top of page

DIY WATERPROOF SmartThings Contact Sensor - Outdoor Z-wave & Zigbee Door Smarthome Automation

After searching for an affordable outdoor, waterproof contact sensor compatible with my SmartThings hub, I came up empty-handed. So I decided to DIY my own. Watch the video above for all the details on how to make your own. It's easy!

Required Components

Zigbee or Zwave Contact Sensor

Small Waterproof Enclosure Box

The sensor was put into this waterproof box (LINK). I bought the 2 pack of boxes because I plan to use the other also. If you only need one box, it's a bit cheaper to buy just one (LINK).

Are There Really Any Waterproof Outdoor Sensor Options?

In the video, I say that I found a $100 sensor solution (Honeywell 5816OD Outdoor Wireless Magnetic Contact), but upon closer investigation, this is not a Z-Wave or Zigbee sensor that is smart home compatible. It is a wireless sensor compatible with Honeywell security systems. Do not buy this. It will not work with your SmartThings or other smart home systems.

Why Do I Need A Waterproof Outdoor Smarthome Sensor?

The reason that I needed this waterproof Smartthings compatible sensor was to use outside on a package Dropbox. this way I know when UPS, FedEx, UPS or a client drops off a package. I can then check the Ring doorbell camera to see who it was.

UPGRADE TO Rechargeable 2450 Coin Cell Battery

What I've discovered using it is that the battery depletes faster when used outdoors due to more rapid temperature changes which cause it to report the temperature more often and consume the battery faster. Also, the battery depletes faster in winter when it is cold. After the initial battery died in about 6 months, I replaced it with a rechargeable battery that lasts about 4 months. I need to change it more often, but don't need to throw it away each time.

The stock battery in the SmartThings Multipurpose sensor is a 3V CR2450 battery, which has a capacity of 600-620


There does exist a 3V lithium coin rechargeable battery known as the ML2430, which is 3mm thick instead of 5mm thick like the CR2450. I have not been able to find an ML2450 3V cell.

The most common 2450 rechargeable battery is the LiR2450 which typically has a voltage of 3.6-3.7V, and a capacity of 100-125 mAh and can be recharged 500-800 times. This size coin cell battery is popular for use in CMOS memory for computer motherboards. When you purchase, please make sure to buy the one without tabs.

Where To Buy LiR2450 Battery



LIR2450 batteries can also be purchased with a charger, like this set I purchased so that I could start using the batteries immediately while I work on the solar charging circuit.

The products shown here were purchased by me with the intent to use them. I did not receive any free items, and I am not being paid or compensated for this review. The video and description may contain affiliate links. If you click on a link, I may receive a commission. Money earned helps to support my channel and bring you more informative videos about engineering, crafting, and DIY.


Recent Posts
Search By Tags
Follow Us
  • Facebook Basic Square
  • Twitter Basic Square
  • Google+ Basic Square
bottom of page