iOS writing without response. about adafruit_bluefruitle_firmware HOT 13 CLOSED

Hi @cyrusbowman,

We just update the beta firmware (also 0.7.0 with build date "Mar 25 2016") to enable support for wirte_without_response and write with reponse. Can you test to see if that work for you ?

If possible please let me know how you to test there, so that we can also do it here.

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@hathach Sorry just saw this. Downloaded and tested. Works great. I am able to get ~668 bytes/sec without data loss. Thats sending 20 bytes at an interval of 0.030 sec on iOS. You can probably get it going a little faster with a smaller interval but that suits my needs! Thanks!

@DadoKomar with swift you do blePeripheral.writeValue(DATA, forCharacteristic: CHARACTERISTIC, type: CBCharacteristicWriteType.WithoutResponse)

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The UART service doesn't support write WithoutResponse. Using write WithResponse the correct way. I think this is by design. The hardware could support both but doesn't.

Note that the older Bluefruit nRF8001 is the opposite, you must use write WithoutResponse.

I support both by checking the characteristic's properties before writing. For most cases this doesn't effect the app since CoreBluetooth is transparently handing the write response.

if ((characteristic.properties & CBCharacteristicPropertyWrite) == CBCharacteristicPropertyWrite) {
    [p writeValue:data forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse];
}
else if ((characteristic.properties & CBCharacteristicPropertyWriteWithoutResponse) == CBCharacteristicPropertyWriteWithoutResponse) {
    [p writeValue:data forCharacteristic:characteristic type:CBCharacteristicWriteWithoutResponse];
}

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Thanks for the comment Don!

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Thanks @don. I was wanting to write WithoutResponse because the TX rates aren't high enough for my application. I need ~500 bytes/sec. I like this module but I am not able to get as fast as write rates as the two others I am using. The others have similar speeds as this one when writing WithResponse (~330 bytes/sec). But when writing WithoutResponse on the other two modules I am able to get speeds up to 1130 bytes/sec without any data loss, I was hoping this module would support it.

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Have you tried with the 0.7.0 BETA firmware? It's still a work in progress, but we've been making some meaningful effort to improve speed for the upcoming release. The UART service is able to hit ~1KB/s, for example, though it of course depends on what's on the other end, and we actually need to push some updates out to the Bluefruit LE Connect apps now since they aren't keeping up with the latest firmware throughput. You can enable optional BETA firmware updates in both the iOS and Android apps in the respective app config screens.

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@microbuilder yes I am on 0.7.0 beta. I wrote an app to check the speed. I haven't tried on Android (because I need iOS support) but you'd probably be able to get the 1KB/s you suggest. With iOS's longer connection interval it'd be hard and maybe not even possible to get 500 bytes/sec when you are writing acknowledged packets (ie. WithResponse). But with unacknowledged packets you can send much faster, you just aren't guaranteed delivery. That is what I was hoping to do with this module. There's a TinySine and Serialio module that can do it. I like this module better than those two but until it can send unacknowledged packets I'll have to go with the others.

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Hello @hathach

I have enabled beta versions for your BLE software under iOS, but can not see any beta update in App Store.
When will be 0.7.0 out?

Thanks for help.

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Hello @cyrusbowman

How to send in data mode without response. I did 660 chars/s with old 070 beta firmware. Just the application on iOS started to fall a lot.

Thnaks

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@DadoKomar please try to follow the FAQs here https://learn.adafruit.com/introducing-adafruit-ble-bluetooth-low-energy-friend/faq#faq-10

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There will be an update for the iOS application shortly ... it does currently have problems with really high speed transfers on 0.7.0. The Android app should be OK if you have access to an Android phone while we finish up the next version of the iOS app, though. Sorry for the delay.

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@DadoKomar This is really a support issue not a feature request or bug report ... can you please post support related questions in the Adafruit support forum? The support staff generally doesn't monitor the github issues here.

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Ah, sorry, of course firmware, thought we talking about app. Testing new beta. And I see under nRF UART it is dividing message into 2 to 6 BT packets. (30 chars message now, sending once per sec). I think it behaves like this because of data mode. Now it has nice dalay in sending message. Looks that this BT has a bright future. ;)))

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