AtomS3, UIFlow2 and BLE
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Next steps!
I know that several independent methods have been developed by various people over the past few years to add the ability to stream generic data over the BLE/GATT connection (which wasnt designed for it, really)
Is there an existing implementation/library around that can be used with the BLE devices like the CoreS3? I know it wont be in UIFLOW2 for the foreseeable future, but is there a library out there to handle serial data over BLE/GATT (I think using notifications to send small packets)
Ive found old posts discussing ideas:
https://stackoverflow.com/questions/37151579/schemes-for-streaming-data-with-ble-gatt-characteristics -
@felmue you can give me the steps to scan and connect nearby devices via bluetooth with core S3 please
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Hello and sorry for the delay as been busy with other functions. I will start picking away at UIFlows2x’s BT UART this week and hopefully get the documents up by Sunday.
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@ajb2k3 Alas, its not looking good, UIFlow was update to Alpha21 but on any device other than the CoreS3 I get a reset when trying to use BLE functions.
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@ajb2k3 you arrived to implement ble functions on core S3 ?
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@syrinebh Not sure they work and no computer or phone seas a BT devices and cant get an ATOM S3 devices to run the code without resetting.
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I was able to get the S3 devices to advertise as a BLE server, and write some values out via GATT transactions, and then scan/detect/connect/read those values from a BLE scanner app on my phone - just to prove that it worked.
Its BLE (bluetooth low energy) , not standard bluetooth BR/EDR.
I only determined how to send short (under 20 bytes) GATT messages. I dont think there is a layer to "stream" data using BLE in UIFlOW, just to setup as a BLE server, advertise, and do GATT transactions. BLE is really only meant for a low duty cycle (very short messages occasionally, not a constant connection and streaming data) but even so, that should be okay for sensors and short data packets.
You can read about GATT and BLE here https://learn.adafruit.com/introduction-to-bluetooth-low-energy/gatt
There are more mature arduino libraries for using BLE on ESP32 (ArduinoBLE@1.2.0 for example) if you want to go that route but I think UIFLOW2 is currently limited to the barest of implementations. But it seems to be slowly but surely filling out with more things added each week, and I think it is going to be awesome when it is more complete.
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@mtylerjr is it possible to scan devices with Core S3 ?
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@syrinebh I really dont know. I got it working only responding to scan requests. I had problems trying to get it to work in the other direction, doing the scanning.
Sorry not much help.
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@mtylerjr you mean that you were able to scan S3 devices with your phone and in the other direction (scanning devices with s3 devices) you were not able to find a solution ?
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@syrinebh Yes. But I only spent maybe 2 hours total, experimenting, and that was with UIFlow2 version alpha 17 (maybe?)
Havent tried with the latest (alpha 21?)
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@mtylerjr I'm already working with alpha 21
