docman | Docs generator for Postman REST Client | REST library
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kandi X-RAY | docman Summary
Docs generator for Postman REST Client. Docman parses Postman dump files and outputs documentation as set of Markdown files.
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QUESTION
I need to advertise 2 different sets of data, 31 bytes each. It doesn't look possible when I look at the core specification v4.0.
What I understand when looking a bit further, beacons can be advertised in 3 different channels : 37, 38, 39. LE Set Advertising Parameters Command makes it possible to choose a specific channel as well as all at once.
Is it possible to advertise different data in different channels ?
If it is not possible, the only solution I remain with is changing the advertisement data periodically using LE Set Advertising Data Command.
I would be glad to see a bit insight on performance, stability and power consumption.
...ANSWER
Answered 2020-Jun-14 at 08:23Yes, your device can act as several BLE beacons as long as you periodically change the advertising payload. Your suggestion of using LE Set Advertising Data Command is my recommended approach and you don't need to change the advertising channel for this purpose.
In other words, what you can do on your device is set up a timer, and then as soon as the timer expires, you can switch to a different set of BLE data that is being advertised, which will create the affect of your device acting as multiple beacons.
Please see the following links which may be helpful to your question as well:-
- Can BLE devices act as beacons
- advertise custom service uuid with bluez 5.4x
- Linux BlueZ custom Manufacturing Scan Response Data
- Bluez BLE peripheral advertise custom characteristic with ADV data
I hope this helps.
QUESTION
I have a Bluetooth LE Remote which I would like to pair with my Raspberry Pi Zero.
]
I was able to successfully pair the remote with an Android phone and it then worked like a Keyboard and I was able to type numbers on the keypad into a blank note and even change the volume on the phone.
It seems raspbian does not support HID over Gatt, which means that I need to implement/mimic a minimal HID over GATT behaviour using python. (Please correct me if there is a more straight-forward way to do this.)
RaspbianI can discover the remote in the Linux Terminal using lescan:
ANSWER
Answered 2019-Mar-08 at 09:08I am able to access the bluetooth LE remote now on my Raspberry Pi Zero thanks to @ukBaz who pointed out how to access the HID over GATT (short HoG in Linux:
Pair the remote usingbluetoothctl
This has to happen only once.
First I press and hold 1 and 3 simultaneously to clear any current pairing on the remote. This is specific for my remote model, but it is good to know that resetting a device prior to connecting it might be necessary.
QUESTION
I'm working on a firmware update scheme that requires end-to-end encryption of a firmware image. The target device is a Bluetooth Low Energy chip, with hardware support for the cryptography specified in Blueooth Spec, AES-CCM. We want to leverage this hardware to minimize code size and speed, so we need to encrypt a firmware image in the format for which the hardware is built.
So, I'm trying to use the .NET's AesManaged class such that I can reproduce the data samples given in the Bluetooth Spec (p 1547), but I'm not getting the same outputs. Here's the sample data:
Payload byte length: 08
K: 89678967 89678967 45234523 45234523
Payload counter: 0000bc614e
Zero-length ACL-U Continuation: 0
Direction: 0
Initialization vector: 66778899 aabbccdd
LT_ADDR: 1
Packet Type: 3
LLID: 2
Payload: 68696a6b 6c6d6e6fB0: 494e61bc 0000ddcc bbaa9988 77660008
B1: 00190200 00000000 00000000 00000000
B2: 68696a6b 6c6d6e6f 00000000 00000000Y0: 95ddc3d4 2c9a70f1 61a28ee2 c08271ab
Y1: 418635ff 54615443 8aceca41 fe274779
Y2: 08d78b32 9d78ed33 b285fc42 e178d781T: 08d78b32
CTR0: 014e61bc 0000ddcc bbaa9988 77660000
CTR1: 014e61bc 0000ddcc bbaa9988 77660001S0: b90f2b23 f63717d3 38e0559d 1e7e785e
S1: d8c7e3e1 02050abb 025d0895 17cbe5fbMIC: b1d8a011
Encrypted payload: b0ae898a 6e6864d4
For now, I'd be happy just to get encryption working without authentication. I've noticed that the MIC and Encrypted Payload are T and Payload XOR'd with S0 and S1, respectively, so my goal is simply to generate S0. My understanding is that I should be able to do this by ECB'ing the CTR0 array with the key K:
...ANSWER
Answered 2018-Jan-05 at 19:51Turns out the use of StreamWriter was the problem. Upon removing that and replacing it with csEncrypt.Write(), I got my expected output.
