pico-tracker/_posts/0002-01-01-gps.markdown

title	tagline	linkname	x	y
Global Positioning System	ublox MAX-M8C	gps	18%	60%

The MAX-M8C module is used for positioning. The -M8C variant has a 1.65V - 3.6V supply but doesn't include a RTC crystal. The ARM Cortex communicates over 9600 baud UART using the UBX protocol.

The module is set in flight mode (Platform Model = AIRBOURNE 1G). Whilst the module is capable of receiving two GNSS contellations at once it is set to only receive GPS. This allows the receiver to be set in power save mode (lpMode = 1 in the CFG RXM message). TODO: Update this after experiments with advanced powersave modes

HAB Supplies is a great supplier for this module.

TODO: Photo