__link__: Bk M33 Bt V2 Pcb

Leo was escorted out. The board went into production as "."

She traced it to a tiny, intentional copper whisker hidden under the solder mask. Not a fab error— sabotage . bk m33 bt v2 pcb

The board was small—only 28x35mm—but packed a Cortex-M33 with TrustZone, 512KB flash, and a -96dBm BLE 5.2 radio. It was code-named "" internally. Leo was escorted out

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. bk m33 bt v2 pcb

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.