Modules > Bluetooth 2.1/4.0/4.1/4.2 > BlueMod+SR

Stollmann has been developing and marketing serial Bluetooth adapters and standard modules since 1999. As well as these modules, Stollmann also has a proprietary Bluetooth stack. This means that the technology is fully under control and extensive customer-specific adaptations can be made.

Bluetooth Smart Ready Module

BlueMod+SR is the next generation Bluetooth solution for cable replacement applications. Regardless if the application requires high throughput or low energy consumption, BlueMod+SR offers the best of both worlds. The module offers NFC handover as an additional feature. NFC handover enables easy Bluetooth pairing for Bluetooth classic and Bluetooth low energy. Searching for Bluetooth devices over the air is no longer required.

  • Solder-on installation
  • Integrated antenna or antenna pin
  • Bluetooth 4.0 qualified
  • Smart Ready (supports BR/EDR/LE)
  • NFC Handover
  • Designed and manufactured in Germany
  • Evaluation Kit "BlueEva+SR" available


The module is a very small form factor dual mode Bluetooth 4.0 module (17x10x2.6mm). Range in line of sight is about 100m.

Dual mode means it supports classic Bluetooth basic rate (BR) and enhanced data rate (EDR) operations as well as Bluetooth low energy (LE). Integration is easy and cost-effective thus reducing time to market and overall development cost of new products.

For basic rate operations it offers simple Serial Port Profile (SPP) connections with full Secure Simple Pairing. The module allows multiplexing solutions with two parallel connections. For basic rate and enhanced data rate the average net transmission speed is about 300 kbit/s.

For low energy operations the module offers the Terminal I/O profile. Terminal I/O allows transparent UART data and GPIO state transfer in low energy mode similar to SPP in basic rate mode. For low energy transmission with Terminal I/O the average transmission speed is about 50 kbit/s. In addtion to that the module comes with a generic GATT interface. This interface allows the use of any standard Bluetooth low energy profile.

It is also possible to tune the RF power to perfectly fit the application (max RF power is +7dbm).

The command interface is based on the well-known AT Command Set.

NFC Handover

From firmware version 1.502 on the BlueMod+SR is able to read and write its Bluetooth address to a dynamic NFC tag which can be used for Bluetooth pairing. The NFC Forum Type 2 compliant NFC tag NT3H1101 by NXP is supported. The NFC tag is connected to the BlueMod+SR via the I²C interface. The field detection function on the tag can be used to wake up the BlueMod+SR from standby and to initiate the Bluetooth communication.

Stollmann provides an NFC Utility App for Android devices for evaluating the NFC handover feature. The app can declare two intent filters for the NDEF data on the NFC tag, one for BR/EDR and one for Bluetooth low energy handover.

Technical Specifications

LengthxWidthxHeight 17 x 10 x 2.6 mm
Range (LOS) Up to 100 m
RF-power (max) -23 to +7 dBm (software adjustable)
UART 9600 bps - 921600 bps (asynchronous)
Other interfaces I²C, SPI
GPIOs 11
Temperature range -30° ... +85°C
Qualification Bluetooth 4.0, CE, FCC, IC, KCC, MIC
Profiles SPP, GATT, Terminal I/O
Antenna internal ceramic
Antenna external pin
Power supply 2.5V to 3.6V
Power consumption: transmission 15-27 mA (depending on connection parameter)
Power consumption: idle SPP. 0.75 mA / Terminal I/O: 0.25 mA
Power consumption: deep sleep 0.15 mA
Intergration LGA
Supported NFC tags NXP NT3H1101, NT3H1201