BTM441 & BTM443 Series Bluetooth Module
Overview
The BTM44x series Bluetooth modules from Ezurio (formerly Laird Connectivity) have been designed to meet the needs of developers who wish to add robust, short-range Bluetooth data connectivity to their products. They are based on the market-leading Cambridge Silicon Radio BC04 chipset, providing exceptionally low power consumption with outstanding range. These modules support the latest Bluetooth Version 2.1 Specification, providing the important advantage of Secure Simple Pairing, which improves security and enhances the ease of use for end customers. In addition to Serial Port Profile, the BTM44x series features a number of additional features and profiles not found on other Bluetooth modules. Available in BTM440, BTM441, BTM442, and BTM443 variants.
Specifications
+4 dBm (from integrated antenna BTM441/443)
Part Number | Antenna Type | Bluetooth Version | Chipset (Wireless) | Connector | Dimension (Height - mm) | Dimension (Length - mm) | Dimension (Width - mm) | Frequency Range (Max) | Frequency Range (Min) | Input Power | Logical Interfaces | OS/Software | Power Consumption | Product Type | Protocols | Receive Sensitivity | Software | System Architecture | Technology | Transmit Power (Max) | Wi-Fi Coexistence | Wireless Specification |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
BTM441 Not Recommended for New Design (NRND) Buy Now | Internal | v2.1 + EDR | QCA (CSR) BC04 | SMT | 3.4 mm | 22 mm | 12.5 mm | 2480 MHz | 2402 MHz | 3.0 - 3.3V | Serial | AT Commands, Embedded Stack | < 40mA | Embedded Module | AT Command Set | -84 dBm | Terminal Software | Hosted | Bluetooth Classic, Bluetooth 2.1 + EDR | +4 dBm | 2 wire and 3 wire schemes supported | Bluetooth v2.1 + EDR |
BTM443 Not Recommended for New Design (NRND) Buy Now | Internal | v2.1 + EDR | QCA (CSR) BC04 | SMT | 3.4 mm | 22 mm | 12.5 mm | 2480 MHz | 2402 MHz | 3.0 - 3.3V | Serial | AT Commands, Embedded Stack | < 40mA | Embedded Module | Multipoint Mode | -84 dBm | Terminal Software | Hosted | Bluetooth Classic, Bluetooth 2.1 + EDR | +4 dBm | 2 wire and 3 wire schemes supported | Bluetooth v2.1 + EDR |
DVK-BTM441 Not Recommended for New Design (NRND) | Internal | v2.1 + EDR | QCA (CSR) BC04 | USB Pluggable | 3.4 mm | 22 mm | 12.5 mm | 2480 MHz | 2402 MHz | 3.0 - 3.3V | USB, Serial | AT Commands | < 40mA | Development Kit | AT Command Set | -84 dBm | Terminal Software | Hosted | Bluetooth Classic, Bluetooth 2.1 + EDR | +4 dBm | 2 wire and 3 wire schemes supported | Bluetooth v2.1 + EDR |
DVK-BTM443 Not Recommended for New Design (NRND) Buy Now | Internal | v2.1 + EDR | QCA (CSR) BC04 | USB Pluggable | 3.4 mm | 22 mm | 12.5 mm | 2480 MHz | 2402 MHz | 3.0 - 3.3V | USB, Serial | AT Commands | < 40mA | Development Kit | Multipoint Mode | -84 dBm | Terminal Software | Hosted | Bluetooth Classic, Bluetooth 2.1 + EDR | +4 dBm | 2 wire and 3 wire schemes supported | Bluetooth v2.1 + EDR |
Documentation
CSR Bluesuite Bluetest3 crashes when trying to select the transport.
Bluesuite is a very old program supplied by CSR for testing and configuration of its legacy Bluetooth modules. Bluesuite Bluetest3 is often used for RF testing where the DUT is put into BCSP mode before running Blutest3.
If Bluetest3 crashes with an "array" error you may have a conflict or issue with your .net installation. You may be able to fix the issue by removing all versions of .net but please speak to your IT department first as this may cause issues with other software.
Is it safe to run a Ezurio Bluetooth module through a PCBA wash cycle?
In general, cleaning the populated modules is strongly discouraged. Residuals under the module cannot be easily removed with any cleaning process.
- Cleaning with water can lead to capillary effects where water is absorbed into the gap between the host board and the module. The combination of soldering flux residuals and encapsulated water could lead to short circuits between neighboring pads. Water could also damage any stickers or labels.
- Cleaning with alcohol or a similar organic solvent will likely flood soldering flux residuals into the RF shield, which is not accessible for post-washing inspection. The solvent could also damage any stickers or labels.
- Ultrasonic cleaning could damage the module permanently.
However, if water washing is required you will need to use deionized water. We do not recommend chemical cleaning and cannot guarantee it will not damage the modules. If you MUST clean PCB with chemicals it is recommended that you test on one board and then confirm the module still works after the process, prior to adding it to production, while understanding the above affects washing the populated PCBs can have on the module.
