No working simplertk2b

Q&A forumCategory: QuestionsNo working simplertk2b
nemanjamnn02 asked 2 weeks ago

Hi. 
I’ve got SimpleRTK2b board, GNSS antenna (BT-147), and tried to connect it to win7 program AgOpenGPS to simulate work. When I connect it all, let 15 min on same place, it just sends NMEA messages, and there is “No GPS” (No location, lost). When I try with some ordinary small antenna without SimpleRTK2b, it normally shows location and works normally. I don’t know what is wrong. 

Ardusimple Staff replied 2 weeks ago

Dear nemanajamnn02,

We don’t know BT-147 antenna.

1. simpleRTK2B antenna power supply is 3.3V. Does your antenna support 3.3V or needs 5V?

2. simpleRTK2B maximum antenna current is 75mA. Does your antenna need more than 75mA ?

3. If you have another GPS antenna try with a different GPS antenna.

nemanjamnn02 replied 2 weeks ago

Current is less than 45mA but voltage is 3.0V-18.0V, I think it is okay, right?

Ardusimple Staff replied 2 weeks ago

mmm, voltage should be defined at a certain voltage. If your antenna is 45mA @ 12V simpleRTK2B will not be able to power it.

Do you have another GPS antenna? Even if it’s a single band gps antenna. just to check if this is the problem

nemanjamnn02 replied 2 weeks ago

Ok, I found some antennas, I gonna test it now and I will tell you situation..

nemanjamnn02 replied 2 weeks ago

I finished testing. I did it with one other antenna. It worked normally and GPS fix was blinking, means problem is in antenna. I also have another BT-147 antenna, but it’s same as with first one. But tell me what are basic specifications I need for antenna to use it with simpleRTK2B? I don’t know what type of antenna is one which worked properly.. it is possibly single band.

Ardusimple Staff replied 2 weeks ago

Hi nemanjamnn02,

It could be that your BT-147 actually needs more than 75mA at 3.3V, and that the 45mA are only at 12V. In this case simpleRTK2B doesn’t have enough power for this antenna. It’s just a guess, without seeing it in person it’s difficult.

nemanjamnn02 replied 2 weeks ago

Alright, thank you very much for help:)