From afee9fd8f7ed8507f009abecf4986d0d92fbb454 Mon Sep 17 00:00:00 2001 From: "Eric S. Raymond" Date: Wed, 21 May 2014 06:50:05 -0400 Subject: Add a to-do item. --- TODO | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'TODO') diff --git a/TODO b/TODO index 504acbbb..1c4b03bf 100644 --- a/TODO +++ b/TODO @@ -101,6 +101,22 @@ We caw now *really* measure latency from GPS top of second when it has 1PPS. Add this capability to gpsprof and revise the "Where's the Latency?" white paper. +*** Low-pwer autoconfiguration in the uBlox driver *** + +Anthony Stirk writes on Wed May 21 06:09:00 2014: + + The low power modes are really good on the ublox modules (especially the + MAX7's) however a word of warning. + + We use the 1 sec cyclic mode on our balloon trackers but if the module + looses satellites or is jammed out (cheap Chinese cameras do it) the ublox + modules seem to hang and become unresponsive. To mitigate against this you + need to put the module back in max performance mode as soon as the + satellites drops below 4. + +A possibility: drop the chip to low-power modewhen it can see > 4 +sats, revert to normal otherwise. + *** Dispatcher/network issues **** Reading AISHub data via UDP confuses xgps with short writes -- cgit v1.2.1