Battery monitor

RV

I am attempting to build a remote battery monitor using a BS2 and Xbee. The program works well for one battery but I would like to monitor two. I have attempted to change the code to read the output on pin 1 in addition to the existing pin 0 but am unable to get it to work properly and would like any suggestions and or code.

The program is as follows:

rct var word ' RCtime value
Vx var word ' voltage value calculated
' we want this to = applied voltage Vx
Cn1 con 48576 ' first constant, see below
Cn2 con 8 ' second constant, ditto
' circuit attached to P0
low 0
loop:
RCtime 0,0,rct
low 0
Vx=Cn1 / rct + Cn2
debug home,dec? rct,"Vx=",dec Vx/10,".",dec1 Vx
pause 500
goto loop


This is from emesystems.com and I did attempt to contact them for suggestions to no avail.

Thank you in advance for any help. I am a rank newbie....

Pete

P.S. The article is at www.emesystems.com/BS2rct.htm

PJAllen

RV wrote: »

The program works well for one battery but I would like to monitor two. I have attempted to change the code to read the output on pin 1 in addition to the existing pin 0 but am unable to get it to work properly and would like any suggestions and or code.

Two batteries? In series or what?

If it's a matter of two different batteries then you need two battery monitor circuits
and this (?) re-hashing of your code using P0 and P1, I think:

' {$STAMP BS2}
' {$PBASIC 2.5}

rct VAR Word ' RCtime value
Vx VAR Word ' voltage value calculated
Cn1 CON 48576 ' first constant, see below
Cn2 CON 8 ' second constant, ditto

low 0
low 1

DO

RCtime 0,0,rct
low 0
Vx=Cn1 / rct + Cn2
DEBUG HOME,DEC? rct,"1 Vx=",DEC Vx/10,".",DEC1 Vx  ' ***
pause 500

RCTIME 1,0,rct
LOW 1
Vx=Cn1 / rct + Cn2
DEBUG HOME,DEC? rct,"2 Vx=",DEC Vx/10,".",DEC1 Vx  '  ***
pause 500

LOOP

That could be made more compact, but I didn't want to complicate.

RV

Thanks PJ
I am still playing with the hardware side and have just about worked it out.

Pete