3Pcs Geekcreit® HC-12 433MHz SI4438 Wireless Serial Module Wireless Transceiver Transmission Serial Communication Data B

Update information Change chip from SI4463 to SI4438 Shipped from 11 26 2019 Note HC 11 cannot communicate with the HC 12 they work independently used in pairs Features 1 Supply voltage 3 2V 5 5V If the module you want to work long hours in the emission state it is recommended that when the supply voltage exceeds 4 5V threaded a 1N4007 diode to prevent module built in LDO heated 2 Default address range open field test About 600m maximum communication distance adjustable reach 1000m the baud rate is 500bps 3 Default idle current 16MA In different working modes operating current is different 4 Module dimensions 27 8 x 14 4 x 4mm5 Operating frequency range 433 4 473 0MHz up to 100 channels of communication6 The maximum transmit power 100mW settable 7 Module support software upgrade8 Default factory settings Mode FU3 baud rate is 9600bps communication channels CH001 433 4M  9 Four transparent transmission modes adapt to different application occasions 10 Built in MCU free of programming only need to communicate with external devices through the serial port11 Unlimited number of bytes sent in a single time FU1 FU3 mode 12 The module supports one to one one to many many to one many to many connection transparent transmissionParameter nameReferenceParameter nameReferenceModelHC 12Module size27 4 x13 2 x 4mmFrequency Range433 4 473 0MHZWorking frequency433 4 473 0MHzCommunication InterfaceUART 3 3V 5V TTL levelAntenna interfaceSpring