This product is a parallel RF wireless transmitter module, the frequency is 433.92MHz. The module has 12 pins, of which there are four pins can be connected to external buttons. When a button is pressed, making the signal at low state, the module will be triggered and transmit the button status signal. The four buttons can be operated at the same time, so we call it a parallel transmitter module.
The communication protocol is proprietary, therefore the module must use with a corresponding RF wireless receiver module (PRODUCT ID: BCM-68F2420-C01) to form a complete transmit / receive function.
To facilitate the use of the transmitter modules, we make the RF wireless transmitter module evaluation board (PRODUCT ID: BCE-GENTX-X01). The evaluation board has buttons, LED, battery slot, etc., it can save your time to make peripheral circuits. By simply inserting the transmitter module into the evaluation board, you can quickly start using the transmitter module.
The MCU of this module is BC68F2130 from Holtek Semiconductor Inc., it has 2K x16 program memory. We have another transmitter module (Product ID: BCM-68F2123-X02) which uses BC68F2123 MCU. BC68F2123 has 1Kx14 program memory, it probably helps cost control when your design goes to mass production.