Hi all, I'm a developer but a total noob to IoT/electronics, please help! I'm looking to create something I can put on the inside of my water tank to monitor the water levels remotely, a colleague has done this and suggested using a JSN SR04T waterproof transducer, along with a WeMos D1 R2. I not…

If the sensor operator 5 V like you say, then you either need to use a level shifter to shift the 3.3 V up to 5 V, or switch to the Uno.

does anyone have link to 3.3V sensors?

I have just completed such a sensor. I build sensors, some based on Wemos mini and others based on atmega328 + rfm95. My tank level sensor is ATmega328 + rfm95 at 3.3V powered by 3xAAA batteries. No solar or WiFi available where the tank is. I will dig out the link where I purchased the sensor fo…

Here it is . Here is the last 24 hours data from the sensor. You can see where a bath was run at around 4pm yesterday and where I took a shower at 6am this morning. [Capture.PNG] [Capture.PNG]

I use the USB to power the WeMos with 5v and use 5v from the 5V output of the WeMos to power my JSN SR04T then just bring the signal into a pin on the WeMos. Since the waterfproof versions are not usseable when the surface is closer than 9-10 inches, there is some need to distance the unit from th…

dave-in-nj: PaulRB, nice chart ! where/how is that hosted ? It's hosted on a commercial web server, the type you pay an annual fee of a ~£30 for and provides email, web space, database etc. I wanted to learn a little PHP, so I wrote my own scripts for storing & displaying data from a mySQL datab…

Thanks both of you! Initially I bought the JSN SR04T but found it is very unstable and has many problems like minimum distance of 20cm Thousands of others are having a problem with it too as per this video [Don't buy JSN-SR04T-2.0 ultrasonic distance sensor module] Therefore JSN SR04…

total noob, first project waterproof ultrasonic water level detection

Projects General Guidance

wvmarle December 8, 2017, 12:14pm 3

The non-waterproof version of this sensor (HC-SR04) has 3.3V versions available. Fair chance the waterproof version does as well.

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total noob, first project waterproof ultrasonic water level detection

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