GPS accuracy with Seeeduino LoRaWAN w/GPS

Products & Technology Arduino & Seeeduino
#1

Is it fair to say the GPS on board the Seeeduino LoRaWAN w/GPS has low accuracy?



We’ve been collecting location data on a few units and have found that:

  • the HDOP looks suspect (starts at 0, sometimes just increments, bounces around a bit)
  • the altitude varies by 10’s of metres
  • the location moves around a area with a radius of about 80m with a stationary device, even when HDOP is <5.



    I think maybe it’s handy to have a GPS on board to get the time and rough location, but it’s not much use for sub-10m use.



    We’ll be evaluating the Grove GPS next. I hope the SIM28 performs better!
#2

Hi there,



please try and let us know. i checked SIM28 and L70 datasheet. it looks no big differences.

http://simcomm2m.com/En/module/detail.aspx?id=89

<LINK_TEXT text=“https://www.quectel.com/UploadFile/Prod … n_V2.3.pdf”>https://www.quectel.com/UploadFile/Product/Quectel_L70_GPS_Specification_V2.3.pdf</LINK_TEXT>

thanks.

#3

Spectacularly better. Very fast fix (too fast to time), even indoors, and a positional deviation of less than one metre when stationary outdoors.



The instructions on the GroveGPS web page didn’t work though - I had to connect to D3 and change the pins to 3, 4.