I am using the APM1 built-in voltage sensors and try to calibrate it.
APM Planner 1.1.84 does not allow me to enter any value.
I set Monitor= 3: Battery Voltage, Capacity=3000
And then I try
1. APM Input Voltage =4.96 (thats what I measure)
2. Measured Battery Voltage= 11.23 (thats what I measure at my battery)
It says: Invalid number entered...
what am I doing wrong ?
Tried the same now on two PCs - Vista and WinXT- always the same effect. Mission planner does not accept any values in the Battery Input tab.
No idea what to do...
the planner looks at the values in
and the current divider to calc the new divider.
make sure all these fields have normal values.
Thnx for your reply.
1. I am not really sure, which fields you are talking about, because the fields that I have, do not match with your description.
2. What I do is as follows
Step one: I enter the Batt Monitor tab and I see the following input table:
I try to input the measured APM Input voltage (field 1)
When selecting the next field, I see the following:
Step 3: Something is wrong, but now I try to input the measured battery voltage. Of course, I click on ok in the "Not available" window first and then I type in my 11.23 Value in Field #2.
When I leave the Battery Monitor Tab and come back, no values have been stored.
What do I have to do different ? Thnx for your help.
I've had problems with that page too. I think you need to enter a non-blank value in the Voltage Divider field, even though it's supposed to be an output, calculated field. Then it only seems to recalculate when I go out of the page and come back in.
On a slightly broader note, why is the APM Input Voltage even needed? If I just enter the Measured Battery Voltage, the program can read the A/D input and work out the overall scaling factor. There should also be no need for Battery voltage (Calced) because that should always equal the Measured value.
As a final comment, the instructions displayed on the page are not complete / correct.
I'm not sure how this feature works. The ESC/BEC provides a regulated 5v output right? So even when the batter voltage drops the apm should still be getting 5v right?
what firmware are you using?
I'm currently running 2.5.4 but was the same for the previous release.
1. I am using ArduPlane V2.33
2. I tried to enter a non-blank value in the Voltage Divider Field. It seems, that a calculation is run (I will document that when I am back to my desk tonight), but
nothing changes in the flight data window in terms of displaying the batt voltage - or do I expect something wrong here ?
I would expect, that the current Batt Voltage ist displayed int the flight data window aftre the calibration process..
Sorry mistake: I use Arduplane 2.24
I did some additional tests and its getting impossible for me to understand whats happening.
I do the same 3 steps as described above.
In addition I enter a value in field 4 = Voltage divider (calced)
Step 4: Enter 1.0 (no idea why 1.0 but just to test) in field 4
If I user <enter> nothing happens, cursors still stays on field 4
a) If I use the mouse to go to field 1 and click left, the "not available" window pops up. I quit this window with OK
b) I goto field 2 , click left, same as above "not available" pops up.
Quit with ok.
c) Go to field 4, click left - a new value is calculated in field 4.
If I go again up to a) and repeat the steps a) b) and c) a new value in field 4 is calculated each time - and this value in field 4 is always growing by some factor (approx. 3.2??) each time I do the loop steps a, b and c.
KnutL, your arduplane version is to old. latest is 2.34
ok, switched to 2.34. With that version I can get MegaPlanner in a status, that it seems to display the correct battery values..thnx.
Usage is still a little tricky - will not touch that aerea again if I dont need to :)
Thank you for your help.