[Shimmer-users] Shimmer: Problem with span platform

mike healy

2014-09-12 13:20:08 UTC

Hi Andre,

I've seen this happen in the past, normally in noisy RF environments. My
usual solution is to switch to a different, less congested, 802.15.4
channel. Occasionally I find that the Span (or more correctly the
BaseStation app) gets stuck in this state (i.e. all packets have a bad
CRC), so my general solution is to force a reset of the Span (I use tos-bsl
for this) if a packet with a bad CRC is detected. Whether or not this is a
suitable strategy for your purposes will obviously depend on your
application specifics (e.g. will the Span have time to reset between
packets).

Mike

Post by Andre Hoffmeyer
Hi *,
I have a weird problem with my shimmer. I use the span plattform to send
acc and gyro data from the shimmer to the pc. But sometimes the datapacket
are broken so that the packages have different packet size and the data are
rubbish. Has anyone ever had a something similar problem?
Warning: wrong CRC! 1b8a != 6e6 ['7e', ' 6', '1a', ' 7', '7b', ' 7', '62',
'1a', '42', ' 7', 'b9', '1a', '9b', ' 2', '85', ' 6', '1a', ' 7', '62', '
7', '5c', '1a', '1d', ' 7', '27', '1a', '67', ' 2', 'f8', ' 5', '58', ' 7',
'c1', ' 7', '9a', '1a', 'e2', ' 7', 'e3', '19', 'a3', ' 3', 'de', ' 6',
'99', ' 7', '78', '18', '79', '1a', 'e0', '18', '9d', ' 6', 'c3', ' 4',
'fe', ' 6', '18', '18', 'de', ' 7', 'b2', '1a', '5a', 'bf', 'fe', 'fe',
'85', ' 0', ' 0', ' 0', ' 0', ' 1', 'c4', '42', 'ff', 'a5', '3c', '65', '
7', ' 4', '1a', 'c5', ' 2', '5c', ' 6', '83', ' 7', '5f', '18', '65', '1a',
'70', ' 6', '1f', '19', ' 7', ' 3', '61', ' 6', '23', ' 7', 'c4', ' 7',
'8a', '1a', '80', ' 6', '4c', '1a', 'dd', ' 2', 'bf', ' 6', '5f', ' 7', '
7', '18', '3b', '1a', 'a7', ' 6', 'b1', '1a', 'a7', ' 3', '1f', ' 6', 'f9',
' 7', 'e2', ' 8', 'c0', '1a', 'e5', ' 6', 'e6', ' 9', 'a5', ' 3', '82', '
6', '23', ' 7', 'e4', ' 7', 'a5', '1a', 'a7', ' 7', '59', '19', '9e', ' 4',
'1e', ' 7', 'fd', 'be', ' 7', 'e3', '18', 'c1', '1a', 'de', ' 7', '1b',
'19', '98', ' 2', 'e6', ' 6', '7e']
[185, 26, 155, 2, 133, 6, 26, 7, 98, 7, 92, 26, 29, 7, 39, 26, 103, 2,
248, 5, 88, 7, 193, 7, 154, 26, 226, 7, 227, 25, 163, 3, 222, 6, 153, 7,
120, 24, 121, 26, 224, 24, 157, 6, 195, 4, 254, 6, 24, 24, 222, 7, 178, 26,
90, 191, 254, 254, 133, 0, 0, 0, 0, 1, 196, 66, 255, 165, 60, 101, 7, 4,
26, 197, 2, 92, 6, 131, 7, 95, 24, 101, 26, 112, 6, 31, 25, 7, 3, 97, 6,
35, 7, 196, 7, 138, 26, 128, 6, 76, 26, 221, 2, 191, 6, 95, 7, 7, 24, 59,
26, 167, 6, 177, 26, 167, 3, 31, 6, 249, 7, 226, 8, 192, 26, 229, 6, 230,
9, 165, 3, 130, 6, 35, 7, 228, 7, 165, 26, 167, 7, 89, 25, 158, 4, 30, 7,
253, 190, 7, 227, 24, 193, 26, 222, 7, 27, 25, 152, 2]
Warning: wrong CRC! 3d64 != 1981 ['7e', '1a', 'b7', '18', '58', '19',
'fa', ' 2', '1e', ' 6', '46', ' 7', '8c', ' 7', '7b', '1a', 'ff', '18',
'77', '19', 'd8', ' 2', '19', ' 6', '46', ' 7', '98', ' 7', '79', '1a',
'fd', 'bd', '18', '85', '19', 'c0', ' 2', 'fd', 'bd', ' 6', '27', ' 7',
'b8', ' 7', '82', '1a', 'bb', '7f', 'fe', ' 0', ' 0', ' 0', ' 0', ' 0', '
0', ' 1', 'c4', '42', 'ff', 'a5', '40', 'a2', '18', 'bd', '19', 'fa', ' 2',
