{"id":1059,"date":"2013-10-03T22:20:55","date_gmt":"2013-10-04T02:20:55","guid":{"rendered":"http:\/\/tim.cexx.org\/?p=1059"},"modified":"2013-10-03T22:20:55","modified_gmt":"2013-10-04T02:20:55","slug":"notes-to-myself-test-a-bluetooth-low-energy-device-on-raspberry-pi-the-quick-way","status":"publish","type":"post","link":"https:\/\/tim.cexx.org\/?p=1059","title":{"rendered":"Notes to myself: Test a Bluetooth Low Energy device on Raspberry Pi, the quick way"},"content":{"rendered":"

Testing if the new nRF8001-based Mosquino BLE shield I built actually works.
\nWith the unmodified library<\/a> and example code, it purports itself to the a Nordic heartrate monitor.<\/p>\n

\"mq-shield-ble\"<\/a><\/center><\/p>\n

Much of the below based on Michael Saunby’s blog post on<\/a> checking out a TI SensorTag.<\/p>\n

Install bluez and hcitool (plus any dependencies). As of today, current version available from a stock raspbian is 4.99-2. NOTE: “gksu synaptic” from the console to get a working graphical package manager, if you’re into that sort of thing. (“Gtk-WARNING **: cannot open display: :0” probably means you used sudo instead of gksu; bad dog.)<\/p>\n

Then…<\/p>\n

$ sudo hcitool hci0 up
\n$ sudo hcitool lescan<\/p>\n

If all goes well, output like:<\/p>\n

LE Scan …
\nDF:32:3A:73:A3:1C Nordic HRM V1.0
\nDF:32:3A:73:A3:1C (unknown)<\/p>\n

If that’s your device, congratulations, it’s working!<\/p>\n

Connecting to it…<\/p>\n

$ gatttool -b DF:32:3A:73:A3:1C –interactive
\n[ ][DF:32:3A:73:A3:1C][LE]> connect
\n[CON][DF:32:3A:73:A3:1C][LE]> char-read-hnd 0x01
\n[CON][DF:32:3A:73:A3:1C][LE]>
\nCharacteristic value\/descriptor: 00 18
\n[CON][DF:32:3A:73:A3:1C][LE]> <\/p>\n

Don’t ask me how to find out the handles your device supports or what the resulting data means; that’s an exploration for another day…<\/p>\n

Bonus trick: make the computer beep everytime it gets an advertising packet:<\/p>\n

$ sudo stdbuf -oL hcitool -i hci0 lescan | while read; do beep -l 20 -f 1000; done<\/p>\n

Good for range testing (I have not tested it).<\/p>\n","protected":false},"excerpt":{"rendered":"

Testing if the new nRF8001-based Mosquino BLE shield I built actually works. With the unmodified library and example code, it purports itself to the a Nordic heartrate monitor. Much of the below based on Michael Saunby’s blog post on checking out a TI SensorTag. Install bluez and hcitool (plus any dependencies). As of today, current […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_FSMCFIC_featured_image_caption":"","_FSMCFIC_featured_image_nocaption":"","_FSMCFIC_featured_image_hide":"","iawp_total_views":0,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1059","post","type-post","status-publish","format-standard","hentry","category-general"],"_links":{"self":[{"href":"https:\/\/tim.cexx.org\/index.php?rest_route=\/wp\/v2\/posts\/1059","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tim.cexx.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tim.cexx.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tim.cexx.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tim.cexx.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1059"}],"version-history":[{"count":3,"href":"https:\/\/tim.cexx.org\/index.php?rest_route=\/wp\/v2\/posts\/1059\/revisions"}],"predecessor-version":[{"id":1063,"href":"https:\/\/tim.cexx.org\/index.php?rest_route=\/wp\/v2\/posts\/1059\/revisions\/1063"}],"wp:attachment":[{"href":"https:\/\/tim.cexx.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1059"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tim.cexx.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1059"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tim.cexx.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1059"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}