Sleep mode/Power save mode of zed-F9p and some other queries

GPS/GNSS Development Boards
1

I have purchased two zed-F9p modules from Sparkfun. I am able to achieve a location FIX in both the modules using RTCM data from a nearby correction source (thanks to the great, well written, and well documented Sparkfun library). I have the following queries:

a) How can I put the zed-F9p module to sleep and wake it up as per my need. It consumes a lot of power and I need to operate it using a battery.

b) How accuracte is the value obtained from HorizontalAccuracy command.

c) Once I get a Fix (getcarriersolutiontype (RTK) == 2) can I be sure that I am achieving sub cm level accuracy

Thank you.

2

Hi @bodhibrata,

a) https://github.com/sparkfun/SparkFun_u- … werOff.ino

b) The horizontal accuracy is an estimate based on the positions of the satellites used for the fix. It is approximate, not absolute.

c) You should see the horizontal accuracy estimate (hAcc) drop to 10-20mm once you have a Fixed carrier solution. The accuracy is worse while you have a Floating solution.

Best wishes,

Paul

3

Thanks a lot, @PaulZC for the prompt reply.

4

Hi PaulZc… I have tried using the code [https://github.com/sparkfun/SparkFun_u- … werOff.ino] …

However, the sleep current is 79mA, measured using PPK II (after disconnecting the LEDs in the board). What is the expected sleep current?

PaulZC:
Hi @bodhibrata,

a) https://github.com/sparkfun/SparkFun_u- … werOff.ino

b) The horizontal accuracy is an estimate based on the positions of the satellites used for the fix. It is approximate, not absolute.

c) You should see the horizontal accuracy estimate (hAcc) drop to 10-20mm once you have a Fixed carrier solution. The accuracy is worse while you have a Floating solution.

Best wishes,

Paul

5

Hi,

I am sorry. I do not know. I can not find a value for it in the datasheet or the integration manual.

Best wishes,

Paul