Specifications

The UART interface provides two signals. TXD and RXD pins are used for data, fixed baud rate, support
115200bps.
4.3 Hardware Design
1. It is recommended to use a DC stabilized power supply to power the module. The ripple factor
of the power supply should be as small as possible and the module should be reliably grounded;
2. Please pay attention to the correct connection of the positive and negative poles of the power
supply, such as reverse connection may cause permanent damage to the module;
3. Please check the power supply to ensure that between the recommended power supply
voltages, if the maximum value is exceeded, the module will be permanently damaged;
4. Please check the stability of the power supply, the voltage cannot fluctuate greatly and
frequently;