ANT+ Devices dropping out during use

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20 November 2015 05:22 PM

ShaneG Moderator

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We have received some bug reports of some users seeing issues where they can use Android apps to connect to sensors, but after some period of time the sensors stop working correctly.

If this relates to you can you please report the:
-Android model
-Android version
-the app(s) you can reproduce this with
-any ideas of events that might be related to the drop out (e.g. stays connected for at least 5 minutes, or whenever my screen is off, etc.)

Also, if anyone has the technical expertise to capture logcat logs for this issue please let us know.

Hopefully we can resolve this soon as we get more information. Thanks!

related search terms: ANT+ HRM disconnecting from Android, ANT+ heart rate randomly failing, ANT+ sensor won't stay connected

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20 November 2015 05:25 PM #1

ShaneG Moderator

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We have received reports from other feedback so far:

Galaxy S5 - Endomondo
Galaxy S5 - Android 5.0 LRX21T.G900FXXU1BO13 - ipBike

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03 December 2015 10:40 PM #2

ShaneG Moderator

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Can anyone having this issue confirm if it is happening when also using bluetooth accessories, especially bluetooth headphones or speakers?

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27 December 2015 12:32 PM #3

aboya Newbie

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I can confirm issue definitely exists.
(https://www.youtube.com/watch?v=QbAxMvvhbyo)

When i use other software, that use bluetooth to communicate with my trainer - worked perfectly.
I have Tacx Genius Smart T2080. ( firmware:3.1.7/1.15.0 )
Phone: Lenovo ZUK z1. Android os 5.1.1 Cyanogen OS 12.1-YOG4PAS3OH.
Installed ANT radio service and ant plugin service(latest versions).

06 January 2016 01:58 PM #4

ShaneG Moderator

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Thanks aboya for the video. Can you test if turning bluetooth and wifi off make any difference?

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04 February 2016 05:00 AM #5

florian.zierer Newbie

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I have similar issues.

I have an Android test application based on the SDK Sample Acquire Channels Application. I am trying to send some data to (Android as Slave) or from (Android as Master) to antware with different messagerates (4Hz, up to 100Hz).
EventBuffering on the Android channel is disabled.

If I enable WIFI on my Sony Z1 Compact and the wifi is connected to my network, I get a lot of packet drops (EVENT_RX_FAILED). If I disable WIFI, everything looks good and nearly no packages are lost.

Sony Xperia Z1 Compact with Android 5.1.1

08 February 2016 05:58 PM #6

ShaneG Moderator

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Because WiFi, ANT, and BLE use the same radio they have to share. So high frequency channels, things like BT audio, WiFi streaming, etc. all negatively impact the radio time the other services will receive.

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05 April 2016 02:26 PM #7

rafarp Newbie

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Same here:

-Samsung Galaxy S6 - Endomondo.

Regards!

30 July 2016 01:51 AM #8

josefk Newbie

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Same problem here.

Mobile device: Samsung galaxy S5
Apps: Wahoo and IpBike

Worked fine until the end of biking season last year (november). But I never got it to work this year (2-3 weekly attempts since april). ANT+ sensors (heart rate and cadence) drops witin 15 min usage, mostly within 5 min usage. I have tried reinstallation of apps, repairing of sensors. Changed batteries. All I can think of.

19 August 2016 11:10 AM #9

ShaneG Moderator

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Is anybody here comfortable enabling developer mode and trying an app like https://github.com/tananaev/rootless-logcat to get logs? It doesn't require root or anything permanent like that.

If you use that app in combination with enabling full logging (https://www.thisisant.com/forum/viewthread/6283), we should be able to get some logs that give a good idea on what is happening.

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03 September 2016 04:53 PM #10

AntonioMachine Newbie

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Same here.

Mobile: Sony Xperia Z5 compact (Android 6.0.1)
Apps: Run.GPS and Endomondo
HRM bands: Any (tried with 3 brands)

Worked with my old mobile, but with the new one HRM disconnects. Sorry for my english

18 September 2016 01:12 PM #11

karlkras Newbie

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I'm having this issue with my Galaxy S5 v Android v6.0.1 (G900PVPU3CPG1)
Apps: Wahoo Fitness, S Health
Unit: Lemond Wattbox (speed and power sensor).

I can pair the Wattbox just fine for both power and speed, but will cut off and on in very short spurts.
Tried using only one mode (speed or power) and same issue.

How can I determine if this is an issue with the source (wattbox) or the phone?

Added:
I paired this unit with my Garmin 500 and it read the speed consistently, no drops, so I'm guessing this has something to do with the receiver on the phone.

18 September 2016 05:27 PM #12

karlkras Newbie

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aboya - 27 December 2015 12:32 PM
I can confirm issue definitely exists.
(https://www.youtube.com/watch?v=QbAxMvvhbyo)

When i use other software, that use bluetooth to communicate with my trainer - worked perfectly.
I have Tacx Genius Smart T2080. ( firmware:3.1.7/1.15.0 )
Phone: Lenovo ZUK z1. Android os 5.1.1 Cyanogen OS 12.1-YOG4PAS3OH.
Installed ANT radio service and ant plugin service(latest versions).

My connection is showing this same behavior. Has there been any changes to the status of this?

07 October 2016 08:57 AM #13

karlkras Newbie

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Joined 2016-09-18

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ShaneG - 19 August 2016 11:10 AM
Is anybody here comfortable enabling developer mode and trying an app like https://github.com/tananaev/rootless-logcat to get logs? It doesn't require root or anything permanent like that.

If you use that app in combination with enabling full logging (https://www.thisisant.com/forum/viewthread/6283), we should be able to get some logs that give a good idea on what is happening.

I'll give this a whirl this weekend. Nobody else has come forward to do this yet?

07 October 2016 11:15 AM #14

ShaneG Moderator

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Not yet, if you could that would be great! If the zipped logcat doesn't fit here, PM me and I can send you my email.

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11 October 2016 11:11 AM #15

ShaneG Moderator

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Can someone try disabling battery optimizations for the ANT Radio Service to see if it fixes it?
See https://www.thisisant.com/forum/ant-device-profiles/viewreply/7568/

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