Description Features Long-distance wireless transmission (opening 1200 m/FU4 mode, air baud rate 1000bps) Operating frequency range (433-458.5MHz, up to 255 communication channels) Maximum 100mW (20dBm) transmit power (8-speed power can be set) Four working modes, suitable for different applications Built-in MCU, communicate through serial port and external device The number of bytes sent at one time is up to 256 bytes. Module supports one-to-one, one-to-many, many-to-many connection transparent transmission Specifications Model GT-38 Module size 26.7×12.9×6mm Chip Solution SI4438 Working frequency band 433~458.5MHz Communication Interface UART 3.3V/5V TTL Level Antenna interface spring antenna / antenna socket Working voltage 3.2~5.5V Sleep current no sleep mode Communication level 3.3V/5V level Working humidity 10%~90% Transmit power 20dBm (MAX) Working temperature -25°C~ 75°C Reference distance 1200m Storage temperature -40°C~ 85°C Documentation please see on this page.
