[uncle_bob]

You are referring to R7?
Can you please post a close photo of this point?

Yes, I'll upload some pics tomorrow, it's time for bed.

So, at the TMP36 pins, we have 5V, GND and connectivity to pin A7. Right?

Yes indeed.

This is from Playground.arduino.cc, it works!

DisablingAutoResetOnSerialConnection

So you have found need for disabling the auto reset? So that the arduino does not reset when establishing a connection. Here are some solutions.

Note: This does NOT apply to the new Arduino Leonardo that uses USB and serial differently. The Leonardo does not auto-reset, however, it is difficult to make Leonardo reset even if desired. See the bottom of this page for Leonardo-specific issues with reset.

The simple way that doesn't require any permanent modifying of your hardware or software configuration changes:

Stick a 120 ohm resistor in the headers between 5v and reset (you can find these on the isp connector too). 120 is hard to find so just combine resistors. Don't go below 110 ohms or above 124 ohms, and don't do this with an isp programmer attached. You can just pull out the resistor when you want auto-reset back.

From that link, tomorrow I'm try the capacitor trick.

Thanks for your replies Werk_AG!
I'll report back with my findings tomorrow after work