The STM4100 is a generic Bluetooth to UART module, designed to quickly add wireless UART communications capability to any project. The module is a truly integrated, plug-and-play solution, featuring a built-in low dropout voltage regulator, on-board ceramic antenna, and a unique low-profile connection, which gives the STM4100 several important advantages over SMT modules:

• Can be installed one at a time to add wireless functionality to the host PCB
• Easy to remove to repair or replace
• More useable boards space on the host PCB: components can be placed under the module
• Smaller financial investment (only buy as many modules as are needed in the short term)
• Perfect to use for prototyping

The Tx output can be disabled by applying a logic HIGH to the Tx Enable pin, which makes it possible to have the target board switch automatically between the wired and wireless modes.

Features

• Bluetooth 2.0 Class 1, FCC certified
• Range 330 ft (100 m)
• Baud rate 1200 bps to 234 Kbps (default 38400 bps)
• Small size: 1.31x.84" (33.2 x 21.4 mm)
• Low vertical profile
• On-board ceramic antenna
• Embedded Bluetooth Serial Port Profile (SPP)
• Operating voltage from +3.5V to +6.5V
• Signal levels TTL/CMOS compatible
• Tristateable Tx output
• 2-mm female 4x2 connector
• Programming header for quick firmware updates
• Available in small quantities

Pinout

1. Bluetooth Status
2. Bluetooth Connect
3. Ground
4. Tx Enable
5. Reset
6. Rx
7. V (+3.5..+6.5V) SUP
8. Tx

Dimensions

Please view the datasheet for diagrams and dimensions.