Some reminder notes for myself for playing around with Bluetooth adaptors.<\/p>\n
Note that bluetooth seems to be incredibly flaky – at least from my tests.
\nI would often get timeouts and failures. Results will depend on the radio environment around you…
\nPlus apparently the bluetooth adaptors I have all have the same mac address, so thats also an issue if you encounter the same and have > 1 plugged into various computers… Oh well, at least they were cheap!<\/p>\n
Did some post mortem testing with a T series Thinkpad, seemed better, but still not 100% – I guess thats why people just don’t use it.<\/p>\n
Install bluetooth – <\/p>\n
plug in a usb bluetooth adaptor This will install some useful bluetooth tools. Hopefully at this point your device is recognized – <\/p>\n This should return the mac address of the bluetooth adaptor:<\/p>\n If the address is 00:00:00:00:00:00, then its not setup, check dmesg and see what kind of device you have.<\/p>\n Heres mine – <\/p>\n And a grep of ooth (as could be BlueTooth or Bluetooth or bluetooth…) from dmesg<\/p>\n If you don’t get a valid mac address, reboot, as that seemed to work for me. You can try loading those with modprobe You can also use hciconfig to list the name of the device (this is what you’ll see listed in another device if you enable discovery…)<\/p>\n Assuming the above is working, hcitool dev gives you a mac address, then hcitool scan should give a list of nearby bluetooth devices. As you can see I have a device close by Ping it<\/p>\n Ping: 00:1E:52:EC:A5:50 from 00:1F:81:00:08:30 (data size 44) ... Lets try to connect to it<\/p>\n – For auth to work, you’ll need to setup a pincode file in \/var\/lib\/bluetooth\/[mac address of the bluetooth adaptor inside your computer]\/pincodes #mac address of device connecting to, pin to use when connecting If you want to be able to see your computer from another device, make it visible – We can also setup a serial connection to our bluetooth device we want to connect to Assuming you’ve connected to the device, and setup an rfcomm serial connection, you can use gnokii to query the device. (in gnokii – get the phone details) > --identify<\/p>\n #(in gnokii - get the first sms in the phone) Some reminder notes for myself for playing around with Bluetooth adaptors. Note that bluetooth seems to be incredibly flaky – at least from my tests. I would often get timeouts and failures. Results will depend on the radio environment around you… Plus apparently the bluetooth adaptors I have all have the same mac address, so […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[25,4],"tags":[386,387,389,388],"class_list":["post-825","post","type-post","status-publish","format-standard","hentry","category-technical-mumbo-jumbo","category-useful-info","tag-bluetooth","tag-gnokii","tag-hci","tag-sms"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.computersolutions.cn\/blog\/wp-json\/wp\/v2\/posts\/825","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.computersolutions.cn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.computersolutions.cn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.computersolutions.cn\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.computersolutions.cn\/blog\/wp-json\/wp\/v2\/comments?post=825"}],"version-history":[{"count":1,"href":"https:\/\/www.computersolutions.cn\/blog\/wp-json\/wp\/v2\/posts\/825\/revisions"}],"predecessor-version":[{"id":826,"href":"https:\/\/www.computersolutions.cn\/blog\/wp-json\/wp\/v2\/posts\/825\/revisions\/826"}],"wp:attachment":[{"href":"https:\/\/www.computersolutions.cn\/blog\/wp-json\/wp\/v2\/media?parent=825"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.computersolutions.cn\/blog\/wp-json\/wp\/v2\/categories?post=825"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.computersolutions.cn\/blog\/wp-json\/wp\/v2\/tags?post=825"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}apt-get install bluez-utils bluetooth<\/code><\/p>\n
\nreboot <\/p>\n
\nhcitool, hciconfig, rfcomm are the basic command line bluetooth tools we’ll be using.<\/p>\nhcitool dev<\/code><\/p>\n# hcitool dev
\nDevices:
\n\thci0\t00:1F:81:00:08:30<\/code><\/p>\nlsusb
\nBus 001 Device 003: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
\n<\/code><\/p>\n
\ndmesg | grep ooth
\n[ 4.845001] Bluetooth: Core ver 2.15
\n[ 4.845130] Bluetooth: HCI device and connection manager initialized
\n[ 4.845132] Bluetooth: HCI socket layer initialized
\n[ 4.891477] Bluetooth: Generic Bluetooth USB driver ver 0.6
\n[ 8.940263] Bluetooth: L2CAP ver 2.14
\n[ 8.940264] Bluetooth: L2CAP socket layer initialized
\n[ 8.943819] Bluetooth: RFCOMM TTY layer initialized
\n[ 8.943822] Bluetooth: RFCOMM socket layer initialized
\n[ 8.943823] Bluetooth: RFCOMM ver 1.11
\n[ 8.990134] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
\n[ 8.990135] Bluetooth: BNEP filters: protocol multicast
\n[ 9.298370] Bluetooth: SCO (Voice Link) ver 0.6
\n[ 9.298372] Bluetooth: SCO socket layer initialized
\n<\/code><\/p>\n
\nYes, its a hassle, but I didn’t delve too deeply into what modules needed to load.
