactor.com/conn_interval-throughput.pdf Etan _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Broadcom BCM20732 and iOS CoreBluetooth encryption issue
by Michael Nannini 13 May '13

13 May '13

Has anyone else had issues using encrypted characteristics with Broadcom BCM20732? If the peripheral hasn't yet been paired with the iOS device, the encrypted writes work fine once the pairing alert has been confirmed, but on subsequent connections the encrypted writes don't work. I found that adding a delay of several seconds after the connection fixes it on an iPad 3, but it won't work at all on iPod Touch 5. -Mike _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Re: A2DP with AAC codec: non-existent document reference in the "Bluetooth Accessory Design Guidelines for Apple Products"
by Aarti Kumar 13 May '13

13 May '13

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Re: data transmission rate...to slow...
by Etan Kissling 12 May '13

12 May '13

Frederic, there is only one packet of up to ~20 bytes transmitted every two connection events if you use reliable data transfer. If you want to increase that to ~ four packets every connection event, you have to use unreliable data transfer (WriteWithoutResponse / Notification) and have to add reliability in your app layer. Note that WiFi interferes with BLE, disabling it should net you a small boost in throughput. These are the throughputs I could achieve with iPhone as central and dedicated peripheral: http://www.scriptreactor.com/conn_interval-throughput.pdf Etan _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Re: data transmission rate...to slow...
by William Henderson 12 May '13

12 May '13

Frederic, there is only one packet of up to ~20 bytes transmitted every two connection events if you use reliable data transfer. If you want to increase that to ~ four packets every connection event, you have to use unreliable data transfer (WriteWithoutResponse / Notification) and have to add reliability in your app layer. Note that WiFi interferes with BLE, disabling it should net you a small boost in throughput. These are the throughputs I could achieve with iPhone as central and dedicated peripheral: http://www.scriptreactor.com/conn_interval-throughput.pdf Etan _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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data transmission rate...to slow...
by William Henderson 12 May '13

12 May '13

Frederic, there is only one packet of up to ~20 bytes transmitted every two connection events if you use reliable data transfer. If you want to increase that to ~ four packets every connection event, you have to use unreliable data transfer (WriteWithoutResponse / Notification) and have to add reliability in your app layer. Note that WiFi interferes with BLE, disabling it should net you a small boost in throughput. These are the throughputs I could achieve with iPhone as central and dedicated peripheral: http://www.scriptreactor.com/conn_interval-throughput.pdf Etan _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Re: Pairing with an iOS peripheral?
by Scott Perry 08 May '13

08 May '13

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Re: Pairing with an iOS peripheral?
by William Henderson 08 May '13

08 May '13

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