USR-GPRS232-730 GSM Modem RS232/485 to 2G GSM Converter ESP12E ESP8266 Amica NodeMCU Wifi Module first insert four AA batteries

first insert four AA batteries into the battery compartment located on the rear panel

720p at 120fps Video Codec H

and external hardware

ideal for rapid prototyping and classroom use

implement a PWM (Pulse Width Modulation) control circuit to reduce average power consumption and heat generation

USR-GPRS232-730 GSM Modem RS232/485 to 2G GSM Converter ESP12E ESP8266 Amica NodeMCU Wifi Module first insert four AA batteriesIndustrial Serial to IP cellular GPRS modem USR GPRS232 730 can convert the serial data RS232 485 into IP data and then transfer to data center through GPRS 2. 5G mobile network Quad band GSM GPRS EDGE 850 900 1800 1900 MHz Support double data centres, one main and another backup Connecting TCP IP and sending SMS via AT commands 1 RS232 serial port and 1 RS485 serial port (not use simultaneously) Flow Control: CTS RTS Transparent mode(TCP UDP) https