How Does It Work?
1. Initial Setup (One-Time Configuration)
When the sensor is registered for the first time, it receives from the server a list of authorized WiFi networks. These networks are configured by the system administrator through the web platform.
Example:
If a company has WiFi networks in Areas A, B, and C, all of them can be registered. The sensor will automatically connect to any of these networks when available.
2. Automatic Connection Process
Whenever the sensor needs to send data to the server, it performs the following steps:
STEP 1: Turn on WiFi
The sensor automatically enables WiFi.
STEP 2: Scan for available networks
The sensor scans for WiFi networks within range.
STEP 3: Identify authorized networks
It compares detected networks with the authorized network list received from the server.
STEP 4: Select the best network
If more than one authorized network is available, the device automatically selects the one with the strongest signal (best quality).
STEP 5: Connect and send data
The device connects to the selected network, sends monitoring data, and then turns WiFi off to preserve battery life.
3. Intelligent Network Selection
When the worker moves between different areas of the facility, the device automatically:
Detects which authorized WiFi network is available
Evaluates signal strength
Connects to the network with the strongest signal
Practical example:
Location | Available Networks | Selected Network |
Office | WiFi_Office (-40 dBm), WiFi_Cafeteria (-80 dBm) | WiFi_Office (stronger) |
Cafeteria | WiFi_Cafeteria (-35 dBm) | WiFi_Cafeteria (only one) |
Outdoor Area | No authorized networks | Data stored for later sync |
4. Battery Optimization
The system is designed to maximize battery life:
Action | Benefit |
WiFi remains off most of the time | Reduces energy consumption |
Turns on only when data transmission is required | Avoids unnecessary power use |
Fast connection (reuses saved configurations) | Minimizes active WiFi time |
Turns off immediately after transmission | Returns to power-saving mode |
5. Data Synchronization
Normal Synchronization
Occurs every 10 minutes
Sends sensor readings (heart rate, movement, location)
Takes only a few seconds
Emergency Synchronization
Triggered immediately when an incident is detected
Maximum transmission priority
Ensures real-time alert delivery
6. Offline Operation
If the device cannot connect to any authorized WiFi network:
Data is securely stored in the device’s internal memory
No data loss occurs
Automatic transmission happens once WiFi becomes available
7. Simplified Technical Specifications
Item | Specification |
Device | iSafe SW1.1 |
RAM Memory | 1 GB |
WiFi Type | 2.4 GHz (compatible with most networks) |
Security | WPA2 (modern security standard) |
Average Connection Time | 2–5 seconds |
8. Frequently Asked Questions
Does the worker need to do anything?
No. After the initial device registration and shift start, the entire process is automatic.
What happens if the worker leaves the WiFi coverage area?
Data is stored locally on the device and automatically transmitted when WiFi coverage is restored.
Can new WiFi networks be added?
Yes. The system administrator can register new networks through the web platform. The device will automatically receive the update.
Does WiFi consume a lot of battery?
No. The system is optimized to keep WiFi turned off most of the time, activating it only for a few seconds when necessary.