ericgibbs said:
hi,
What range of:
Temperature, Humidity, Windspeeds and Chill factor are you required to measure and to what resolution.?
These limits will effect the program maths and the displayed data.
Temperature - LM335 not LM35-this was going to be 5 volts but it is going to be a analog frequency
Humidity - HS1101 - up to 5 volts
WindSpeed Sensor, has a whole circuit that will give an 8 bit number from 0 to 255 mph
I don't know if there is anything else you guys need to know.
hi E27,
The LM335 is an analog voltage output 10mV/K, its a Kelvin version of the LM35.?
I'll look thru the HS1101 humidity sensor.
I expect the Windspeed sensor outputs a continous, asychronous 8bit binary code.
Did you see the notes regarding the program that I posted.?
One point you will have to decide, is the refresh rate for displayed data.
eg;
Most weather station data has a slow rate of change, so some form of data averaging should be considered, prior to any display update.
On the temperature data, what resolution do you want to display, will 1Cdeg resolution be OK .???
Likewise for humidity , will 1% be OK.
Sorry to ask so many questions, but what you are asking has a number of solutions.
Regards
EDIT: the HS1101 is a capacitive sensor, it requires a C to F convertor, [as shown in the datasheet], it cannot be connected to PORTA as an analog signal.