Banggood

I'm using this module with a Raspberry PI B+ in order to have a NTP Stratum 1 server. With the integrated antenna I can't detect satellites but with an external antenna on SMA port it's good (9 detected, 8 used). I'm using too the PPS output and it's working fine.

Arrived very well packed and unharmed. The built in antenna is also pretty good in my (suburban) area (works even indoor close to a window), however it needs a capacitor marked C2 (the only one not soldered) soldered. (I've used a ~100pF ceramic one, since I've found no guidance what value to use). This means that this is not for beginners (since it requires good soldering skills/station, good eyesight/magnifier unless one settles for external antenna only, which is in my view not required for outdoors). So

It's an excellent module (I've bought more of it) that has built in antenna (that works after soldering a capacitor) but best used with external antenna. I use the 1pps signal to provide very precise time reference. Highly recommended by me for this.

very accurate

Works well with external aerial, compared accuracy with other GPS modules and location on Google earth very good.

The onboard antenna has really poor reception, but works perfectly with an external antenna.

I easily found libraries and documentation on internet to use that module but it seems that I suffer from incomplete datas. As you can see on my picture. Does someone has the same problem ? And a fix ? Should I use an SMA antenna ? I'm using TinyGPS++ library. Is that a good library for that kind of module ?

Pro: It works with U-center, has external and internal antenna, USB. Con: The Ublox module is fake so there's a bit of misrepresentation. I bought two modules and both have the same serial number. Plus U-center reports the classic "Rom Core" message so no software upgrade. Sensitivity with the internal antenna is low with C2 installed.

This unit was sent (very quickly) to me after a previous one I bought presented problems. The problems remain, but I discovered that the on-board antenna produces a signal too weak to be used for a satellite fix, at least where I live. I bought an external antenna, and now everything works Ok. No problems in connecting to an Arduino, but the firmware cannot be updated.

Excellent functionality, usb, TTL and 1PPS, as well an option for an external antenna. Only drawback - if you want to use the internal antena you have to alter the device... Should be automatic.