Hot Water Tracker
![20190717_092734.jpg](/proxy/?url=https://content.instructables.com/F0Y/DWNL/JY8YNYSI/F0YDWNLJY8YNYSI.jpg&filename=20190717_092734.jpg)
Obtain the supplies below.
Supplies
Supplies Needed:
- Arduino MKR WiFi 1010 (or something of the sort)
- 3 male to female wires
- DHT11 sensor
- NodeRed
- Serial port nodes
- Dashboard nodes
Upload Code to Arduino
![Screenshot_2.png](/proxy/?url=https://content.instructables.com/FWA/CUZJ/JY8YNZZU/FWACUZJJY8YNZZU.png&filename=Screenshot_2.png)
Type in the above code and upload it to your Arduino.
Set Up the Flow
![Screenshot_3.png](/proxy/?url=https://content.instructables.com/FVW/EKS3/JY8YO0XX/FVWEKS3JY8YO0XX.png&filename=Screenshot_3.png)
Layout the following nodes:
Serial input > function > gauge.
The debug nodes are for troubleshooting.
Set Up Function
![Screenshot_4.png](/proxy/?url=https://content.instructables.com/F2C/V5SM/JY8YO11B/F2CV5SMJY8YO11B.png&filename=Screenshot_4.png)
Type in the above code to the function in your flow.
Finish
![Screenshot_1.png](/proxy/?url=https://content.instructables.com/FDV/GYTV/JY8YNYP2/FDVGYTVJY8YNYP2.png&filename=Screenshot_1.png)
If you did all of this, you should see a gauge that displays the amount of hot water left in your hot water tank in percent form.