The OP's GPS output is pretty normal. One shot shows NMEA sentences with no sat data. The other shows sat data but no positional data.
I reckon that at some point it will get positional data.
The problem is: how to identify the reason for not getting a fix in a short time (say less than 15 mins)?
John.
HillmanImp:
The OP's GPS output is pretty normal. One shot shows NMEA sentences with no sat data. The other shows sat data but no positional data.I reckon that at some point it will get positional data.
The problem is: how to identify the reason for not getting a fix in a short time (say less than 15 mins)?
John.
However , I stayed 1 hour at outside. Should I try again?
Are you able to measure the volts at the board's VCC & Gnd pins?
John.
HillmanImp:
I reckon that at some point it will get positional data.
At the signal strengths indicated, its unlikley to get a fix at all.
srnet:
At the signal strengths indicated, its unlikley to get a fix at all.
That's a valid comment, Stewart. However, I've had the situation where the board does not get a fix all day and gets a fix the next day. In the same position.
I also get the situation where several sats give strong signals but the receiver still does not get a fix.
One thing tho, it does work consistently well sitting on the dash of my car.
John.
HillmanImp:
Are you able to measure the volts at the board's VCC & Gnd pins?John.
I have measured 5.2 volts
HillmanImp:
However, I've had the situation where the board does not get a fix all day and gets a fix the next day. In the same position.
That can happen if there are say 3 or 4 signals that are hovering araound the margin.
However in the case shown, all the signals are well below the margin, and not even one of them is strong enough for the GPS to read the time.
5.2v is good.
I would say try another day.
The experts say a ground plane helps. This is simply a metal sheet under the GPS board. A car's roof provides a ground plane.
John.
At this point, I'd suspect either the hardware or some kind of interference. If you're testing at work maybe there's something transmitting on a frequency that's messing with the GPS, deliberately or not. Can you get a position with a GPS equipped cell phone? Don't forget that the phone may estimate its position from nearby cell towers if it can't get a GPS fix.
Maybe try taking your kit some miles away and try again.
wildbill:
At this point, I'd suspect either the hardware or some kind of interference. If you're testing at work maybe there's something transmitting on a frequency that's messing with the GPS, deliberately or not. Can you get a position with a GPS equipped cell phone? Don't forget that the phone may estimate its position from nearby cell towers if it can't get a GPS fix.Maybe try taking your kit some miles away and try again.
I tried at night because of high quality. So, there was no sunspot. I think this module is powerless for my location. I think I will try a new module with a bigger antenna. Thanks for your helps
Please keep us informed of your progress. We are all learning.
Good luck.
John.