Introducing the next generation of sub-GHz wireless communication: the GT-38 Long Range 433MHz Transceiver. Engineered around the high-performance Silicon Labs SI4438 chip, this embedded module delivers unparalleled reliability and a proven 1200-meter communication distance.¹ Designed for simplicity, the built-in MCU enables transparent serial data transfer, making wireless integration into popular platforms like Arduino and other microcontroller projects seamless and fast.³

Key Features and Benefits

• 1200M Long-Range Reliability: Utilize the robust 20dBm (100mW) power output and superior link budget derived from the SI4438 for extended coverage in open fields (achieved in FU4 mode).
• Plug-and-Play UART Interface: Achieve instant wireless setup using standard 3.3V/5V TTL serial ports. The transparent transmission mode eliminates the need for complex RF protocol programming, presenting the module as a simple wireless bridge.
• Battery Life Optimization (80μA Mode): Select the FU2 mode to minimize idle current to just $80\mu A$. This feature dramatically extends the deployment life of battery-powered sensors and remote IoT devices, positioning the GT-38 as an energy-efficient choice.
• Flexible Network Topologies: The operational band of 433-458.5MHz offers up to 255 channels, ensuring channel separation and reliable communication. The module supports secure one-to-one, one-to-many, and many-to-many data links, facilitating complex network deployments.
• Enhanced Data Handling: The maximum number of bytes that can be sent in a single operation is up to 256 bytes, ensuring efficient bulk data transmission.

Detailed Technical Specifications