Top — Bkm33btv2pcb

The onboard copper trace antenna on the top of the board requires clear space to operate. Never house the module completely inside a sealed metal chassis, as this creates a Faraday cage that kills wireless range. If a metal housing is mandatory, position the PCB so the antenna portion protrudes through a cutout, or switch to an enclosure constructed of RF-transparent ABS plastic, acrylic, or wood. Isolating Common Noise Issues