RS232 to TTL converter MAX3232 Arduino IoT [ElectricA]

Serial port (DB9) is among the most popular interface between computer and devices such as GSM modem and RFID reader. However, since computer is using RS232 interface while microcontroller is using TTL UART interface, a level shifter is needed in order for the microcontroller to interface with the RS232 peripheral device.
 
URS232A is a TTL UART to RS232 Converter utilizing the MAX232 level shifter. It’s handy for interfacing microcontroller with RS232 device such as some GSM modem, RFID reader and etc. It can also be used together with the UC00A or UC00C USB to UART and becomes a USB to RS232 Converter. This board comes pre-soldered with male DB9 connector, MAX232 and capacitors.

Technical Specifications
Translator IC: MAX3232
TTL Header Pitch : 2.54mm / 0.1in
DB9 Connector Type: Female
Operating Voltage:3 V ~ 5.5 V
Maximum Data rate: 512 kbps / 0.5Mbps (please see detailed test report)
Temperature range: -40°C ~ 85°C
Operation: Full Duplex
Protocol: RS232
Transceiver : 2 (1 TTL -> RS232 + 1 TTL <- RS232)
Receiver Hysteresis: 300mV