'5f', ' 6', '1c', ' 7', '7c', ' 7', '61', '1a', '67', '18', 'a5', '19',
'98', ' 2', 'b9', ' 6', '44', ' 7', 'bf', ' 7', '9b', '1a', '47', '18',
'b6', '19', 'a6', ' 2', 'c7', ' 6', '7c', ' 7', '27', '18', '47', '1a', '
4', '18', '60', '19', '1e', ' 3', ' 1', ' 6', 'a6', ' 7', '63', '18', '67',
'1a', ' 0', '18', 'bf', '19', '18', ' 3', 'a4', ' 5', 'c7', ' 7', 'b8',
'18', '9e', '1a', 'e3', '18', '5b', '19', 'bc', ' 2', '9b', ' 6', 'ff', '
7', '32', '18', '60', '1a', '80', '18', 'a2', '19', '38', ' 3', '67', ' 6',
'f8', ' 7', '1f', '18', '5c', '1a', 'bd', '23', 'fe', ' 0', ' 0', ' 0', '
0', ' 0', ' 0', ' 1', 'c4', '42', 'ff', 'a5', '41', '36', '18', '5e', '19',
'5e', ' 2', '19', ' 6', '7a', ' 7', '3e', '18', '5b', '1a', '5a', '18',
'62', '19', '5e', ' 3', '44', ' 6', '63', ' 7', 'e7', ' 7', 'b9', ' a',
'7a', '18', 'e1', '19', '42', ' 3', '22', ' 6', '41', ' 7', '8a', ' 7',
'7c', '1a', '23', '18', 'a5', ' 8', '8a', ' 2', '66', ' 6', '80', ' 7',
'e3', ' 7', 'a6', '1a', '7b', ' 8', 'c3', '19', '3b', ' 3', '21', ' 6',
'48', ' 7', '9f', ' 7', '7f', '1a', '83', '18', 'c3', '19', '78', ' 2',
'1f', ' 6', '27', ' 7', '62', ' 7', '5c', '1a', '39', ' 8', '5f', '19', '
1', ' 3', 'a4', ' 5', '86', ' 7', ' 1', '18', '26', '1a', '5b', '1a', 'fe',
' 0', ' 0', ' 0', ' 0', ' 0', ' 0', ' 1', '64', '42', 'ff', 'a5', '42',
'20', '18', '81', '19', '7e']
[70, 7, 140, 7, 123, 26, 255, 24, 119, 25, 216, 2, 25, 6, 70, 7, 152, 7,
121, 26, 253, 189, 24, 133, 25, 192, 2, 253, 189, 6, 39, 7, 184, 7, 130,
26, 187, 127, 254, 0, 0, 0, 0, 0, 0, 1, 196, 66, 255, 165, 64, 162, 24,
189, 25, 250, 2, 95, 6, 28, 7, 124, 7, 97, 26, 103, 24, 165, 25, 152, 2,
185, 6, 68, 7, 191, 7, 155, 26, 71, 24, 182, 25, 166, 2, 199, 6, 124, 7,
39, 24, 71, 26, 4, 24, 96, 25, 30, 3, 1, 6, 166, 7, 99, 24, 103, 26, 0, 24,
191, 25, 24, 3, 164, 5, 199, 7, 184, 24, 158, 26, 227, 24, 91, 25, 188, 2,
155, 6, 255, 7, 50, 24, 96, 26, 128, 24, 162, 25, 56, 3, 103, 6, 248, 7,
31, 24, 92, 26, 189, 35, 254, 0, 0, 0, 0, 0, 0, 1, 196, 66, 255, 165, 65,
54, 24, 94, 25, 94, 2, 25, 6, 122, 7, 62, 24, 91, 26, 90, 24, 98, 25, 94,
3, 68, 6, 99, 7, 231, 7, 185, 10, 122, 24, 225, 25, 66, 3, 34, 6, 65, 7,
138, 7, 124, 26, 35, 24, 165, 8, 138, 2, 102, 6, 128, 7, 227, 7, 166, 26,
123, 8, 195, 25, 59, 3, 33, 6, 72, 7, 159, 7, 127, 26, 131, 24, 195, 25,
120, 2, 31, 6, 39, 7, 98, 7, 92, 26, 57, 8, 95, 25, 1, 3, 164, 5, 134, 7,
1, 24, 38, 26, 91, 26, 254, 0, 0, 0, 0, 0, 0, 1, 100, 66, 255, 165, 66, 32,
24]
Warning: wrong CRC! bdb3 != 7a0 ['7e', '1a', 'a3', ' 4', '5b', ' 3', '22',
' 0', '64', 'be', ' 4', ' 7', 'e4', ' 7', 'a5', '1a', '87', '18', '3f', '
5', '24', ' 0', 'be', ' 4', '79', ' 7', ' 3', '18', '27', '1a', '39', ' 7',
'86', ' 7', '20', '79', ' 5', '46', ' 7', 'a5', ' 7', '85', '1a', '7f',
'18', '7f', '18', 'bb', ' 2', '43', ' 6', '5a', ' 7', 'a0', ' 7', '7e']
[4, 7, 228, 7, 165, 26, 135, 24, 63, 5, 36, 0, 190, 4, 121, 7, 3, 24, 39,
26, 57, 7, 134, 7, 32, 121, 5, 70, 7, 165, 7, 133, 26, 127, 24, 127, 24,
187, 2, 67, 6, 90, 7]
Warning: wrong CRC! 0 != 87e ['7e', ' 8', '7e']
skipping truncated packet
*Thank you very much in advance!*
*King regards,*
*Andre*
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