As part of my requirement, we need to have paring connection between microcontroller (Cortox M3) and Mobile or Pc. We are using Alpwise stack for our purpose. My problem is with the controller configurations, not with the mobile, because without paring i am able to work with it.
Where should i the API "BLESMP_InitiatePairing" api. Presently i am calling the api inside GAP_callback function, inside BLEGAP_EVENT_CONNECTED.
Is this a correct location to call at this API, because if i call over here, control goes to BLEEVENT_PAIRING_COMPLETE (returning SMERROR_UNKNOWREASON) then it goes into BLEEVENT_PAIRING_REQUEST then once again it goes into
BLEEVENT_PAIRING_COMPLETE (returning SMERROR_UNKNOWREASON). Whereas when i call "BLESMP_InitiatePairing" api, it returns me with success message
(You listed the core-bluetooth tag, so I'm assuming you want to use iOS.)
I don't know the specific stack you are using. However, if you are developing an LE peripheral and want to connect with an iOS device as central, it is sufficient to reply to a read / write request with an InsufficientAuthentication error code. iOS will then initiate pairing from its side.
More details on this process can be found in the Bluetooth Accessory Design Guidelines for Apple Products Section 3.9.
Related
first of all: What i am trying to do is only for private interest.
I'd like to connect a AT-09/HM-10 BLE-Module with Firmware 6.01 to another device which provides also a BLE Module, which it is not based on the CC254X-Chip,
I am able to communicate with this Device using my Laptop with integrated Bluetooth, Linux and the bluepy-helper. I am also able to make a connection using the HM10 through a USB-RS232-Module and "Hterm", but after that quite Stuck in my progress.
By "reverse-engineering" the Android-Application for controlling this particular device i found a set of Commands, stored as Strings in Hex-Format. The Java-Application itself sends out the particular Command combined with a CRC16-Modbus-Value in addition with a Request (whatever it is), to a particular Service and Characteristic UUID.
I also have a Wireshark-Protocol pulled from my Android-Phone while the application was connected to the particular device, but i am unable to find the commands extracted from the .apk in this protocol.
This is where i get stuck. After making a connection and sending out the Command+CRC16-Value i get no response at all, so i am thinking that my intentions are wrong. I am also not quite sure how the HM-10-Firmware handles / maps the Service and Char-UUIDs from the destination device.
Are there probably any special AT-Commands which would fit my need?
I am absolutely not into the technical depths of Bluetooth and its communication layer at all. The only thing i know is that the HM-10 connects to a selected BLE-Device and after that it provides a Serial I/O and data flows between the endpoints.
I have no clue how and if it can handle Data flow to certain Service/Char UUIDs from the destination endpoint, althrough it seems to have built-in the GATT , l2cap-Services and so on. Surely it handles all the neccessary communication by itself, but i don´t know where i get access to the "front-end" at all.
Best regards !
I'm a newbie of BLE programming on android.
In my first apps using BLE on android, I have a big problem.
I got a ScanRecord from Apple Bluetooth Headset using this function.
#Override
public void onScanResult(int callbackType, ScanResult result)
and I got a manufacturer data using Apple corp, ID(0x4C).
after that, I don't know how to decode a manufacturer data.
I want to auxiliary bluetooth headset information such as battery info, direction info etc. but I don't know how to decode the manufacturer data.
I also searched Apple development document(https://developer.apple.com/accessories/Accessory-Design-Guidelines.pdf)
But that guide document didn't help me.
Anyway, anyone who tell me how to resolve this problem?!!?!
Thank you to read my question.
Ok so from your comment it looks like you scanned the device over BLE and want to use one of the services it offers to get information like battery info.
The first thing you will need to do establish a connection to the BLE device.
The scanresult you pasted has a method getDevice you'll need to call
After you get the device you can call its connectGatt method. This will attempt to connect your phone and BLE device.
The connectGatt method from step 2 requires a callback. When the connection is successful or unsuccessful the callback will fire onConnectionStateChanged. If successful it will have the success status. This method will also give you a gatt device we will use in step 4.
If step 3 was successful we can assume your phone is connected. The next thing we want to do is discover services. You do this by using the gatt devices discoverServices method.
When the services are discovered your callback will fire onServicesDiscovered. At this point you can now use services. Depending on the API of the headphones they'll want you to read, or subscribe to a services characteristic and descriptor. Since I don't know the API I can't help you further. But you'll end up needing to use one or more of the following:
setCharacteristicNotification
readCharacteristic
readDescriptor
And the value will return to your callback on. Keep in mind you must wait for the callback for each request before write/reading/subscribing to another characteristic or descriptor.
I have just started using Thingsboard and made some good progress in understanding how some of the basic stuff works ( mainly sending sensor data using mqtt ). But I have come to a complete halt at one point. Here is an explanation of the problem. Thingsboard version is 1.3.1
My setup:
4x RPi (Raspberry Pi) used as gateways to gather data from bluetooth
beacons
A set of bluetooth beacons
Here's what the system is supposed to do:
Send periodic data from the gateways ( RPi ) to inform thingsboard that the gateway is alive
The above part is working fine. I have set up the gateways to connect to thingsboard using access token, and post the data ( both the attributes and telemetry ). For sending attributes I use "v1/devices/me/attributes" and for telemetry data I use "v1/devices/me/telemetry", as mentioned in the documentation.
