This is my first project using an Arduino.
The first thing I did was to create a set of code to take four temperature readings and display them on the serial monitor. This uses a function that creates a temperature from a pin number.
Code - See attachment Circuit_07d.txt
This works although I get slight (2nd dp) differences in readings.
I then took the sample Adafruit code for the SD logging card and modified it to log the four temperatures.
Code - See attachment _2014_10_24_4_channel_temerature_logger_v0_3.txt
I have exactly the same circuit in both cases and the same function but with the logging code I only get a room temperature of 450C for all four sensors.
Can anyone guide me towards a solution?
Circuit_07d.txt (3.87 KB)