Bangle GPS Power management

You are reading a single comment by @HughB and its replies. Click here to read the full conversation.

•

Gordon

PMS seems a bit redundant when it sounds like you have to fill in PM2 as well

I know! It seems really odd.

One of the power management PDFs shows a chart saying you can get 2ms when using a 10s interval period - the holy grail I guess.

Wow, that'd be great! I've seen a bunch of screenshots from their config app - I wonder whether it could be used to find the correct sequence of bytes to send?

•

HughB in reply to @Gordon

Any chance you could try my UBX-CFG-PM2() I got most of the code from the link in the comments and adjusted the timings I wanted.

I got the bytes from the code at:
https://github.com/thasti/utrak/blob/master/gps.c

  /*
   *  NOT TRIED, NOT TESTED YET
   * https://github.com/thasti/utrak/blob/master/gps.c
   */
  function UBX_CFG_PM2() {
    writeGPScmd([0x06, 0x3B,                    /* class id */
	         44, 0,	                        /* length */
		 0x01, 0x00, 0x00, 0x00, 	/* v1, reserved 1..3 */
		 0x00, 0x10, 0x00, 0x00,        /* on/off-mode, update ephemeris */
		 // little endian, lsb first
		 0x30, 0x75, 0x00, 0x00,	/* update period, ms, 120s=00 01 D4 C0, 30s= 00 00 75 30 */
		 0x20, 0x4E, 0x00, 0x00,	/* search period, ms, 120s, 20s = 00 00 4E 20 */
		 0x00, 0x00, 0x00, 0x00,	/* grid offset */
		 0x00, 0x00,	         	/* on-time after first fix */
		 0x01, 0x00,        		/* minimum acquisition time */
		 0x00, 0x00, 0x00, 0x00,	/* reserved 4,5 */
		 0x00, 0x00, 0x00, 0x00,	/* reserved 6 */
		 0x00, 0x00, 0x00, 0x00,	/* reserved 7 */
		 0x00, 0x00, 0x00, 0x00,	/* reserved 8,9,10 */
	         0x00, 0x00, 0x00, 0x00]);	/* reserved 11 */
  };

Bangle GPS Power management

About

Espruino