\nIf you don’t want to reboot I’ve modprobed for bluetooth and have the modules below post boot<\/p>\n lsmod | grep bluetooth
\nbluetooth 41827 9 sco,bnep,rfcomm,l2cap,btusb
\nrfkill 13044 2 bluetooth
\n<\/code><\/p>\nhciconfig -a name
\nhci0:\tType: BR\/EDR Bus: USB
\n\tBD Address: 00:1F:81:00:08:30 ACL MTU: 1021:4 SCO MTU: 180:1
\n\tUP RUNNING PSCAN ISCAN
\n\tRX bytes:3551 acl:52 sco:0 events:140 errors:0
\n\tTX bytes:1243 acl:50 sco:0 commands:53 errors:7
\n\tFeatures: 0xff 0x3e 0x09 0x76 0x80 0x01 0x00 0x80
\n\tPacket type: DM1 DM3 DM5 DH1 DH3 DH5 HV1 HV2 HV3
\n\tLink policy: RSWITCH HOLD SNIFF PARK
\n\tLink mode: SLAVE ACCEPT
\n\tName: 'Accel-OB2'
\n\tClass: 0x000000
\n\tService Classes: Unspecified
\n\tDevice Class: Miscellaneous,
\n\tHCI Version: 2.0 (0x3) Revision: 0x44
\n\tLMP Version: 2.0 (0x3) Subversion: 0x3
\n\tManufacturer: Cambridge Silicon Radio (10)
\n<\/code><\/p>\n
\nSuggest make something discoverable – eg a closeby desktop with bluetooth for testing.<\/p>\nhcitool scan
\nScanning ...
\n\t00:1E:52:EC:A5:50\tapple\u2019s iMac
\n<\/code>\t<\/p>\n
\nLets get some info about it<\/p>\n# hcitool info 00:1E:52:EC:A5:50
\nRequesting information ...
\n\tBD Address: 00:1E:52:EC:A5:50
\n\tDevice Name: apple\u2019s iMac
\n\tLMP Version: 2.0 (0x3) LMP Subversion: 0x7ad
\n\tManufacturer: Cambridge Silicon Radio (10)
\n\tFeatures: 0xff 0xff 0x8f 0xfe 0x9b 0xf9 0x00 0x80
\n\t\t<3-slot packets> <5-slot packets>
\n\t\t
\n\t\t
\n\t\t
\n\t\t
\n\t\t
\n\t\t
\n\t\t
\n\t\t
\n<\/code><\/p>\nl2ping 00:1E:52:EC:A5:50<\/p>\n
\n44 bytes from 00:1E:52:EC:A5:50 id 0 time 17.76ms
\n44 bytes from 00:1E:52:EC:A5:50 id 1 time 31.87ms
\n44 bytes from 00:1E:52:EC:A5:50 id 2 time 23.92ms
\n<\/code><\/p>\n
\nhcitool cc 00:1E:52:EC:A5:50
\nhcitool auth 00:1E:52:EC:A5:50
\n<\/code><\/p>\n
\nAdd the mac address of the device you want to connect to, and the pincode e.g.<\/p>\ncat \/var\/lib\/bluetooth\/00:1F:81:00:08:30\/pincodes<\/p>\n
\n00:1E:52:EC:A5:50 0000<\/code><\/p>\n
\nMake our computer visible to a bluetooth scan
\nhciconfig hci0 piscan<\/code><\/p>\n
\nrfcomm sets up a virtual serial port connection on the hci port specified. Then you can access the device via a serial connection – eg for gnokii or similar.<\/p>\nrfcomm connect 0 00:1E:52:EC:A5:50<\/code><\/p>\n
\nGnokii is mostly for Nokia phones, but you can use AT commands to connect to other devices, such as iPhones etc.
\nFor my test purposes, I needed to assist with integrating SMS to PHP, so was looking at setting up a bluetooth connection to a phone, then querying that for sms’s every 30 seconds or so, then passing that to a db or php script. Gnokii was the second part of that equation, as it can do some of that without too much headache.<\/p>\n
\n gnokii --shell 2> \/dev\/null<\/p>\n
\n > --getsms IN 1
\n<\/code><\/p>\n","protected":false},"excerpt":{"rendered":"