I'm very new to Arduino. Discovering this fascinating world because the float switch in my rainwater tank gave up, causing my pump not to switch to tap water anymore when the tank is empty. A colleague of mine told me that he uses an ultrasonic sensor combined with a PLC to do this task. Been looking in to this for a while, but those industrial sensors and PLC's are quite expensive. He then told me that it could also be done with an Arduino...
So I started my little project by collecting the necessary components:
- Arduino uno
- 4x20 display (I want have a visualisation of the water level and which source is used)
- jsn-sr04t waterproof ultrasonic sensor
- relayboard (with optocoupler) to control the pump
- motion sensor (to regulate backlight of the LCD)
- screw shields because I rather like to screw wires then solder them
I started reading about how to connect and program everything together.
A lot of investigation, trial & error, watching Youtube tutorials later the entire setup now works as I intended.
Now I'm at the stage of starting to build in all the components and unfortunately I started doubting about the JSN-SR04T sensor because of it's 20cm blind zone.
After some investigation I found the A02YYUW (or SEN0311) Waterproof Ultrasonic Sensor...
Looks very similar to the HC-SR04 sensor, with only 3cm blind zone, but waterproof.
However, other than the example code on the website of the fabricant, I can't find much information about this sensor, not even on this forum.
So why should I choose for one or the other (outer than the difference in the blind zone)?