####### (Bunget, read 'ge' as in George)
- Linux
- sudo apt-get install uuid-dev
- sudo apt-get install cmake
- sudo apt-get install build-essential
- sudo apt-get install libcrypto++-dev
BUNGET is a C++ library for Linux which help to write GAP/GATT servers (Bluetooth 4.0). It provides abstract classes and methods to create GATT services, characteristics (READ/WRITE/NOTIFICATIONS). The library does not require the Bluez, but it requires some bluetooth utilities. The library was written from scratch. The idea of writing 'yet another BTLE implemetation' came after I spend days and days trying Bluez and Bleno. I could not get Blues working programatically and easy. Bleno is terible slow and tremendous resource eater, also brings entire java enciclopedia along with. So: here is a simple C++ library which uses just a HCI socket and GAP/GATT protocol helping to write GATT services.
- Server only: GATT services characteristics, descriptors or beacons.
- Characteristics: R W I N + Descriptors.
- Requires: hciconfig tool from blues package in /usr/bin
- (iii). Bunget lib will stop the bluetooth service.
- (iiii) Read all documents.
- Latest version is at: https://github.com/zirexix
- Disable / uninstall bluetooth service.
- Disable kill any bt managers if you have a desktop environment.
- check if there are any processes keeping BT up. (ps ax | grep blu )
- Kill them all. Make sure they not restart.
- Turn device running Linux system in to a GATT server.
- Soon all specific dev platforms for embedded custom chips will be replaced by Linux, pretty soon...
- Debug HCI clients
Demo video. If the image does not work use this link: http://209.177.145.195/share/bunget.mov
Bluez, Bleno, StCube/BlueNrg, Bluetooth 4.0 Specs.
##License: Free, for non commercial products, otherwise you need a written personalised license from the Author.
- See libbunget.h in the source tree
- See main.cpp in the source tree
- For services use 16 bit UUID's. Maximum 8 servics / 8 characteristics.
- Do not mix UUIDS of 16 bytes with UUIDS of 128 bytes on the same running unit.
- The GATT (services/charact./descr.) was tested only with 16 byte UUIDS.
- Beacon advertising, needs 128 bit UUID's only.
- ArduUiPush;No screens scanned and loaded for advertised name.
Check also: ArduUiPush demo: https://www.youtube.com/watch?v=Fw4yCe2ejNw
- On different BTLE dongles the timing between receiving HCI event and sending back data disrupts the functionality.
- Build with DEBUG enabled. If after connection the progress stops around this TRACE:
HCI: ACL_START
-->[16]0240200B0007000400100100FFFF0028
GATT DATA:ATT_OP_READ_BY_GROUP_REQ
my_proc event: onServicesDiscovered
* Tweak the receive<delay>send value at main line 127. .
* My Broadcom dongle works with >16 ms delay on R-PI and with >2 ms on 4 quad HP Intel PC.
```javascript
IServer* BS = ctx->new_server(&procedure, dev, "advname", 0/* tweak delay*/);
- Descriptors for data type not suppotred yet. Use GATT registerred UUIDS or know your type on both ends.
#include <fstream>
#include <iostream>
#include <unistd.h>
#include <stdio.h>
#include <time.h>
#include <assert.h>
#include <uuid.h>
#include <libbunget.h>
using namespace std;
using namespace bunget;
#define UID_GPIO 0x3400
#define UID_TIME 0x3401
#define UID_TEMP 0x3403
bool __alive = true;
class my_proc : public ISrvProc
{
public:
my_proc();
void onServicesDiscovered(std::vector<IHandler*>& els); // called when remote discover services
void onReadRequest(IHandler* pc); // called when remote reads pc's value charact.
int evSubscribesNotify(IHandler* pc, bool b); // called when remote writes notification descriptor !=0
void onIndicate(IHandler* pc); // called when remote wants pc's indicator value
void onWriteRequest(IHandler* pc); // called when remote writes pc charateristic
void onWriteDescriptor(IHandler* pc, IHandler* pd); // called when remote writes pc's charact descriptor pd
void evAdvertise(bool onoff); // called when advertising turns on/off
void evDeviceState(bool onoff); //called when device dongle is plugged / unplugged (buggy still)
void evClientState(bool connected); // called when a client connects / disconnetcs
bool evLoop(IServer* ps); //called when the hci-socket idles. Be short!.
// return false to break the run() blocking call.
private:
void _prepare_gpio17(); // RPI specific, to control LEDS for the purpose of the demo
const char* _get_time(); // reads local time, and returns a string
float _get_temp(); // reads temp, on RPI.
