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18 January 2021 09:39 PM

Total Posts: 1

Joined 2020-05-14

I am using the OpenAnt library https://github.com/Tigge/openant on a Raspberry Pi 3 (Raspbian Buster) and Dynastream Innovations, Inc. ANTUSB2 Stick.

My script runs in "open_rx_scan_mode" and receives data from all sensors within range.

Part of the script:

self.channel = self.node.new_channel(Channel.Type.BIDIRECTIONAL_RECEIVE, 0x00, 0x00)
        self.channel.on_broadcast_data = self.on_data
        self.channel.on_burst_data = self.on_data
        self.channel.on_acknowledge = self.on_data
        self.channel.on_acknowledge_data = self.on_data_ack
        self.channel.set_id(0, 0, 0)
        self.channel.set_period(0)
        self.channel.set_rf_freq(57)
        self.channel.enable_extended_messages(1) 

Everything works fine, but after a while the data from the ANT + stick stops coming.This can happen in 5 minutes or in half an hour,

Restarting the script after this does not help.. The script runs, but no data arrives. It only helps if you unplug and plug again ant + stick or restart Raspberry pi.

Part of the log file at this moment:

DEBUG:ant.base.ant:Got broadcast data, examine queue to see if we should send anything back
DEBUG:ant.base.ant: - no messages in queue
DEBUG:ant.base.ant:Got broadcast data, examine queue to see if we should send anything back
DEBUG:ant.base.ant: - no messages in queue
DEBUG:ant.base.ant:Got broadcast data, examine queue to see if we should send anything back
DEBUG:ant.base.ant: - no messages in queue
DEBUG:ant.base.ant:Got broadcast data, examine queue to see if we should send anything back
DEBUG:ant.base.ant: - no messages in queue
DEBUG:ant.base.ant:Read data: [] (now have [] in buffer)
DEBUG:ant.base.ant:Read data: [] (now have [] in buffer)
DEBUG:ant.base.ant:Read data: [] (now have [] in buffer)
DEBUG:ant.base.ant:Read data: [] (now have [] in buffer)
DEBUG:ant.base.ant:Read data: [] (now have [] in buffer)
DEBUG:ant.base.ant:Read data: [] (now have [] in buffer)
DEBUG:ant.base.ant:Read data: [] (now have [] in buffer)
DEBUG:ant.base.ant:Read data: [] (now have [] in buffer) 

and another case:

DEBUG:ant.base.ant:Got broadcast data, examine queue to see if we should send anything back
DEBUG:ant.base.ant: - no messages in queue
DEBUG:ant.base.ant:Read data: [a4 03 40 00 01 34 0e 4e 00 00 ff ff ff 93 55 6c 01 80 47 fe 7a c5 36 a4 0e 4e 00 85 00 ff ff 46 f8 4c 00 80 c4 23 7b 75 fa] (now have [a4 03 40 00 01 34 0e 4e 00 00 ff ff ff 93 55 6c 01 80 47 fe 7a c5 36 a4 0e 4e 00 85 00 ff ff 46 f8 4c 00 80 c4 23 7b 75 fa] in buffer)
DEBUG:ant.base.ant:Ant runner stopped 

The script continues to run and does not give any errors.
DMESG shows no errors.

Tried to reproduce this problem on two different Raspberry pi 3 with two different ANT + sticks. On both, the problem is repeated.

18 February 2021 06:43 PM #1

Harrison Administrator

Total Posts: 745

Joined 2012-09-14

I don't see any issues with the ANT USB messages themselves, I'd recommend filing an issue with the maintainer of the repository to see if they've seen this before.

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Ant+ stick stops responding after a while (Openant Raspberry Pi)