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at3 senrcore channel slip

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Total Posts: 4

Joined 2013-08-24

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Hi there,

I have set up an at3 sensrcore module to transmit frequency counter data on 2 channels, plus temperature and battery on a 3rd channel.
Frequency data channels are each mapped to an ant channel, temperature and battery share one channel with 50% channel time each. All channels are set up for 4 Hz tx rate.

After app. 12 hours of operation appearently the channels overlap. Using a slave in continuous scanning mode I get the following pattern:

# inside datagram, column 4, fa, fb, fc -- the master channel id
# fa, fb are the frequency data channels, fc temperature and battery
# appended the timestamp on arrival of the slave datagram
# appended the delta (time to next datagram)

I would expect 3 datagrams in a burst every app. 250 ms. However, some datagrams seem to get lost.
Attached a longer and better readable log as well as the senrcore setup file.

-- datagram received from slave -- -- timestamp [ms] -- delta between messages [ms]
[0d 5d 00 fb 00 01 05 42 00 00 01 bb c8 96 f0] 
-- -- 8
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 16   -- 242
[0d 5d 00 fb 00 01 05 42 00 00 01 bb c8 96 f0] 
-- 258  -- 8
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 266  -- 250
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 516  -- 234
[0d 5d 00 fc 00 01 05 41 00 00 fe 19 65 7d 03] 
-- 750  -- 8
[0d 5d 00 fb 00 01 05 42 00 00 01 bb c8 96 f0] 
-- 758  -- 492
[0d 5d 00 fc 00 01 05 41 00 00 fe 19 65 7d 03] 
-- 1250 -- 266
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 1516 -- 250
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 1766 -- 484
[0d 5d 00 fc 00 01 05 41 00 00 fe 19 65 7d 03] 
-- 2250 -- 266
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 2516 -- 234
[0d 5d 00 fc 00 01 05 41 00 00 fe 19 65 7d 03] 
-- 2750 -- 16
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 2766 -- 250
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 3016 -- 242
[0d 5d 00 fb 00 01 05 42 00 00 01 bb c8 96 f0] 
-- 3258 -- 750
[0d 5d 00 fb 00 01 05 42 00 00 01 bb c8 96 f0] 
-- 4008 -- 492
[0d 5d 00 fc 00 01 05 41 00 00 fe 19 65 7d 03] 
-- 4500 -- 16
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 4516 -- 500
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 5016 -- 250
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 5266 -- 500
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 5766 -- 234
[0d 5d 00 fc 00 01 05 41 00 00 fe 19 65 7d 03] 
-- 6000 -- 8
[0d 5d 00 fb 00 01 05 42 00 00 01 bb c8 96 f0] 
-- 6008 -- 8
[0d 5d 00 fa 00 01 05 42 00 00 00 ca a9 8b ef] 
-- 6016 -- 500 


As all channels are set to the same channel rate I don't understand this error.

# The at3 module was programmed using antware II and develpment board usb bridge.
# Before programming existing scripts were erased (successfully, according to antware).
# Once powered up, the data transmission seems to be OK.
# The master is powered from 2 AAA batteries in series (->3V).
# I have already tried several slave modules and radio-frequency setups.

Any ideas?

TIA + Best Regards,

Peter      

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Total Posts: 662

Joined 2012-10-09

PM

Is there a particular reason you configured the channels as Tx only? Tx only channels disable the coexistence handling mechanism in ANT (the mechanism that allows ANT channels to avoid each other), so it may explain the issue you are seeing. Please try configuring the channels as bidirectional masters.      
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Total Posts: 4

Joined 2013-08-24

PM

Hi Alejandra,

thanks for the quick response. I will come back with results --
Peter