The powerful stand-alone Bluetooth module OBS421 is a dual-mode (Bluetooth Smart Ready) module complete with embedded Bluetooth stack and serial port application. The OBS421 features a UART interface for transparent serial data transmissions. It can be used as a Bluetooth Smart Ready client for any host and it can access any Bluetooth Smart device that implements services based on the Generic Attribute Profile(GATT), such as a low energy battery service or an automation I/O service. The OBS421 can also be used in applications where a smart-phone, tablet or laptop is to connect to a serial device such as a Programmable Logic Controller (PLC).

Customers may embed their own applications, eliminating the need of an external application processor, thus saving considerably on the bill of material and PCB space. The middleware with easy-to-use interfaces speeds up and simplifies application development. Customer developed applications can make use of the additional module interfaces, such as GPIO, SPI, I2C, JTAG, and UART / USART and analog inputs. The module is fully Bluetooth qualified and provides modular radio type approvals for the US, Europe, Japan and Canada (FCC, R&TTE, MIC, IC). The OBS421 is also compliant with EMC, Safety and Medical standards. The robust module is easily configured via AT commands as well as cover a range of 300 meters, throughput up to 1.3 Mbps and operating temperatures of –30°C to +85°C.