What is the throughput of your bluetooth modules with the embedded AT command interface?
Our fully-embedded modules have a throughput of around 300-360 kbps. They have an on-board Bluetooth stack and do all of the Bluetooth processing themselves. Bluetooth 2.1 + EDR has a practical transfer rate of 2.1 Mbit/s, but this is not possible on a small embedded module that does not have a powerful PC-type processor.
BT 2.1 - SSP initiated by a BTM module
This article is designed to illustrate the process of Simple Secure Pairing (SSP) when initiated from a BTM module. Introduced in Bluetooth v2.1, SSP creates a bond in a very different way than the legacy PIN pairing many users are familiar with. This is demonstrated both for security level 2 (default) and security level 3.
Security Level = 2
Assumptions:
peer device is BT2.1 (supporting secure simple pairing)
security level of BTM device is
security level of peer device is
the pairing initiating device is aware of the peer device's Bluetooth Device Address
Note: Connections in Bluetooth v2.1 are always encrypted.
Figure 1: BTM vs BTM
Figure 2: BTM vs PC
Security Level = 3
Assumptions:
peer device is BT2.1 (supporting secure simple pairing)
at least one device with security level = 3 (MITM protection / authentication enabled)
the pairing initiating device is aware of the peer device's Bluetooth Device Address
Remarks:
Connections with BT2.1 are always encrypted
"MITM" = Man-In-The-Middle. "MITM protection" means "protection against a MITM attack".
MITM protection is equivalent with authentication
Figure 3: BTM vs BTM, security level 3
Figure 4: BTM vs PC, security level 3
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- Embedded RF hardware / firmware design
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- Product & Industrial Design
Buy Now
Distributor | Part | In Stock | Region | Buy |
---|---|---|---|---|
Avnet | BTM441 | 0 | North America | Buy Now |
DigiKey | BTM443 | 3547 | North America | Buy Now |
Mouser | BTM443 | 278 | North America | Buy Now |
Mouser | BTM443 | 278 | North America | Buy Now |
Future Electronics | BTM443 | 0 | North America | Buy Now |
DigiKey | DVK-BTM443 | 46 | North America | Buy Now |
DigiKey | DVK-BTM443 | 37 | North America | Buy Now |
Avnet | DVK-BTM443 | 0 | North America | Buy Now |
Future Electronics | DVK-BTM443 | 0 | North America | Buy Now |
Mouser | DVK-BTM443 | 0 | North America | Buy Now |
Distributors
Distributor | Phone Number | Region | Website |
---|---|---|---|
Arrow Electronics | 1-855-326-4757 +44 2039 365486 |
APAC, North America, South America, EMEA | Website |
Avnet | 1-480-643-2000 +44 1628 512900 |
APAC, North America, South America, EMEA | Website |
Braemac Australia, New Zealand, South East Asia | +61 2 9550 6600 +64 9 477 2148 |
APAC | Website |
Cal-Chip Connect | 1-215-942-8900 |
North America | Website |
DigiKey | 1-800-344-4539 |
North America, South America, APAC, EMEA | Website |
EBV Elektronik | EMEA | Website | |
Farlink Technology China, Hong Kong | +86 13266922199 |
APAC | Website |
Farnell | 1-800-936-198 +44 3447 11 11 22 |
EMEA | Website |
Future Electronics | 1-800-675-1619 1-514-428-8470 |
North America, South America, APAC, EMEA | Website |
Glyn | +49-6126-590-0 |
EMEA | Website |
Hy-Line Germany Only | +49 89 614 503 0 |
EMEA | Website |
Jetronic China, Hong Kong and Taiwan | 852-27636806 |
APAC | Website |
Laird Connectivity | 1-847-839-6925 +44 1628 858941 |
North America, South America, APAC, EMEA | Website |
M2M Germany | +49-6081-587386-0 |
EMEA | Website |
Martinsson | +46 8 7440300 |
EMEA | Website |
McCoy South East Asia | +65 6515 2988 |
APAC | Website |
Mouser | 1-800-346-6873 +44 1494 427500 |
North America, South America, APAC, EMEA | Website |
RS Components | +852-2421-9898 +44 3457-201201 |
North America, South America, APAC, EMEA | Website |
Ryoyo Japan | +81-3-3543-7711 |
APAC | Website |
Solsta UK Only | +44 (0) 1527 830800 |
EMEA | Website |
Supreme Components International India, South East Asia | +65 6848-1178 |
APAC | Website |
Symmetry Electronics | 1-866-506-8829 |
North America | Website |
Tekdis Australia and New Zealand | +61 3 8669 1210 |
APAC | Website |
Telsys | +972 3 7657666 |
EMEA | Website |
WPG | +44 1628 958460 |
EMEA | Website |