Production Test on Wi-Fi Energy Monitoring Socket

This topic describes production tests on the finished products of no-code and all-in-one OEM Wi-Fi energy monitoring sockets, covering Wi-Fi function, the capability of communication between the module and the control board, and the electricity statistics calibration of the sockets.

Background information

According to the parameter setting of the production test firmware, the tests on the finished products of energy monitoring sockets are classified into the single production test process and dual production test process.

• Single production test process: It only completes the pre-aging production test in the first stage, and the pre-aging production test can be repeated.
• Dual production test process: It includes both the pre-aging production test and the post-aging production test. The pre-aging production test can only be performed once, and it cannot be performed again after it is completed. The post-aging production test can be repeated, but it can only be performed after the pre-aging production test is completed.

Application scope

It applies to Wi-Fi no-code, all-in-one, and OEM solutions whose firmware supports the new production test process. The production test can be repeated.

Indicator of a successful production test

• The Wi-Fi indicator is always on.
• The relay is off.

Things to note

• Place the device under test three to five meters away from the router without any obstacles.

  Note: When using the surrounding aging rack for production testing, make sure that the device under test will not be blocked by metal or surrounded by other products.

• In the production test environment, use as few non-test routers as possible to reduce interference thus speeding up the production test.
• Remove paired devices from the app with the network and wait 10 seconds to power them off before starting the production test.

Preparation

Device preparation

Deployment preparation

• Place a powered-on 2.4 GHz router three to five meters away from the device under test.
• Connect the AC stable isolated power supply to the input live wire LIN and the input neutral wire N of the control board.
• Press down the test jig and check whether the current is normal.
  
• Connect the load to the output live wire LOUT and output neutral wire N of the control board.

  Note: Pay attention to the heat dissipation of the load to prevent burns.

Production test process

Procedure

You can perform the single production test with reference to the pre-aging production test of the dual production test process. This section uses the dual production test process as an example to describe.

Pre-aging test

1. Replace the router SSID with tuya_mdev_test1.
2. Power on the socket under test and check whether the power supply of the relay is normal.
   • 5V relay: The voltage range of the device under test is 4.6V to 6V.
   • 12V relay: The voltage range of the device under test is 11.5V to 13V.
3. Check whether the voltmeter is normal.
   • 5V (optional): The normal range is 4.8V to 5.2V.
   • 3.3V: The normal range is 3V to 3.6V.
4. Check whether the module is in low power mode, and wait for the module to automatically search for the production test router.
   • Low power mode: The Wi-Fi indicator is off, and the relay the indicator will turn on and off synchronously with the relay flips.
   • Searching for the production test router: The Wi-Fi indicator turns off after the production test router is found.
5. Check whether the module enters the battery level calibration status.
   Battery level calibration status: The relay is automatically closed, and the Wi-Fi indicator flickers twice every three seconds.
6. Check whether the battery level calibration is successful.
   Successful battery level calibration:
   • The Wi-Fi indicator is always on.
   • The relay is off.
7. (Optional) Keep power-on for 2 minutes to allow the socket to complete the aging test.

   Note: If you do not want the socket to enter the aging process, power off.

8. Power off the socket.

Post-aging production test

1. Replace the router SSID with tuya_mdev_test2.
2. Perform steps 2 to 6 of the pre-aging production test.
3. Power off the socket.