This is a placeholder topic for “Grove - Water Level Sensor (10cm) for Arduino” comments.
The Grove Water Level Sensor is a very accurate sensor that can be helpful in water level sensing applications. It is completely waterproof and uses…
Read moreHow best to waterproof the top components so this can be integrated into a submarine’s ballast tank?
Additionally, if there is a way to make this shorter that would be great
Hi James,
There’s a few different means to water proof electronics. There are some aerosol lacquers about that offer great protection from water for electronics. I’ve also seen hot glue and silicon solutions used too.
While there should be nothing stopping you from trimming the end off the board to make it shorter you will damage the coating on the PCB to prevent corrosion. I’m not sure if it will have an impact on performance but assuming not you can subtract however much you cut off the board from your reading to zero it.
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How can I connect this to an Arduino, the example code on the product does not work. I don’t want to use a seperate ‘host board’, I wish to just connect the SCL and SDA to the Arduino.
Hi @J.a.m.e.s,
Would you be able to share some more about how you have this set up?
I would hope that connecting:
- Grove sensor to Arduino
- Ground (1) to GND
- VCC (2) to 5V
- SDA (3) to SDA
- SCL (4) to SCL
The Arduino side of this connection may be different depending on your board. Would you be able to share what specific board model you are using so we can continue troubleshooting from there?
Hope this helps! 
Hi Core and all
Don’t know how this got so long without picking up the fact that the 2 pics in the product overview show connections to be mirror image.
According to the circuit pins 1 & 2 are I2C, pin 3 is VCC and pin 4 Gnd.
This would throw some doubt on all of it.
Just which one is correct.
Cheers Bob
Hi @Robert93820,
Thanks for bringing this to our attention. I have tested this sensor and the wiring shown in my last post above is correct.
It seems like there has been an error when printing these boards as the writing on the bottom side of the board indicates a mirrored, incorrect pinout.
I have raised this issue with the manufacturer but in the mean time the pinout I have described above should be correct and connecting a standard grove cable to this module will ensure the correct connections.
Hi Samuel
This is in 2 posts. I have replied in the other one and for completeness copy here.
This means that the schematic is also incorrect. That IS a bad blunder. I for one would believe the schematic and the other image. Just for the reason that if 2 out of 3 are the same the odds are that this would be correct and the other one wrong.
In this case it would seem that the 2 out of 3 are incorrect and the odd one out is OK. I find it a bit hard to comprehend that such an error could occur in 2 fairly unrelated cases. By unrelated I mean that one is a schematic presumably drawn by the design people and one is a photo (I think).
Cheers Bob
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Hi @Robert93820
So that the information is on both posts, the pins being reversed on the rear of the is intentional and not an error with the board, the pads on the rear of the board appear to be related to the programming of the board as they are labelled UPDI (Unified Program and Debug Interface) 1 and 2 and are hooked onto pin 19 of both the onboard ATTINY1616 boards,
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Hi Dan
Now I am confused. You say the screen print is intentional.
Take for instance the Ground connection. The schematic and back of board says pin 4. The Pic says pin 1 which you say is correct.
As I am not likely to purchase and use one of these I will gracefully bow out and leave it to others to sort. Too confusing for this feeble brain.
Cheers Bob
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