energous EVK Battery Free Wirelessly Powered Sensor User Guide
- June 4, 2024
- energous
Table of Contents
EVK Battery Free Wirelessly Powered Sensor
User Guide
This guide will help you to set up and operate your EVK, demonstrating the capabilities of this battery-free wirelessly powered sensor.
Figure 1: System Diagram
Box Contents
- 1W WattUp PowerBridge Transmitter (1)
- Battery-Free IoT Sensors (2)
- 5V/1A USB power adapter and USB-A to -C cable
Figure 2: EVK Box and Contents
Setup the Powerbridge
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Connect the USB cable to the PowerBridge Transmitter and the power supply.
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Mount the PowerBridge on a stand, a wall, or a ceiling using keyhole screw mounts in a position pointing toward the sensors.
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Plug in the PowerBridge power supply.
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After power-on, the Blue LED fl ashes for the 30s to indicate that the PowerBridge is running.
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The PowerBridge starts RF power transmission automatically, with the white LED indicating that the PowerBridge is now transmitting.
Position the Sensors
- Position the sensors within ~1.5m of the PowerBridge.
- The battery-free sensors are now receiving wireless power from the PowerBridge.
- Once the sensors receive suffi cient power, they will begin taking sensor measurements (Temperature, Humidity, and 3D Accelerometer data), and sending via BLE advertisements.
Reading the Sensor Data
- Download the Atmosic DevTools App from the Android or Apple Store.
Figure 5: Google Play QR code for Atmosic DevTools App
Figure 6: Apple Store QR code for Atmosic DevTools App
Using the Atmosic DevTools App
Open the App, and tap the Applications button:
Tap the Beacon button to start scanning for beacons:
The sensor beacons will appear with the name “Atmosic BCN” followed by a
serial number used to distinguish the beacons. Tap the Monitor button to start
displaying the sensor data:
The sensor data displayed includes the Received Signal Strength from the
sensor (RSSI), Temperature, Humidity, and accelerometer data:
Typical Sensor Range
-
Time to initial sensor data measurement:
The sensors store energy on an internal capacitor.
Without energy from an RF source, the capacitors will discharge over the course of 8 to 10 minutes. -
Once discharged, it will take approximately 4 to 6 minutes at a distance of 1.5 meters to recharge the capacitor and enable sensor transmissions.
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Sensor Placement:
The Sensor can be placed horizontally or vertically.
Figure 11: Sensors Receiver, Vertical,
and Horizontal
The Sensor will receive power in an area of approximately +/30 degrees from
foresight to the PowerBridge Transmitter.
There will be some small amount of performance delta depending on the rotation
of the Sensor relative to boresight from the PowerBridge Transmitter.
FCC Regulatory Information
FCC ID: 2ADNG-VN25 Model: VN25
This device complies with Part 15 of the FCC Rules. Operation is subject to
the following two conditions:
(1) This device may not cause harmful interference, and (2) This device must
accept any interference received, including interference that may cause
undesired operation.
Note: This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:
- Reorient or relocate the equipment being interfered with.
- Increase the separation between the charger and the equipment subject to interference.
- Connect the equipment to an outlet on a circuit different from that to which the charger is connected.
- Consult the dealer or an experienced radio/TV/electronics technician for help.
CAUTION: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
VN25 RF wireless charger complies with FCC RF radiation exposure limits for an
uncontrolled environment in accordance with FCC Rule Part 2.1093. The Wireless
charger transmitter is designed to be installed on the ceiling or on a side
wall and must be installed accordingly to ensure a minimum 20cm separation
distance from persons.
IC: 23686-VN25, Model: VN25
This device complies with Industry Canada’s license-exempt RSSs.
Operation is subject to the following two conditions:
- This device may not cause interference; and
- This device must accept any interference, including interference that may cause undesired operation of the device.
Contact:
sales@energous.com
T:408-963-0200