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kalamaja
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LtAP Mini GPS useless without antenna

Wed Jul 04, 2018 3:30 pm

Hello.

Is it an intended behaviour that LtAP Mini's internal GPS feature is useless without adding external antenna (= ACGPSA+ACSMAUFL)? I see GPS data running in the logs but have not been able to get any position lock. As USB port is for power only I'm also unable to add USB GPS module.
 
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normis
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Re: LtAP Mini GPS useless without antenna

Wed Jul 04, 2018 4:27 pm

Most likely you have not disabled "/system console" and set the GPS menu to use serial0. Please do these things and only then GPS will work.
External antenna is optional, but will work much better.
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kalamaja
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Re: LtAP Mini GPS useless without antenna

Wed Jul 04, 2018 10:08 pm

Software and firmware 6.42.5, fresh default configuration. What I do:
/system console disable 0
/system gps set port=serial0 enabled=yes
Resulting in:
/port
set 0 baud-rate=auto data-bits=8 flow-control=none name=serial0 parity=none stop-bits=1
/port firmware
set directory=firmware ignore-directip-modem=no
/system gps
set channel=0 enabled=yes gps-antenna-select=internal init-string="" port=serial0 set-system-time=no
If I set GPS logging, I see GPS data running. The only change I see is that date changes from Nov/30/1999 00:00:00 to Jan/06/1980 00:02:30 (GPS start era).

Jul/04/2018 21:47:25 gps,raw GPS:: $GPGGA,001014.020,,,,,0,0,,,M,,M,,*4E
Jul/04/2018 21:47:25 gps,raw GPS:: $GPGLL,,,,,001014.020,V,N*7C
Jul/04/2018 21:47:25 gps,raw GPS:: $GPGSA,A,1,,,,,,,,,,,,,,,*1E
Jul/04/2018 21:47:25 gps,raw GPS:: $GPGSV,1,1,00*79
Jul/04/2018 21:47:25 gps,raw GPS:: $GPRMC,001014.020,V,,,,,0.00,0.00,060180,,,N*44
Jul/04/2018 21:47:25 gps,raw GPS:: $GPVTG,0.00,T,,M,0.00,N,0.00,K,N*32
Jul/04/2018 21:47:26 gps,raw GPS:: $GPGGA,001015.020,,,,,0,0,,,M,,M,,*4F
Jul/04/2018 21:47:26 gps,raw GPS:: $GPGLL,,,,,001015.020,V,N*7D
Jul/04/2018 21:47:26 gps,raw GPS:: $GPGSA,A,1,,,,,,,,,,,,,,,*1E
Jul/04/2018 21:47:26 gps,raw GPS:: $GPGSV,1,1,00*79
Jul/04/2018 21:47:26 gps,raw GPS:: $GPRMC,001015.020,V,,,,,0.00,0.00,060180,,,N*45
Jul/04/2018 21:47:26 gps,raw GPS:: $GPVTG,0.00,T,,M,0.00,N,0.00,K,N*32
Jul/04/2018 21:47:27 gps,raw GPS:: $GPGGA,001016.020,,,,,0,0,,,M,,M,,*4C
Jul/04/2018 21:47:27 gps,raw GPS:: $GPGLL,,,,,001016.020,V,N*7E
Jul/04/2018 21:47:27 gps,raw GPS:: $GPGSA,A,1,,,,,,,,,,,,,,,*1E
Jul/04/2018 21:47:27 gps,raw GPS:: $GPGSV,1,1,00*79
Jul/04/2018 21:47:27 gps,raw GPS:: $GPRMC,001016.020,V,,,,,0.00,0.00,060180,,,N*46
Jul/04/2018 21:47:27 gps,raw GPS:: $GPVTG,0.00,T,,M,0.00,N,0.00,K,N*32
....

Am I missing smth?

With mAP 2nd + BU-353S4 USB GPS module I'm able to get location fixed literary in seconds.
 
jebz
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Re: LtAP Mini GPS useless without antenna

Thu Jul 05, 2018 5:07 pm


Am I missing smth?

With mAP 2nd + BU-353S4 USB GPS module I'm able to get location fixed literary in seconds.
.
Patients, please wait. A new GPS can take up to half an hour the first time. Many GPS have small batteries to assist in regaining their values more quickly after a restart.
 
mgisbers
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Re: LtAP Mini GPS useless without antenna

Thu Jul 05, 2018 6:16 pm

I've got same problem here. Console is disabled and serial0 is assigned to gps.

After enable of gps I can see gps,raw messages within the logfile. Even after 6 hours - which should be enough time to sync - it shows that there is not even a single satellite found.

I even tried two ltap mini, one of them with stock configuration. Both with 6.42.5 packages.

And, of course, both testet outside with free sky view.
 
korniza
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Re: LtAP Mini GPS useless without antenna

Sun Jul 08, 2018 6:53 pm

same here. I was lucky and bought an external antenna.
In real life there is no internal antenna for gps connected.
Also GPS led it stays off when there is no satellite connected. This led can not be used for any other function.
 
nemke
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Re: LtAP Mini GPS useless without antenna

Fri Jul 13, 2018 7:00 pm

Same problem. Put LtAP on roof of the house in clear sky.
GPS enabled. Wait 2h and nothing, no GPS data. In logs there are gps traffic
Used with internet antena, didn't buy and attach external one. Will external antena correct problem ?
LTE work normaly.

