Specs for Knut

  • Dimensions: 2.5” x 1.6” x 1” (6.5cm x 4cm x 2.7cm)
  • Batteries: 2 AAA
  • Maximum temperature range: -15 °C to +40 °C
  • Waterproof: No
  • Network connectivity: Wi-Fi B/G/N
  • Wi-Fi Encryption: WPA, WPA2, WEP (At this time Knut is not compatible with WPA Enterprise networks)
  • Safe for use in: Sheltered or indoor environments
  • Not safe for use with: water, solvents, harsh chemicals, high heat

Considerations when using Knut

Knut is optimized to function with minimal power consumption. Recording measurements from external sensors consumes minimal energy. The majority of power consumption comes from connecting to the internet. You can extend the lifespan of Knut’s batteries with the following options:

  • Set the number of data transmissions per day to the lowest number that still meets your needs. Data will be visible in the Knut Apps only after data transmissions. However, alert conditions will trigger an alert email as well as a data transmission. This way you’ll be sure to hear from Knut when conditions go awry, even if your Knut regularly sends data only once per week.
  • Keep Knut near a strong Wi-Fi signal. Once Knut has been running, you can see how easily Knut has been connecting to the internet by viewing the Log in the Knut App. The Log lists the “On Seconds”: this is a measure of how long Knut was powered up to transmit data. This number should be 10 seconds or lower, for optimal battery life. If On Seconds are greater than 10, try repositioning Knut or your Wi-Fi router slightly.
  • Set threshold and alert values that really matter to you. That way Knut will only send alert emails for conditions that you want to hear about.

For Hackers and Modders

Out of the box Knut is compatible with:

  • 1-Wire (DS18B20) temperature sensors
  • SHT-20/SHT-21 humidity sensor
  • LIS3DH accelerometer
  • TC75 Temperature sensors
  • Open/closed contact sensors
  • Standard digital or analog inputs

For more complex sensing or control, we recommend using the Knut sensor/actuator control protocol based on i2c. Please contact us for code examples.