HM-10, HM-11 series Bluetooth module using TI CC2540/2541 chip, configuration 256Kb space, support AT commands, you can change the role (master and slave mode) and the baud rate, the device name, Pairing password and other parameters, convenient and flexible. ...
JNHuaMao makes different kinds of Bluetooth modules. In this case they designed the board and wrote a firmware for the TI chip to implement the needed functionality. The firmware determines the interface that will be used to control the module over serial connection. Another Chinese company, “...