Yes! We are currently experimenting with Energizer Ultimate Lithium AA batteries, and they look like they are extending the lifetime of Sensor MoJo by at least 33%, possibly more.  
This is an interesting question, the short answer is yes. The Sensor MoJo cloud runs a daily watchdog to ensure all sensors are operating and reporting their data to the cloud. If there is an interruption, you can receive an email if you have enabled this setting on the sensor settings screen. It is not possible to identify exactly why there might be connectivity issues, but the three common reasons are:
  • The WiFi goes down
  • The power goes out
  • The batteries run out
This daily watchdog will notify you when this happens so you can know that there is an issue. Interestingly, when you have an interruption in power or in WiFi, you can use Sensor MoJo to tell when the power or WiFi comes back up - it will automatically report its data. One Sensor MoJo user did just this to tell when the power came back on during the 2018 Alaska earthquake - see this blog post for more information.
Sensor MoJo stores sensor readings in UTC time in its database. But, when you view sensor data, the data is shown in your local time. So, if you have a sensor in a different timezone, you will be seeing the data in your local time, not the local time of the sensor.
Yes, you can share your sensor with other people that you invite, and they will also optionally receive alarms as well. On the sensor setting screen in the app, you can send someone an email invitation to share your sensor.
Yes! You can have as many sensors as you would like. They will all show up on the main screen in the app in a list as you add them.
SensorMoJo’s low power sensing engine samples sensors at one sample per minute, continuously. The SensorMoJo One model samples each of its sensors at this one minute interval:
  • Temperature
  • Humidity
  • Vibration
  • Orientation
This sample rate stays the same regardless of the settings for your SensorMoJo sensor. But, you can set how often your sensor reports its data to the cloud and that affects its battery life.
Example: A game or t-shirt for sale
You can set how often your sensor reports its data to the cloud, and that will change its battery lifetime. Here’s how long it will last on two AA batteries:
Report Rate Battery Life
Every 15 minutes About 3 Months
Every 30 minutes About 6 Months
Every Hour About 1 Year
Every Two Hours Up to Two Years
So, why not just set the report rate to two hours? Well, it depends on how you want to use your sensor. The downside of a slow report rate is that if you go to check the real-time data, you won’t be able to see the last 1-120 minutes, depending on when it last reported. But, if you want to extend your battery life and don’t mind not immediately having the last two hours of data, setting it to every two hours is the way to go. The best part is that even at slow reporting rates, alarms happen on the exact minute the alarm thresholds are exceeded.
Every minute, when the SensorMoJo low power sensing engine samples each of its sensors, it compares the new data to the alarm thresholds. If any limit is out of bounds, SensorMoJo will immediately initiate a report to the cloud so that the alarm is reported at once. It does not matter what the report rate is. Even if you have set the rate to “Every Two Hours”, any time an alarm happens, the report happens immediately, and you will receive the alarm via text or email as you have set it up. Another setting, called “Alarm Rate” controls how often you will get alarms while the alarm condition persists. For example, if you have set the temperature alarm to 80 degrees, and the temperature goes above 80, you will receive a text/email at your alarm rate until the temperature goes below 80 degrees.
Well, yes and no. SensorMoJo isn’t waterproof, so don’t put it outside where it might get wet from rain or snow. But, it can withstand quite cold temperatures, so feel free to put it outside where it won’t get wet, such as on a covered porch. For example, here’s a plot of a SensorMoJo in the trunk of a car over a weekend: That was a very cold weekend in March in Colorado.
If your Sensor MoJo can’t connect to WiFi, it will store its data locally in flash storage, which we call the Data Locker. When it re-connects to Wifi, any data that it has stored will then be uploaded to the cloud. This way, you’ll never lose a minute of data when there is Wifi trouble. But, it enables an entirely different way to use SensorMoJo. You can send your SensorMoJo on a trip, and when it returns, it will take the data out of the Data Locker and upload it to the cloud. There are lots of uses for this. For example
  • Throw it in a Grocery Bag to make sure groceries stay food safe.
  • Monitor valuable assets during shipping.
  • Monitor food during its voyage from production to consumption.

I just joined my sensor to WiFi, where is my data?

The default report rate for data is 15 minutes, so the first report will happen 15 minutes after you join to WiFi.

Learn More

Have a look at more information about SensorMoJo on the product page.