Placeholder Co is a small, independent practice publishing technical research and analysis. The work here is written to be read closely: each piece sets out the question, the method, the evidence and the limits of what was found.
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Three inexpensive RTC modules were logged against a GPS-disciplined reference for two weeks. The temperature-compensated part met its specification; the two uncompensated parts drifted five to eight times more than their headline figures suggest.
A walk through the update container used by a family of consumer network devices: how the header is laid out, which of its three checksums are enforced, and a small parser to reproduce the findings.
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