Which Hardware for new project

Using Arduino Project Guidance
#1

Hi,

Need some help which hardware to use.

I need to exite two sensors with 2.5 Volt, delay for 10 MS measure and send the data via and SMS to server every 6 hours. Also need to go into a sleep mode between measurements to save battery life and measure a flowmeter pulses (switch closures) in die sleepmode.

The sleepmode must use less than 0.1 mA of power.

All help will be appreciated.

Thanks
James

#2

Any Arduino should be able to do the measuring and sending. But you need to post a link to the datasheet for the sensors.

The smaller boards with the fewest components would probably use the least amount of power when sleeping.

...R

#3

The flowmeter output is a switch closure from a plastic kent flowmeter and the two other sensor specs is:

MEASUREMENT TIME
10 ms (milliseconds)
OUTPUT 300 - 1250 mV, independent of excitation voltage
OPERATING ENVIRONMENT
POWER REQUIREMENTS 3 VDC @ 12 mA to 15 VDC @ 15 mA

Thanks
James

#4

You did not post a link to the datasheet so I don't know what "measurement time" means. But it looks like yhe Arduino just needs to read the voltage which should not be a problem.

I had missed the point about counting pulses while asleep. I think you can arrange for the pulse to wake up the Atmega 328 from sleep. Do you know the width (in microsecs) of a pulse ?

...R

#5