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Description: The GP-635T is a slim GPS receiver with -161dBm tracking sensitivity and only 27 second cold start time. The slim design makes it ideal for applications where you don’t have a lot of space to work in. Really it’s quite small. This 50-channel GPS module, based on the uBlox-6 chipset, has an operating voltage of 3.3~5.5V, an antenna on board, and connects to your system via TTL serial. The 1Hz update rate is fast enough for the majority of applications (and can be increased to 5Hz if you need) so whether you’re tracking a pet or building an autonomous car, the GP-635T has you covered!
Not sure which GPS module is right for you? Check out our GPS Buying Guide!
Note: We are carrying the “T” option of this module which is TTL-UART and not USB.
Note: This receiver works with 6-pin 1mm pitch JST type cables and connectors which you can find in the related items below!
Dimensions: 35 x 8 x 6.5 mm
Based on 6 ratings:
1 of 3 found this helpful:
NVRAM is volatile. Loses all settings at poweroff.
Time to first fix is a little slow.
Shutdown pin doesn’t share the same voltage range as VCC, so you can’t do something simple like tie it to VCC with a resistor to ground. Makes using VBAT way more complicated than it should be.
JST-SH is mildly annoying.
I am building a GPS clock with time and date. Parsing the data out of the $GPRMC sentence. Interfacing it with a Picaxe 20x2 @ 64mhz. Using adafruit 7 segment i2c as displays. I have completed 90 % of software. Getting go result so far. Also using the UBLOX software a tool.
We have used these receivers for several years and find them to be very reliable and always operate better than the specs advertised.Good job Sparkfun.
The GPS unit is excellent, but remember to order the connector at the same time - no workaround in that respect! Excellent support via the uCentre UBlox windows application. Interfacing to uM-FPU64 for astronomical calculations.
I needed a small gps to operate without elaborate mounting (no ground plane, for instance) and it had to work in a vertical position, while rotating. My first trial was attached to an X-Bee regulated explorer and propped up in a ground floor window. I got a 10 sat fix with several sats behind the device and through two levels of building. Even the X-Bee-pro 900 xsc worked with the new explorer. I fed the GPS with 3.3v off the explorer and with 5V direct. It worked either way. Now, if we could just get a tutorial on processing NEMA strings!
This is the first and only GPS receiver I have ever worked with, but it was easy enough to get working. The warm-up time seems to be a bit long - sometimes it takes over 5 minutes to achieve a satellite lock, especially when operating indoors on a window ledge. This unit also seems very prone to signal degradation when not pointed the right way (up at the sky). Hard to beat the price though!