JESSINIE 2Pcs XL2300-SMT CMT2300A 433MHz Wireless Data Transmission Module Lora Wireless Transceiver Module SI4438/SI4432 1200M Distance Transmission

Characteristics Operating frequencies 420-510M conform to the international general ISM method high sensitivity -120dBm@2.4kBPs 433.92MHZ Maximum output power 20dBm FSK/GSK//GMSK/ook modulation With a 16-bit CRC check Manchester encoding, data whitening, forward error correction encoding Send and receive separate 64-byte FIFOs Low power dormancy current <1uA Timer wake-up function, wireless wake-up function (WOR) Use precautions Static electricity The wireless module is an electrostatic sensitive device, pay attention to electrostatic protection when using it, especially in dry winter, and try not to remove the device on the touch module to avoid unnecessary damage. Power Supply The wireless module recommends a DC power supply with a small ripple and a working voltage of 3.3V. The grounding of the module should be stable and reliable, and the ground wire should be as close to the power supply ground as possible. If a switching power supply is used, the decoupling must be strengthened to avoid the ripple and spike pulse of switching power affecting the module's working characteristics Single chip The interface can be connected directly to the port of a 3.3V single-chip computer without series isolation resistance. For example, when the single-chip computer is 5V, it needs to connect with the module by stringing a 2-4.7K resistance, otherwise, the port will be easily damaged. Whether or not to connect pull-up resistance depends on the type of single-chip computer port, and if it is an open-drain port, pull-up resistance needs to be added. With the hardware SPI control module, the SPI rate should not exceed 10M. If there is no hardware SPI, the IO port can also be used to simulate the timing control of SPI. In the case of multi-channel operation at the same time, the interval between each channel should be better than 1MHZ, otherwise, interference may occur easily