A typical string from the gateway indicating that it is alive is
{"gwA.macid": "00:00:00:00:00:00", "gwA.timestamp": "2018-02-16T19:20+01:00"}
The above part is working well. This is just for an indication that the gateway is well and able to communicate with the Thingsboard server. All the gateways connect to thingsboard using it's own respective access token and posts the above data.
Now the problem part ( or where I got halted )
The gateways gather the data about the nearby bluetooth beacons and post it too.
The data format in which the gateways posts the beacon data is
{"bcn000001.mac": "00:00:00:00:00:00", "bcn000001.timeepoch": 1518939044}
The gateway ensures that each beacon data will have the correct prefix. For example
{"bcn000001.mac": "50:80:25:AA:BB:CC", "bcn000001.timeepoch": 1518939044}
{"bcn000002.mac": "50:80:25:RR:AA:DD", "bcn000002.timeepoch": 1518939039}
{"bcn000003.mac": "50:80:25:GG:33:EE", "bcn000003.timeepoch": 1518939020}
But the data about the same sensor can also come from another gateway. How do I show it on a single widget irrespective of which gateway the data comes from. If I choose "entity list" then either it does not work, or shows up all the 4 RPi gateways on the widget. This is not what I want. I have attached an image. I am not sure if I am able to explain this well but pls do let me know if there is any other information that I can furnish. I am adding an image to point to some things that I just mentioned. I have even separated the data out by using a prefix ( as mentioned in one of the earlier SO posts ). I have spent close to couple of days on this. This was not supposed to be difficult. At least that's what I thought when I got started.
Note: As I explore, I just learnt (realized) one more thing. I think this part was a little confusing so I thought I should inform others. When one adds a device in Thingsboard, there is an option to specify if the device "Is a Gateway". What it is trying to tell(ask?) is that whether thingsboard gateway service is installed on that device. In my case I made the mistake(?) of thinking that a device that gathers data from sensors and posts it to the server is a gateway device. I guess I'll try to install thingsboard gateway service on the raspberry pi, then see how it goes. I'll post an update once I am done but in the meantime any useful comments or suggestions - please keep em coming.
I have seen others ask very similar question on SO. Something fundamental like this shouldn't be so difficult. No point in have a hundred pages of documentation without a clear explanation of most basic steps towards setting up an IoT backend/dashboard. All I wanted to do is to display the same sensor data ( say Sensor A ) coming from "any one of the devices", to show on the same widget. If I choose single entity, the widget won't update if the data comes from other device. If I choose entity list, and turn on "Resolve as multiple entities", then I end up with the widget showing all the devices
you are using wrong API. The API you are looking for is gateway API which allows to push telemetry and other messages on behalf of other devices. Please use this API https://thingsboard.io/docs/reference/gateway-mqtt-api/ on the Raspberry Pi gateways. You can also use our Gateway project and modify it for your needs.
i am developing game in j2me. In that i have to handle external and internal event.. I studied in some of websites that we can handle the event with the help of hidenotify() and shownotify().
But it dont know where to use these two methods? whether in hidenotify() in pauseApp() and shownotify() in startApp() or somewhere else..
Please anyone give me a clear idea about handling the event in mobile.
In J2ME world, external events resemble the following:
In coming SMS message. This is used trigger application specific action caused by a message sent from a pre-defined and well known sender. This feature is known as "push".
Media card inserted and the application needs to recognize it and act upon it.
If the phone is NFC enabled, launching an application when the phone is taken to a card reader.
When a server is attempting to connect to the phone, launch the application and perform some specific action. This requires that phone is addressable on network; very few of them support it.
Launching the application at a specific time.
I hope you get the idea. Most of the above are achieved by making use Push Registry.
The events that you are talking about are the callbacks to application that AMS (Application Management Software) notifies before the component is being shown and before the component is being hidden.
And pauseApp will be called by AMS when the application is about to be paused; this typically happens when there is an incoming phone call, or the flip is closed (on a flip phone) etc.
Hope it answers your question.
I want to a Java ME application that transfers any SMS received to a PC using bluetooth. The PC can then direct the Java ME application via bluetooth to send a response SMS. Is there library available for this architecture or I have to design it myself?
Is this approach correct or a better one exists? I want to use bluetooth as then I will not have dependency on the cable.
You'll need to create this yourself, however you'll find that you can't do what you want with J2ME.
J2ME can't access any old SMS that the handset receives, only ones sent to a specific port upon which the MIDlet is listening. So to get all the other SMSes, create a bluetooth serial/dial-up connection to your handset in the way I've described in this answer.
Create a PC client which repeatedly issues AT+CGML commands (as described in the AT command set document linked to in the answer above), to see when an SMS has been received. Use AT+CGMR to read and parse the message text. Then use AT+CGMS to sent a response. This can all be done over bluetooth.
It's better to use the serial connection to send a response, because a MIDlet cannot usually be triggered to open based on incoming bluetooth data.
Hope this helps.
You may have already achieved your task, anyway for the reference I think it is much better if you try using Gammu . I'm using it for the same task (Send / receive SMS through PC ) with a simple bat file I have written, works like a charm.
Anyway you don't need any J2me program for this.
Wammu takes care of making the connection to phone and sending AT commands.