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.

| 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 |

Estimated time: 4 hours.

The module generally operates on DC 12V , matching the standard power supply of LED mirrors and shower controllers.

"And that thing?" she asked, pointing to the white dongle still protruding from the side of the old machine.

Bl12-a3 Bluetooth Jun 2026

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.

| 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 | bl12-a3 bluetooth

Estimated time: 4 hours.

The module generally operates on DC 12V , matching the standard power supply of LED mirrors and shower controllers. Using a standard 5V/2A USB charger, the BL12-A3

"And that thing?" she asked, pointing to the white dongle still protruding from the side of the old machine. The module generally operates on DC 12V ,