I've read post that it's possible to connect multiple Ultra-Sonic Sensors to one Arduino. But I have a few questions:
If I use Arduino Uno, what is the maximum number of Ultra Sonic Sensors that I can connect one Arduino UNO?
Is there any option to power Arduino UNO in some kind of low-power mode so I can achieve power autonomy for at least 90 days.(I'm referring to battey life, or solar powered solutions)
Can Arduino UNO work on the low/high temperatures (e.g. -20 / +50 Celsius degrees), and what is the known work temperature range?
How to secure jumpers/cables to work on extreme temperatures (e.g. -20 / +50 Celsius degrees)
Thanks in advance :D