Is there anything better than this wonky and unreliable hack for capturing keypresses from a handsfree kit?
sudo hciconfig hci0 down sudo hciconfig hci0 up sudo hcidump -l 1 | grep ACL
As the kit connects, I see in syslog
Sep 27 21:17:10 gvoice bluetoothd: Unable to get connect data for Hands-Free Voice gateway: getpeername: Transport endpoint is not connected (107) Sep 27 21:17:10 gvoice bluetoothd: Unable to get connect data for Headset Voice gateway: getpeername: Transport endpoint is not connected (107)
I can see it appearing as
Sep 27 21:14:29 gvoice kernel: [ 827.342038] input: B8:D5:0B:4C:CF:59 as /devices/virtual/input/input6
sudo evtest No device specified, trying to scan all of /dev/input/event* Available devices: /dev/input/event0: B8:D5:0B:4C:CF:59 Select the device event number [0-0]: 0 [...] Event code 402 (KEY_CHANNELUP) Event code 403 (KEY_CHANNELDOWN) Event code 405 (KEY_LAST) Event type 2 (EV_REL) Key repeat handling: Repeat type 20 (EV_REP) Repeat code 0 (REP_DELAY) Value 300 Repeat code 1 (REP_PERIOD) Value 33 Properties: Testing ... (interrupt to exit)
but there are never any events.
(I’m asking as I have it nicely hooked up to google voice recogniser via aiy. But it needs (and I want) a button press to trigger it. With a bit of twiddling hands free kits and bluetooth headsets work nicely with Raspian Stretch.)