const char* _get_temp_s(); // same as above but returns a string
uint8_t _get_gpio(); // reads GPIO status on RPI
void _send_value(IHandler* pc); // sends a value to GATT
public:
char _some[20];
bool _subscribed;
IHandler* LedChr; // RW
IHandler* TimeChr; // NIR
IHandler* Temp1Chr; // NIR
};
int main(int n, char* v[])
{
BtCtx* ctx = BtCtx::instance(); // get singleton Bunget instance
my_proc procedure; // callback instance of above class
IServer* BS = ctx->new_server(&procedure, 0, "rpi-bunget", 0); // one GATT server per hci device
IService* ps = BS->add_service(0x123F,"demo"); // add a service to the GATT server
//
// add some characterisitcs
//
procedure.LedChr = ps->add_charact(UID_GPIO,PROPERTY_WRITE|PROPERTY_INDICATE|PROPERTY_NOTIFY,
0,
FORMAT_RAW, 1); // 1 / 0 // many per service
procedure.TimeChr = ps->add_charact(UID_TIME, PROPERTY_READ|PROPERTY_NOTIFY,
0,
FORMAT_RAW, 20); // we send it as string
procedure.Temp1Chr = ps->add_charact(UID_TEMP, PROPERTY_NOTIFY|PROPERTY_INDICATE,
0,
FORMAT_RAW, 20); // we send it as string
try{
BS->advertise(true);
BS->run();
}
catch(hexecption& ex)
{
TRACE(ex.report());
}
return 0;
}
my_proc::my_proc()
{
_subscribed=false;
_prepare_gpio17();
}
bool my_proc::evLoop(IServer* ps)
{
static int inawhile=0;
// notification
if(_subscribed && inawhile++%600==0)
{
_send_value(TimeChr);
_send_value(Temp1Chr);
}
return true;
}
// ... see main.cpp for the rest of the callback implenentation####################################################################### #######################################################################
H O W TO B U I L D
#######################################################################
cmake .
make
cd bin
sudo ./bunget 0 (hci device number)#########################################################################
- The C compiler identification is GNU 4.9.2
- Board: RPI-2
- Fresh distribution: Linux minibian 4.1.18-v7+ #846 SMP Thu Feb 25 14:22:53 GMT 2016 armv7l GNU/Linux
- Login as root/raspberry
#
# Prerequisites. Also required for new system
#
apt-get update
apt-get install bluez # (needed for hciconfig utility for now)
apt-get install cmake
apt-get install g++
apt-get install rfkill
apt-get install libcrypto++-dev
service bluetooth stop # not mandatory
update-rc.d -f bluetooth remove # not mandatory
git clone https://github.com/comarius/bunget
cd bunget
cmake .
make
cd bin
#
# check if the device is detected
#
root@minibian:~/bunget/src/bin# hciconfig
hci0: Type: BR/EDR Bus: USB
BD Address: 5C:F3:70:76:B2:B2 ACL MTU: 1021:8 SCO MTU: 64:1
DOWN
RX bytes:616 acl:0 sco:0 events:34 errors:0
TX bytes:380 acl:0 sco:0 commands:34 errors:0
# argument for hci0 is 0, for hci1 is 1 and so on
# therefore we run our GATT server as
./bunget 0
root@minibian:~/bunget/src/bin# ./bunget 0
sh: echo: I/O error
Failed to stop bluetoothd.service: Unit bluetoothd.service not loaded.
my_proc event: onAdvertized:0
my_proc event: onDeviceStatus:1
my_proc event: onAdvertized:1
#
# here I connected the BTLE scanner phone and read all the characteristics
#
accepted: 5F:C9:32:F3:5D:F6,*
my_proc event: onServicesDiscovered
my_proc event: onWriteDescriptor:1
my_proc event: onSubscribesNotify:3400=1
my_proc event: onWriteDescriptor:1
my_proc event: onSubscribesNotify:3401=1
my_proc event: onWriteDescriptor:1
my_proc event: onSubscribesNotify:3403=1
- stop bunget
- disable bluetooth service
- stop bluetooth service
- kill any process which uses bluetooth (scripts, desktop daemons, etc.)
- restart on the mobile the bluetooth service (off 5 seconds, then on / reboot recomanded on some chipsets)
- Tweak the timout [0-64] in main ctx->new_server(&procedure, dev, hostname, );
- Make sure any processes that uses BT is killed, otherwise the LE disconects, or fails to grab services.
- On board BT4 and default installed system. See the C H I P readme page.
- Linux minibian 4.4.17-v7+ #901 SMP Fri Aug 12 17:57:27 BST 2016 armv7l GNU/Linux
- gcc (Raspbian 4.9.2-10) 4.9.2
- g++ (Raspbian 4.9.2-10) 4.9.2
- Linux X540LA (ACER) 4.4.0-47-generic #68-Ubuntu SMP Wed Oct 26 19:39:52 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
- gcc (Ubuntu 4.8.5-4ubuntu2) 4.8.5
- g++ (Ubuntu 4.8.5-4ubuntu2) 4.8.5
- Linux hp 3.19.0-32-generic #37~14.04.1-Ubuntu SMP Thu Oct 22 09:41:40 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
- g++ (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4
- gcc (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4
[33544.074470] usb 4-1.2: new full-speed USB device number 5 using ehci-pci
[33544.171100] usb 4-1.2: New USB device found, idVendor=0a5c, idProduct=21e8
[33544.171108] usb 4-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[33544.171114] usb 4-1.2: Product: BCM20702A0
[33544.171118] usb 4-1.2: Manufacturer: Broadcom Corp
[33544.171123] usb 4-1.2: SerialNumber: 5CF3706B72D6
[33544.172183] bluetooth hci1: Direct firmware load for brcm/BCM20702A0-0a5c-21e8.hcd failed with error -2
[33544.172193] Bluetooth: hci1: BCM: patch brcm/BCM20702A0-0a5c-21e8.hcd not found
- Nexux Tablet Android 6.0,
- ACER T06, Android 6.0, using following apps
- BLE Scanner
- ArduiuiPush
- Failed with ACER AI - 830
- Failed with Android 4.4.2
#######################################################################
Questions, Bugs, Commercial usage: Contact by eMail for any questions: marrius9876@ g m a i l . c o m