On Darwin (Max OS X 10.7.4), I am using a "Garmin USB ANT stick" through libusb-1.0 to communicate with a "BC-1000 ANT+ Radio Wireless Body Composition Monitor".
The USB parts (init, find, open, claim) are working, I can send and receive ANT messages.
I am following the ANT-UserGuide.pdf and ANT_Weight_Scale_Device_Profile.pdf documentations.
The problem is that the scale is not turning on and the search is timing out.
* fyi: this scale do not have a power button, it power up automagically when a button is pressed on a watch (the light button on a Garmin Forerunner 210) or on the Tanita Display.
There must be something I did wrong? Maybe a step I must do to power up the scale before searching for it?
Please find below a log of an ANT session.
TX means data is sent to the stick, and RX means data is read from it.
I used the square brackets to denote an HEX number.
Thank you!
Send reset
TX:[A4][01][4A][00][EF]
RX:[A4][01][6F][00][CA]
Send key
TX:[A4][09][46][00][00][00][00][00][00][00][00][00][EB]
RX:[A4][03][40][00][46][00][A1]
Send channel assign (channel type = 0(slave), network = 0)
TX:[A4][03][42][00][00][00][E5]
RX:[A4][03][40][00][42][00][A5]
Send channel id (device number = 0(searching), device type = 199(the documentation said so), transmission type = 0(pairing))
TX:[A4][05][51][00][00][00][77][00][87]
RX:[A4][03][40][00][51][00][B6]
Send channel search timeout (0x01 seems to means like 10 seconds)
TX:[A4][02][44][00][01][E3]
RX:[A4][03][40][00][44][00][A3]
Send channel period (period = 8192 counts(4 Hz))
TX:[A4][03][43][00][20][00][C4]
RX:[A4][03][40][00][43][00][A4]
Send channel frequency (frequency = 57(2457 MHz))
TX:[A4][02][45][00][39][DA]
RX:[A4][03][40][00][45][00][A2]
Send channel open
TX:[A4][01][4B][00][EE]
RX:[A4][03][40][00][4B][00][AC]
Send request channel status
TX:[A4][02][4D][00][52][B9]
RX:[A4][02][52][00][02][F6] (02 = searching)
-
- last TX/RX repeated for a short while
-
Send request channel status
TX:[A4][02][4D][00][52][B9]
RX:[A4][02][52][00][02][F6] (02 = searching)
Received event
RX:[A4][03][40][00][01][01][E7] (01 = search timeout)
Received event
RX:[A4][03][40][00][01][07][E1] (07 = channel closed)
