Review on HiLetgo Ultrasonic Integrated Transceiver Waterproof by Andy Hearshman

I bought these to use to determine the water level in the tank as these sensors I use (ASIN B07FQCNXPP) have only been around a few months , and I'm on my 3rd of the ones that just failed. Getting 4 of these $8 HiLetgos would be a bargain if they worked better and lasted longer. With no useful usage and connection details from the vendor, I connected one to the JSN board using the ASIN sensor above. Bingo it worked but the working distances advertised are a far cry from what is advertised, less than half of what is advertised. Maybe it's the JSN or Sketchboard I'm using (provided on ASIN webpage B07FQCNXPP), but until HiLetgo provides some alternative hardware and software options to use them, that's all I have to use. So the minimum distance is around 30mm and the maximum is around 1500mm (1.5m), nothing comes close to the advertised 3.5m. So if you want to use them for a reversing sensor they will come up, but anything over 1500mm are they are everywhere. Below is the actual cut and paste of the Arduino exit sensor pointing to the aluminum plate at 1.5m = 156cm <<- actual tape measure = 157cm and close enough for my needs. = 417 cmdistance = 157 cmThey will not work on softer surfaces. I've tried a plastic trash can and painted drywall and have not received a refund. Aimed at metal or water they seem to reflect and detect well when used in the 0.3m to 1.4m range. To sum up if they are REALLY capable of going to 0.3m to 3.5 m to work, then HiLetgo has to provide more information on how to do it. I'm a big fan of HiLetgo products, but this one isn't one of them. Hopefully the supplier can sort this out with some work details to get that 3.5M.