Hi Friends
Recently I buy a RS232 to bluetooth module
I read here a similar board (HC-05), but when I buy my board was to conect it in a balance that has a rs232 connector, then with a pc software and correct com port I thought to get values from the balance.
With a null modem cable I send a command and the balance send me the weight value. I would eliminate the cable and use this bluetooth module.
Can somebody help me understand better this BLK-MD-BC04-B_DEMO? It has a DB9 serial male for what? At the middle of the board has 4 holes, GND, power, TX and RX for what? A selector for slave and master. When pairing it creat 2 com ports for what? It can work in both ways (send and receive data)? Or use one com port for send and other for receive?
Hoppe You can help me use this module
Best regards
CPalha