1. Onboard AIR780E4G-CAT.1 full network module, supports AT firmware and LUATOS 2 development methods, easy for seco.ndary development, and LUATOS development is recommended 2. The onboard RS232 chip is connected to the main serial port (MAIN UART) of AIR780E, supporting baud rates: 230400/115200/57600/38400/19200/9600/4800/2400 3. Onboard flip-top NANO SIM card slot, supports inserting ordinary 4G mobile phone card/IoT card 4. Onboard TYPE-CUSB program burning port and BOOT button facilitate secondary development and upgrade of firmware/program 5. Onboard IPEX1 generation and SMA4G antenna interface (choose one of the two) Onboard power indicator (red) and network status indicator (blue) Support TYPE-CUSB 5V power supply or KF128 terminal DC8-36V wide voltage power supply Description: Air780E 4G to RS232 data transmission module adopts Air780E 4G-Cat.1 full network module. The onboard RS232 chip is connected to the main serial port of Air780, which can realize two-way transmission and reception of 4G and RS232 data. The reserved program burning interface can use LuatOS or AT software to develop its own 4G DTU data transparent transmission module, which can be used to remotely control various devices that support RS232 interface control such as water pump controller. Support USB5V/DC8-36V wide voltage power supply. Note:due to different production batches, the printing screen printing/appearance is different, which does not affect the use. Colour:Blue Material:PCB Package Contents: 1 * Air780E 4G to RS232 data transmission module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.