The memory test boots up a small operating system with the sole purpose of testing the memory. It goes through a few stages of writes and reads. It first writes some data to the memory (RAM) and then reads it back. Matching results indicate properly working RAM.
On the RN102, the LEDs on the front of the unit are used to indicate memory test progress as well as success or failure of the test.
The memory test runs for 4 hours. Refer to the diagram below which indicates the behaviour of the LEDs during the test and how to interpret test success or failure.
Last Updated:07/07/2025
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Article ID: 25629