I still don't really understand my fix, so I was about to edit this question, but seeing as the issue probably has nothing to do with cryptography, I think that would be better addressed as a separate question. Alternatively, if someone can explain the fix, I'll change the accepted answer to that.
QUESTION
I want to use the Kronos Workforce Central API to view and edit queries in the Kronos Transaction Assistant.
I can login to Kronos by submitting an XML login request to /wfc/XmlService, but I haven't found any documentation for accessing the Transaction Assistant.
ANSWER
Answered 2018-May-11 at 15:23According to the Workforce Central v6.3 Timekeeping Developer's Guide (login required), you can retrieved failed XML transactions from the Transaction Assistant with .
FailedXMLTransaction TagThe FailedXMLTransaction tag provides information about an XML transaction that has failed an attempt to process an XML request. It is used to retrieve or modify failed XML transaction information.
Note: This tag provides information for the Transaction Assistant.
You can use the Load action to view entries from the Transaction manager.
LoadReturns all failed transactions for the specified SourceName and TransactionType. You must specify at least one of these properties with the Load action; if you do not, an error is returned.
Return Value Type: Zero or more FailedXMLTransaction tags
Optional Properties: SourceName, TransactionType
The XML request below retrieves failed Pay Code Edits that were submitted by the Workforce Integration Manager.
QUESTION
I can't find a proper answer on the Internet.
The Bluetooth Basic Rate / Enhanced Data Rate (BR/EDR) appeared with the 2.0 Bluetooth Core Specification to improve data rate transfers. The Bluetooth Low Energy (BLE) appeared with the 4.0 Bluetooth Core Specification to improve consumption in the IoT field. Yet, to make those two modes work together (BLE & BR/EDR) you had to use a "Smart Ready" module (or dual-mode specific module).
Today, we have the Bluetooth 5. I don't quite understand if, when I browse Bluetooth 5 SoC on the market, the BR/EDR is implemented natively. For the BLE mode, it is. From a general FAQ :
Is the low energy feature of Bluetooth a part of Bluetooth 5.0?
Yes, Bluetooth with low energy functionality, introduced in Bluetooth 4.0, is a feature within Bluetooth Core Specification version 5.0. In fact, the new features and benefits of Bluetooth 5.0 are designed specifically for Bluetooth with low energy functionality.
But for the BR/EDR mode, the Bluetooth 5 Core Specification states (p323, Vol : 2 Core System Package [BR/EDR Controller Volume]) :
Two modulation modes are defined. A mandatory mode, called Basic Rate, uses a shaped [...]. An optional mode, called Enhanced Data Rate, uses PSK modulation [...].
So, from the Core Specification, the EDR mode is optional. Yet, I can't find any SoC or module (BT5 compliant) that has this EDR mode, like it doesn't exist anymore but everyone exhibit high data transfers (more than EDR used to be with previous version).
So, is the EDR implemented natively in BT5 (as the BLE is) even if the Core Specification states it as optional ? Where am I wrong ?
Thanks !
...ANSWER
Answered 2018-Jan-15 at 20:09"Most" things in the Bluetooth Core specification are optional. You can have a BT5-compliant Bluetooth Classic chip that doesn't have any LE functionality and you can have a BT5-compliant BLE chip that doesn't have any Bluetooth classic features.
To check whether a particular Bluetooth chip supports a specific feature, just look it up at https://launchstudio.bluetooth.com/Listings/Search.
QUESTION
I am trying to find a simple repository or website which provides access to the Bluetooth Specification, with previous versions available. I have found this so far:
BT Specification Versions Found (misc. sources)
Is there a single repository for these instead?
...ANSWER
Answered 2017-Apr-15 at 08:34Everything is public on Bluetooth SIG's website:
- Adopted specifications for current in force documents
- Legacy specifications for superseded standards
- Deprecated specifications for older standards that passed the deprecation period
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