Product Parameters
Onboard STM8S high-performance MCU serial port slave module
Bluetooth relay control APP is provided
Onboard Bluetooth status indicator and relay indicator
The UART debugging interface and STM8 SWIM program download interface are reserved
Control distance: 10m (open environment)
Operating voltage: DC 12V
Maximum DC control voltage: DC 30V
Maximum AC control voltage: AC 250V
Size: 20mm*62mm

Basic functions and instructions
IN+: positive terminal of the DC 12V power supply
IN-: DC 12V power source
COM: public terminal
NO: Normally open interface of the relay. The relay is suspended before closing and shorted with COM after closing
NC: normally closed interface of relay, short connected with COM before relay closing, suspended after closing

Basic operation instructions:
After the connection is correctly connected, install the "Bluetooth Smart Control" APP on the Android phone, search for the Bluetooth device and connect it. The pairing password is 1234, long press the gray box in the interface to add the serial port instruction, and input the name and content of the instruction (open the relay when the instruction content is A00101A2; Turn off the relay when the instruction content is A00100A1) and select to send in hexadecimal form, then click the corresponding box to control the switch of the relay, or download other Bluetooth apps in the APP store to control by sending instructions.
Tip: Currently, the module only supports Android system, not IOS.