Nemanja
 
nemke
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Re: LtAP Mini GPS useless without antenna

Fri Jul 13, 2018 10:25 pm

And, is it possibe to use other external GPS antenas with SMA, not only MT (ACGPSA) ?
https://www.amazon.de/Teltonika-GPS-GNS ... B077C66RTK
Like this, for example
 
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normis
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Re: LtAP Mini GPS useless without antenna

Mon Jul 16, 2018 10:13 am

Same problem. Put LtAP on roof of the house in clear sky.
GPS enabled. Wait 2h and nothing, no GPS data. In logs there are gps traffic
Used with internet antena, didn't buy and attach external one. Will external antena correct problem ?
LTE work normaly.

Nemanja
It means GPS data goes to console, see my previous responses. Turn off serial console in RouterOS, then set GPS menu to use Serial0
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nemke
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Re: LtAP Mini GPS useless without antenna

Mon Jul 16, 2018 9:29 pm

Same problem. Put LtAP on roof of the house in clear sky.
GPS enabled. Wait 2h and nothing, no GPS data. In logs there are gps traffic
Used with internet antena, didn't buy and attach external one. Will external antena correct problem ?
LTE work normaly.

Nemanja
It means GPS data goes to console, see my previous responses. Turn off serial console in RouterOS, then set GPS menu to use Serial0
Done that. I read all post, especialy reply from MT support...

[admin@Brod Pozerveac 6] > system console disable 0
[admin@Brod Pozerveac 6] > system console print
Flags: X - disabled, U - used, F - free
# PORT TERM
0 X serial0 vt102
[admin@xxxxxxxxxx] > system console set disabled=yes 0
[admin@xxxxxxxxxx] > system gps print
enabled: yes
port: serial0
channel: 0
init-string:
set-system-time: no
gps-antenna-select: internal
[admin@xxxxxxxxxx] > system console print
Flags: X - disabled, U - used, F - free
# PORT TERM
0 X serial0 vt102
[admin@xxxxxxxxxx] > system gps
[admin@xxxxxxxxxx] /system gps> monitor
date-and-time: jan/06/1980 00:13:34
latitude: none
longitude: none
altitude: 0.000000m
speed: 0.000000 km/h
destination-bearing: none
true-bearing: 0.000000 deg. True
magnetic-bearing: 0.000000 deg. Mag
valid: no
satellites: 0
fix-quality: 0
horizontal-dilution: 0
-- [Q quit|D dump|C-z pause]
[admin@xxxxxxxxxx] > system package print
Flags: X - disabled
# NAME VERSION SCHEDULED
0 routeros-mipsbe 6.42.6
1 system 6.42.6
2 X ipv6 6.42.6
3 wireless 6.42.6
4 hotspot 6.42.6
5 dhcp 6.42.6
6 mpls 6.42.6
7 routing 6.42.6
8 ppp 6.42.6
9 security 6.42.6
10 advanced-tools 6.42.6
11 gps 6.42.6
[admin@xxxxxxxxxx] > system routerboard print
routerboard: yes
board-name: LtAP mini
model: RB912R-2nD
serial-number: 8F00099D99FB
firmware-type: qca9531L
factory-firmware: 6.42.1
current-firmware: 6.42.6
upgrade-firmware: 6.42.6


LtAP is on roof for 3h and stil no fix.
 
HenryChinaski
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Re: LtAP Mini GPS useless without antenna

Tue Jul 17, 2018 1:45 am

Hi!

I think i got the same issue, any solution?

Ltap Mini, no external antenna. No GPS data

Thanks, henry
 
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normis
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Re: LtAP Mini GPS useless without antenna

Tue Jul 17, 2018 7:49 am

Try external antenna, does it get a fix then? How soon? Are you guys using the LTE modem?
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mgisbers
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Re: LtAP Mini GPS useless without antenna

Tue Jul 17, 2018 9:40 am

Try external antenna, does it get a fix then? How soon? Are you guys using the LTE modem?
Hi, just bought an external antenna. Will report after check.

With one of my LtAPs I tried to use GPS in addition to LTE with the other one I used GPS only with disabled LTE. Both of them showed the same result: no satellites found.

