Wio LTE GNSS antenna circuit not according to reference in datasheet?

Products & Technology Wio Series
#1

I’m using the Wio Lte Cat.1 v1.3b (EC21-E) and was trying to get a fix on the integrated GNSS without success so far. I’m trying with the included GPS antenna, outside, under open sky and for over 10 minutes. But its just keeping responding +CME ERROR: 516 - which according to the datasheet translates to “no fix yet”
I confirmed the ANT_POWR is enabled. Then sending following AT commands and successfully receiving OKs:
AT
ATE0
AT+QGPSEND (here of course I get an error if it was not enabled before)
AT+QGPS=4,120,50,0

and then every 5 seconds:
AT+QGPSLOC=1

Now I was wondering why the PCB layout is so different from the actual recommondation of Quectel. So before I’m going to take the solder-iron and try to get it closer to Quectels suggestions: might there be anything else what I missed, what might keep the GPS part of the EC21 from working??

Happy to hear your ideas.

For the reference here the Quectel Datasheet and Schematics:

WIO LTE Cat1 GNSS Antenna
WIO LTE Cat1 GNSS Antenna1000×492 37.5 KB

#2

@kevin.yang.live What do you think of this problem? I’m sure your engineers can answer it.

#3

Did you find the answer? I’m doing something similar and it’s important for me to know the answer to your question:)

#4

Hello again:) I’m still wondering… Did you find the answer? I’m doing something similar and it’s important for me to know the answer to your question:) For this period, I ordered a printed circuit Board, I need only one sample and so I found a service that deals with pcb basics . I’m creating a device that I will use to control my bus. My wife and I love to travel and we have a bus, this is our mobile home. Sometimes we want to come to a warm place after a walk and turn on the air conditioner through a special remote control. What do you think about my idea?