Micro M8N GPS Module

I have yet to actually use this GPS unit and I will update my review when I do, but I figured it would be helpful to post the pinout I found. Unfortunately there is almost no useful information about this module online and it took forever to find, so here it is:Starting from the RED wire (the rest are black)SCL - SDA - 5V - RX - TX - GND

defective

Works great.. a little on the bigger side, nonetheless it very precise

After 2 hours disconnected, the unit loses its last known location so it has to reacquire from the start. That takes several minutes. Reply from Holybro said the memory is kept by a capacitor, not a battery. It only lasts 1-2 hours. I soldered in a MS620 battery and now it keeps the memory overnight or longer. It also did not have the required 2K ohm pull up resistors for the SCL/SCA data lines. I had to add them for the magnetometer to work with a Omnibus F4 flight controller. I also had to change the freq from 5Hz to 10Hz with the Ublox tool. Not very friendly for using out of the box. It also loses GPS lock intermittently during flight. The plastic case is nice, though.

This GPS module works and i am very surprised. It acquires GPS quickly, and i would use this brand from now on.

I am searching for a nice little Ublox M8N module for my head-mounted electronics project. After discovering that most of the products out here are complete crap, likely counterfeit, I had high hopes for this one. At this super high price point ($50), and given how gorgeous the PCB and assembly is, and given what I thought was the reputable name Holybro, I thought this might finally be the one.Well, out of the box you just have a plastic enclosure with 6 wires coming out of it. One red, 5 black (seriously, nice color coding?!). Worse, no documentation, at all. No silkscreen, no clue what these pins are. I googled and found nothing on the Holybro site, nor any of the stores selling them. Incredible. More googling and I find a Pixhawk controller GPS connector pinout, 6 pins, red on one end, all black, and so I confidently thought that has to be it and built up my cable, hooked up +5/GND/RX/TX to my USB to serial adapter, and fired it up. LEDs flashed, then went out, then it drew about 500mA and I thought this is bad, so quickly disconnected.Back to Google. After trying many different things for 15 minutes, I finally find this: http://www.holybro.com/manual/Micro%20M8N%20Manual_v1.0.pdfNo link to this on the Holybro website that I could find, but Google found it. It matched perfectly, so I proceeded to rip up my beautiful cable and shrink wrap, and carefully connect just the NEW +5 and GND pins to my bench supply with current limiting so I could watch this more carefully. Applying +5V, the current spiked to nearly 1A, then dropped to about 200mA and just stayed there. No more LED activity at all. No smoke ever came out, everything looks great, but it just draws 1W and does nothing. Not even warm! Feeling around to figure out where the 1W was going...ouch!....I found one component doing so, the big black rectangular device with a "4" on it next to the GND wire input was super hot. Perhaps some sort of protection device?Well, great. $50 down the drain, completely unacceptable lack of documentation, which probably led to me frying the darned thing by following a different Pixhawk 6-wire standard. Even more unacceptable if they don't even follow any particular standard, so even people trying to do exactly what this is intended for might fry it.Really really disappointed, please make sure you REALLY know what you are doing before powering this up if you are brave enough to try it.