I will now start drilling a hole and put an antenna to one of them.
 
kalamaja
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Re: LtAP Mini GPS useless without antenna

Tue Jul 17, 2018 9:51 am

Try external antenna, does it get a fix then? How soon? Are you guys using the LTE modem?
GPS-data in the log is self-generated (GPGGA, GPGLL, GPGSA, GPGSV etc) so no actual traffic from sattellites. I've run it on internal antenna for tens of hours in open air, powered from USB while driving, submitting coordinates over LTE using demo application, and for all that time only ONCE it has been able to send non-zero coordinates.
 
rzirzi
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Re: LtAP Mini GPS useless without antenna

Tue Jul 17, 2018 7:51 pm

I have the same problem wit my brand new LtAP mini LTE kit - no GPS signal receiving :(
I have configured like in that example: https://wiki.mikrotik.com/wiki/Manual:System/GPS
GPS module is not receiving coordinations:(((( Should I send it to RMA?
 
nemke
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Re: LtAP Mini GPS useless without antenna

Tue Jul 17, 2018 8:06 pm

Hello
Problem iz with internal antena. I buy externat, plug it, and imediatly GPS show cordinate.
[admin@xxxxxxxxxxx] > system gps monitor
date-and-time: jul/17/2018 16:59:06
latitude: N 44 50' 40.98''
longitude: E 20 24' 35.142''
altitude: 107.400002m
speed: 0.018520 km/h
destination-bearing: none
true-bearing: 157.399994 deg. True
magnetic-bearing: 0.000000 deg. Mag
valid: yes
satellites: 10
fix-quality: 1
horizontal-dilution: 1.04

I try with GPS antena internal or externel in settup, it work in any case, WITH EXTERNAL GPS antena connected to LtAP. LtAP is IN SAME PLACE like in previsus tests when there is no GPS data.
So, I think that internal antena is bud desine, OR LTE antena make interfirance or block GPS signal.
I will try to remove cover from LtAP and/or disable LTE.

I will post answer
 
nemke
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Re: LtAP Mini GPS useless without antenna

Tue Jul 17, 2018 8:32 pm

Spend some time testing this. Have device in front of me so I can easy make tests.

I try to:
1. reset LtAP to default, and start from 0
2. remove cover, LTE and WIFI enabled - no GPS,
3. removed cover, LTE and WIFI disabled - no GPS
4. Cover on, disable LTE and WIFI - no GSP
and so on ......

So I try any of combination with cover, LTE and WIFI, and IN ANY CASE GPS DON'T WORK WITHOUT EXTERNAL ANTENNA in my case.

For me that is not problem to have antenna, but will be much easy if MT sell GPS antenna WITH device, in same box, not like separate accessory so You can buy it or not.
For 10$ more, you have complete thing. It will save time and testing and garantie good service.
LTE work OK, with integrated antenna,no problem for now. Only GPS have problem.
For test didn't buy and use MT GPS antena, I use ARKNAV A-130 external antenna with 5m cable


GPS realy work now, so for me this is solved

Thank you
Nemanja
 
HenryChinaski
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Re: LtAP Mini GPS useless without antenna

Tue Jul 17, 2018 10:29 pm

Ok,

So it seems for GPS working on Ltap Mini Antenna is mandatory?

Could Mikrotik Support confirm this? I bought my ltap mini abroad, no mikrotik Antenna in my country. What kind of antenna and pigtail i have to look for?

Thanks.
 
nemke
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Re: LtAP Mini GPS useless without antenna

Wed Jul 18, 2018 12:14 am

Ok,

So it seems for GPS working on Ltap Mini Antenna is mandatory?

Could Mikrotik Support confirm this? I bought my ltap mini abroad, no mikrotik Antenna in my country. What kind of antenna and pigtail i have to look for?

Thanks.
https://mikrotik.com/product/acsmaufl this one for GPS and for LTE (if yuo need external antenna) I buy 3 peaces of this pigtail, two are for external LTE antena and one for GPS antena
My GPS antenna has SMA connector so it fits to this pigtail.
 
rzirzi
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Re: LtAP Mini GPS useless without antenna

Wed Jul 18, 2018 2:01 pm

MikroTik team - could You answer to this topic? Where is a problem with LtAP and GPS?
 
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normis
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Re: LtAP Mini GPS useless without antenna

Wed Jul 18, 2018 2:04 pm

We are seeing that the internal antenna becomes compromised when LTE is used, so for the time being, MikroTik recommends using an external antenna with these devices, if accuracy and speed of acquisition are paramount. We will try to resolve the issue, or adjust the product information, depending on our findings.
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HenryChinaski
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Re: LtAP Mini GPS useless without antenna

Wed Jul 18, 2018 6:03 pm

Normis.

Hi.

When you say "LTE Is used" you mean, LTE card present? Service active ? Or interface up?

Im not using LTE service in my tests so this should not be an issue.

I Will try to buy an antenna for further testing.

Is GPS service more accurate while using LTE?

Sorry if this questions are so basic. Im new to this GPS/LTE World

I found ltap device amazing hardware. I Will continue with this tests and post results

Henry
 
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normis
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Re: LtAP Mini GPS useless without antenna

Thu Jul 19, 2018 9:21 am

In that case, remove the LTE card, and also try to mount it differently, with serial port pointing up
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kalamaja
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Re: LtAP Mini GPS useless without antenna

Fri Jul 20, 2018 8:41 pm

In that case, remove the LTE card, and also try to mount it differently, with serial port pointing up
I see no difference from disabling or removing LTE card: no luck. Tested with external MT GPS module: gets fix in seconds and 6-8 sattellites always visible. What I see on 6.43rc44 is that when external antenna is connected then there's no difference of switching antenna parameter to external or internal, always the same result as with external antenna.

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