| Command | Function | Example Response | |------------------|------------------------------------------|--------------------------| | AT | Test communication | OK | | AT+NAME=<name> | Change device name | OK | | AT+BAUD=<x> | Change baud rate (x = 1–9, see manual) | OK | | AT+ROLE=<0/1> | 0 = Slave, 1 = Master | OK | | AT+RESET | Reboot module | OK | | AT+ADDR | Get module’s MAC address | +ADDR=XX:XX:XX:XX:XX:XX |
The little module woke to a world of sparks. bl12-a3 bluetooth
The BL12-A3 Bluetooth module is a versatile wireless audio solution frequently found in smart home fixtures and industrial medical equipment. Originally designed for "stealth" integration into household items like LED mirrors and high-end shower systems, it has gained recognition for its stability in environments with high electromagnetic interference. Key Specifications & Capabilities | Command | Function | Example Response |
The BL12-A3 Bluetooth is a next-generation wireless technology that enables devices to communicate with each other over short distances. It is a variant of the Bluetooth 5.0 standard, which offers improved performance, range, and capacity compared to its predecessors. The BL12-A3 Bluetooth is designed to provide a secure, low-power, and high-speed connection between devices, making it an ideal solution for a wide range of applications. Key Specifications & Capabilities The BL12-A3 Bluetooth is
| 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 |