User's Manual

Application Note [Page 18]
Design Considerations of EMW3239
5. Mass Production Test and Product Update
Customers should consider not only the function of product but also the testing method in mass production
and update firmware on the product.
Module Test 5.1
In order to avoid inferior module and make sure the correct of downloading firmware, MXCHIP strongly
suggests product testing before produce. Fully test is required after producing.
5.1.1 Half Secondary Development of Firmware
Module connects the MCU from customer through serial port. In secondary development, test command
could be added into firmware. For example, module could scan hotpot around itself and return the results from
serial port by sending testing command through serial port.
5.1.2 Complete Secondary Development of Firmware
Application of customer is based on secondary development of module.
Testing method is variable in complete secondary development mode. Test mode could be set to detect the
performance of the module. The default set up could be used as router for testing. Router is connected when the
module powers on. Details about the test are decided by the application of customers.
Product Update 5.2
OTA is suggested in upgrading the product. OTA is a method to update by wireless.
If the product has bug or inferior, OTA is a better way to update the product.
Send the latest firmware to Cloud. Module would download the firmware into itself when connects to internet.
Latest firmware would be updated after restart automatically.