| Pin | Name | Description | |-----|---------|----------------------------------------| | 1 | VCC | Power input (3.3–5V) | | 2 | GND | Ground | | 3 | TXD | UART transmit (connects to MCU’s RX) | | 4 | RXD | UART receive (connects to MCU’s TX) | | 5 | STATE | Bluetooth connection status (HIGH when connected) | | 6 | EN/KEY | Enable / AT command mode trigger |
She pulled the security footage from the warehouse. 2:47 AM, October 12th. A man in a gray hoodie walked past three checkpoints using a valid badge—badge number 4472, assigned to a janitor who had quit six months ago. The man approached the cage, unlocked it with a key that shouldn’t have existed, and removed exactly one item: the sealed metal box containing BL12-A3 #2047.
You are most likely to encounter the BL12-A3 identifier when pairing a smartphone to one of the following: 1. Smart Bathroom Mirrors bl12-a3 bluetooth
: Up to 30 feet (approximately 10 meters) without obstacles. Protection Rating , making it splash-proof and suitable for bathroom use. Power Supply 3. Troubleshooting & Reset If you experience connectivity issues, try the following: Visibility Check
Elias didn't waste a second. He dragged the folder labeled BLUEPRINTS_192 onto his modern workstation's receive buffer. A progress bar appeared. The man approached the cage, unlocked it with
View detailed installation and operation instructions in this Bluetooth Speaker User Guide
: Connect your mirror to the power supply. You should hear a short audio signal indicating the speakers are active. Enable Bluetooth Protection Rating , making it splash-proof and suitable
Using a standard 5V/2A USB charger, the BL12-A3 goes from 0% to 100% in approximately 2.5 hours. The red LED turns off when fully charged.