EByte E62-433T20S 433MHz Full-Duplex FHSS Wireless Module

Configure paired modules by setting identical parameters via AT commands over the UART interface before operation. You must match the device address, frequency hopping sequence, and channel. Ensure both modules are powered with a stable 5V supply and have proper antenna connection. The default serial parameters are 115200 baud, 8 data bits, no parity, and 1 stop bit. After configuration, the modules enter transparent transmission mode, acting as a wireless serial cable.

The module requires a 5V DC power supply for the radio section, while its UART logic levels are 3.3V TTL compatible. It draws approximately 104mA during transmission and 33mA while receiving. For low-power applications, you can implement hardware sleep by controlling the module's enable or power-down pins via your microcontroller. There is no built-in software deep sleep command; power cycling is the primary method. Always ensure your power source can handle the transmit current surge for stable operation.

Use a 433MHz antenna with a 50-ohm impedance, such as a whip or dipole, matched to the module's frequency range for optimal performance. The module provides an IPEX (U.FL) connector for direct antenna attachment and alternative stamp holes for soldering a wire antenna or connector pad. Ensure the antenna is vertically polarized and has a clear line of sight for maximum range. Proper impedance matching at the stamp holes is critical to prevent signal reflection and power loss.

Connect the module's VCC pin to 5V, but its TXD and RXD pins are 3.3V TTL logic and can be directly connected to a 3.3V microcontroller's UART pins without level shifting. Ensure your ESP32's UART is configured for the correct baud rate (default 115200). The module's 3.3V logic level is tolerant, but for bi-directional communication, connect MCU RX to module TX and MCU TX to module RX. Ground connections must be shared. No additional voltage divider is needed on the data lines.