4 kanalų Bluetooth relių modulis 12V

Functional characteristics
Onboard high performance MCU and SPP-C Bluetooth 2.1 slave module;
The UART debug interface and the MCU program downloader are reserved.

Hardware introduction and description
Plate size: 62.7*63.2mm

Board function description:
IN+, IN-: 5V input;
TX, RX: UART serial pin;
5V, GND, SWIM, NRST: single chip program download port.
LED D2/D3/D4/D5 (red light): relay working indicator, light when opened.
LED D1 (blue light): the Bluetooth status indicator is described as follows:
(1) when the slow flash, it represents the connection between the waiting and the mobile phone.
(2) often on behalf of success and the establishment of a connection with the mobile phone.

Reserved 2 jumper caps: when normal use, please insert to the right side (that is, RX RX1, TX even TX1), if you want to use USB to TTL serial module debugging SPP-C module, please insert to the left end (otherwise there may be interference).

COMx: common terminal;
NCx: normally closed terminal, the relay is connected NC and COM before it is activated. This contact pair disconnects when relay is energized
NOx: Connects to COMx when relay is energized.

Relay control instructions (hex):
Turn on the first relay: A0 01 01 A2
Turn off the first relay: A0 01 00 A1
Turn on the first relay: A0 02 01 A3
Turn off the first relay: A0 02 00 A2
Turn on the third relay: A0 03 01 A4
Turn off the third relay: A0 03 00 A3
Turn on the fourth relay: A0 04 01 A5
Turn off the fourth relay: A0 04 00 A4