It worked perfectly— better , even: RSSI improved by 2dB.
She noticed a micro-short between the RF shield ground and a test point labeled TP_DBG . That test point was only present on v2—and shouldn’t connect to the antenna path.
A senior firmware engineer, , had joined six weeks ago from a rival firm. He had personally reviewed the v2 layout and added that test point "for calibration." bk m33 bt v2 pcb
She traced it to a tiny, intentional copper whisker hidden under the solder mask. Not a fab error— sabotage .
Two days before the pilot production run, all test boards started failing. Not burning—just dying silently. Packet loss spiked, then the radios went deaf. It worked perfectly— better , even: RSSI improved by 2dB
Management panicked. The investor review was in 48 hours.
She had the last known working "bk m33 bt v2 pcb" under the microscope. A senior firmware engineer, , had joined six
Maya didn't confront him. Instead, she hot-air-reworked the whisker, re-flashed the BK3433 with a custom firmware that rerouted the radio to a secondary antenna path (a forgotten v1 feature), and tested the board.
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