BLUTHOOTH AND NRF MODULE

The GT-38 wireless serial communication module is a new generation of multi-channel embedded wireless data transmission module. The wireless working frequency band is 433-458.5MHz, and multiple channels can be set. The stepping speed is 100KHz, and there are 255 channels in total. The module’s maximum transmit power is 100mW (20dBm), the receiving sensitivity is -116dBm at 5000bps air baud rate, and the open distance can reach 1200m communication distance.

The module features stamp hole encapsulation and can be easily patch-welded. Its compact dimensions of 26.7mm × 12.9mm × 6mm (including the antenna cap and spring antenna) make it convenient for integration into various applications. The module includes a PCB antenna holder (ANT1) that allows users to connect an external 433M frequency band antenna via a coaxial line. Additionally, it has an antenna soldering hole (ANT2) for attaching a spring antenna, giving users the flexibility to choose the antenna that best suits their needs.

Equipped with an internal MCU, the module requires no separate programming, facilitating straightforward serial data transmission in various transparent modes. Users can select from multiple serial port transmission modes using AT commands based on their specific requirements. The four modes—FU1, FU2, FU3, and FU4—have average idle current draws of 3.6mA, 80μA, 16mA, and 16mA, respectively, with a maximum operating current of 100mA during full power transmission.