Aev Spol WSBRS001 Wireless Seat Belt Reminder User Manual
- June 5, 2024
- Aev Spol
Table of Contents
Manual 2K7959760A
User Manual
Frequencies
Bluetooth Low Energy f=2402MHz ÷ 2480MHz
Function description
Image1 S-SG
The S-SG in the car seat is powered by a built-in battery. The mechanical construction enables the exchange of the battery without special tools or soldering. The S-SG sends the status information of the belt buckles and the status of seat occupancy sensors. The information is sent either at the time when a change is detected or every 25 seconds cyclically. The reading period of the AD value of the resistance circuit in the seat occupancy sensor is 200 ms, it can be changed by software. The battery voltage is read once a day. The algorithm for the evaluation of the battery status then sends the current value in every Bluetooth message. The S-SG is contacted only at the time of data transmission with the F-SG, otherwise, it is in the (low power mode) power-saving mode.
Error conditions
The device can not detect the faulty state of the belt buckle, the analog value is not measured at the entrance, and there is only detected a logic signal. The device detects error state values at the inputs to determine seat occupancy. The following error conditions are detected:
Table1 Limit values of the sitting sensor
| error signal | value | tolerance | description |
|---|---|---|---|
| delivery status | After switching on the device, the value is not read (not |
used in practice)
Low resistance value| R <60 Ω| 60 ± 4 Ω| The wires are connected or shorted to
GND
Seat occupied| 60 Ω <= R <= 250 Ω| 60 ± 4 Ω
250 ± 8 Ω| The correct value is expected
Average resistance value| Is not used| | unexpected invalid resistance
Vacant seat| 250 Ω <R <= 620 Ω| 250 ± 8 Ω
620 ± 15 Ω| Expected valid value
High resistance value| R> 620 Ω| 620 ± 15 Ω| Wires broke or high resistance
Image2 Error detection algorithm on the input of the occupied seat
Temperature or voltage operating range
| temperature: | -40ºC ÷ +80ºC |
|---|---|
| voltage: | battery 3,3V; CR2477 |
The manufacturer of this radio equipment declares that the device comply
with the
ISED regulation:
IC: 25953-WSBRS001
NOTICE:
This device complies with Part 15 of the FCC Rules [and contains license-
exempt transmitter(s)/receiver(s) that comply with Innovation, Science, and
Economic Development
Canada’s licence-exempt RSS standard(s)].
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.
NOTICE:
Changes or modifications made to this equipment not expressly approved by
(manufacturer name) may void the FCC authorization to operate this equipment.
Date: 07/23/2020
version 0.2
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