GPS works but u-center but impossible to upgrade the GPS firmware to the latest revision (and I have not found anywhere to get firmware upgrade on that chinese brand) nor deactivate beidou satellites. You can turn off all the other ones but not beidou. For my arduino experimentation, it's fine and precision is there with external antenna. Read more

These little GPS units were so simple to hook up using the included header or just soldering wires onto the proper places on the board. VCC, Ground, TXD, RXD and the PPS pins are easily accessed on the board making connection a breeze! Time to first fix was very quick compared to other units I've used in the past, but these are great. Lots of details are still available on this older model GPS with a little digging you'll find most anything you need to know. Downloaded the U-Connect software from U-BLOX and it immediately located the unit on a USB serial port. Once selected in the software, it started communicating as expected nearly immediately. These will easily serve my needs for the projects I got them for and I'll consider them top of the list for the next projects as well. Read more

Two U-Blox 7 modules with antennas for 18 bucks, work as expected out of the box, no issues, nothing not to like. If you have a Linux box, you can get on the air with these babies in about 2 minutes: The first 1:55 with an eye loupe to connect the antenna, the last 5 seconds to plug it into a USB port. Reports USB device info as follows: idVendor = 0x1546 (U-Blox) idProduct = 0x01a7 (U-blox 7) which is then claimed by low-level ACM driver cdc_acm and shows up as /dev/ttyACMn, 9600 bps, 8N1. And at that point it's "just another GPS", and you can have fun with whatever userland utilities you like to configure and/or just gobble GNSS sentences (binary or NMEA, take your pick, U-Blox 7 supports both options.) Observed self-ID sentences immediately after power-up: $GPTXT,01,01,02,ANTSTATUS=OK*3B $GPTXT,01,01,02,u-blox ag - www.u-blox.com*50 $GPTXT,01,01,02,HW UBX-G70xx 00070000 FF7FFFFFo*69 $GPTXT,01,01,02,ROM CORE 1.00 (59842) Jun 27 2012 17:43:52*59 $GPTXT,01,01,02,PROTVER 14.00*1E $GPTXT,01,01,02,ANTSUPERV=AC SD PDoS SR*20 The very bottom line on the label of the units I received is 2311, probably a date code (i.e. November 2023) but not sure that's right. Not confirmed. Both the units I received obtained cold-start 2D fix in about 2 minutes, 3D fix about a minute later, indoors, above grade, with the supplied ceramic antennas. In steady-state, usually sees between 15-25 sats, uses 6 or 7. CEP is surprisingly large even with 6-7 sats, usually around 25m. Can't explain that. The actual reported location is within about 3m most of the time. For $9 each, what's not to like? Five stars. Read more

Todo bien Read more

I like the size and format of the receivers, but the performance is inconsistent between the two units I received. One works reliably, while under the same conditions, the second unit only establishes its position occasionally, if at all. Read more