This module is a multifunctional device with features such as weight measurement, 4G CAT1 communication, access control, temperature monitoring, QR code recognition, and barcode recognition.

It is expandable to support features like water flooding detection, smoke detection, humidity monitoring, NFC recognition, RFID recognition, gravity sensing, and more. It can be used in various scenarios such as environmental monitoring, old clothes recycling, plastic waste recycling, supermarket product management, vending machines, warehouse inventory management, and more.

1. Application Scenarios and Workflow:

Scenario 1:

1. The user opens the door, and a voice prompt says, “Please place the clothes inside.”
2. The user places clothes in the V-slot and closes the door (if the door is not detected as closed after 30 seconds, a voice prompt will say, “Please close the door”). The weight changes, and the control board detects the door closure. A voice prompt will say, “If the drop-off is complete, please present the QR code.”
3. Once the QR code is scanned, the drop-off is considered complete.

Scenario 2:

If the door is opened for a drop-off but no QR code is presented, and the door remains open with an increase in weight, the weight will continue to accumulate. A voice prompt will continue saying, “If the drop-off is complete, please present the QR code.”

This process repeats until the QR code is presented, completing the drop-off.

3. Once the data is successfully uploaded, the voice will say, “Ding-dong.”
4. If the user does not present a QR code, after 2 minutes, the weight information is uploaded, and the user ID will be: 00-000000-000000-00000000000. The system will then enter sleep mode.

Scenario 3:

1. The user opens the door, and a voice prompt says, “Please place the clothes inside.”
2. The user opens the door but does not place anything inside and then closes the door (if the door is not closed within 30 seconds, a voice prompt will say, “Please close the door”). The weight does not change.
3. After two minutes, the system enters sleep mode.

Scenario 4:

1. The user opens the door, and a voice prompt says, “Please place the clothes inside.”
2. The user opens the door but does not place anything inside and does not close the door (after 30 seconds of the door being open, a voice prompt will say, “Please close the door”). The door remains open, and the user leaves.
3. After two minutes (from the time the door was opened), the system enters sleep mode.

2. Information Reported to the Server:

1. Heartbeat package: Device ID, device temperature, battery level.
2. Weight report: Device ID, timestamp, user ID, weight.

3. Exception Handling:

When 4G communication is interrupted, the control board will store historical weight records, including the time, weight, and user information (obtained via QR code). Once communication is restored, the information will be sent to the server. The device does not retain the information that has already been reported.

The weight information received by the control board is not in real-time but is recorded based on obtaining the user’s information (via QR code) as a single drop-off record.