Mercku M2A Node

Overview
"R06-REV4" and "2018-05-21" are silkscreened on the board in the FCC photos.

Mercku claims that this device has "1Gb" of flash. This seems unlikely and is probably a copy/paste error from the Mercku M2. The ID of the flash chip is not legible in the FCC internal photos but it is probably 8 or 16 GiB.