The diversity of applications and protocols is a big challenge for the Internet of Things (IoT) devices to communicate in collecting data or exchanging messages without a hitch of protocol differences. In addition, security features are required to secure data transmitted between the end devices and the server. In this study, we developed a secure multiprotocol gateway that supports for RF, ZigBee, BLE, and Ethernet protocols and utilizes TCP / IP protocols for advanced data processing after the gateway exit. Additionally, we added a data encryption algorithm for data security transmitted through the proposed gateway. To display the data the server receives, we added a dashboard to the gateway. The proposed multiprotocol gateway has been simulated using testbed environment in which the transmitted data was encrypted by default. The results showed that WiFi has the highest throughput compared to BLE and XBee, while the transmission delay tends to increase for all protocols but WiFI has the lowest delay compared to XBee and BLE.