BTM430 and BTM431 Series Bluetooth Module

Not Recommended for New Design (NRND)

Overview

The BTM430 and BTM431 Bluetooth modules from Laird 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. With a footprint as small as 12.5 x 18.0 mm for the BTM430 and best of class low-power operation these modules are the ideal choice for applications where designers need both performance and minimum size.

Note: The BTM430-xx variant has reached end of production and is available on a limited basis only. Only the BTM430 part numbers are affected. Find the End of Life Announcement in the Documentation tab below.

Specifications

Bluetooth Version
v2.0 + EDR
Antenna Options
Integrated antenna or External via Trace Pin
Chipset
CSR BC04
BT Class
Class 2
Certifications
FCC, ISED, EU
Compliance
Lead-free and RoHS compliant
Connector Type
SMT
Data Rate
Up to 2.1 Mbps (over the air)
Development Kit Contents
Development board and software tools
Dimension (Height - mm)
3.4 mm
Dimension (Length - mm)
22 mm
Dimension (Width - mm)
12.5 mm
Frequency Range (Max)
2.480 GHz MHz
Frequency Range (Min)
2.402 GHz MHz
Logical Interfaces
UART (CTS, RTS, DTR, DSR, DCD, RI)
GPIO (8 lines shared)
Operating Temp (Max) (°C)
+85
Operating Temp (Min) (°C)
-40
Power Consumption
Less than 40 mA during SCO transmission
Idle (sleep) < 1 mA
Profiles
Serial Port Profile (SPP), FTP Client, OBEX Client, HSP (partial), HFP (partial), DUN
Protocols
AT Command Set
Range
Up to 30 meters
Receive Sensitivity
Better than -84 dBm
Storage Temp (Max) (°C)
+85
Storage Temp (Min) (°C)
-40
Transmit Power (Max)
+4 dBm (from integrated antenna)
Voltage
Supply: 3.0 V to +3.3 V
I/O: 1.7 V to +3.6 V (independent of VCC)
Weight
.105 oz (3 g)
Wi-Fi Coexistence
2 wire and 3 wire schemes supported
Part NumberAntenna TypeBluetooth VersionChipset (Wireless)ComplianceConnectorData RateDevelopment Kit ContentsFrequency Range (Max)Frequency Range (Min)Logical InterfacesOS/SoftwareProduct TypeProtocolsRangeReceive SensitivitySoftwareSystem ArchitectureTechnologyTransmit Power (Max)Wi-Fi CoexistenceWireless Specification
BTM431
Not Recommended for New Design (NRND)
Buy Now
Internal v2.0 + EDR QCA (CSR) BC04 FCC, ISED, EU SMT 2.1 MBps Development board and software tools 2480 MHz2402 MHzSerial AT Commands, Embedded Stack Embedded Module AT Command Set Up to 30 meters -84 dBm Terminal Software Hosted Bluetooth Classic, Bluetooth 2.0 + EDR +4 dBm 2 wire and 3 wire schemes supported Bluetooth v2.0 + EDR
DVK-BTM431
Not Recommended for New Design (NRND)
Buy Now
Internal v2.0 + EDR QCA (CSR) BC04 USB Pluggable 2.1 MBps 2480 MHz2402 MHzUSB, Serial AT Commands Development Kit AT Command Set Up to 30 meters -84 dBm Terminal Software Hosted Bluetooth Classic, Bluetooth 2.0 + EDR +4 dBm 2 wire and 3 wire schemes supported Bluetooth v2.0 + EDR

Documentation

Name Part Type Last Updated
Application Note - Bluetooth Latency and Data.pdf All Application Note 01/17/2019
RoHS 3 - Bluetooth All Certification 01/04/2022
Release Notes - BTM43x Firmware version 11.28.1.0.pdf All Documentation 01/17/2019
User Guide - BTM43x.pdf All Documentation 01/17/2019
Mini Dev Kit Comms - BTM41x BTM43x BTM44x v1.pdf All Documentation 01/17/2019
PCN - BTM4x1 Label Change - 12 Aug 15.pdf All Documentation 01/17/2019
EOL - Bluetooth - Nov-15-2015.pdf All Documentation 01/17/2019
Product Brief - BTM43x.pdf All Product Brief 03/04/2019
Datasheet (HIG) - BTM43x Modules.pdf All Datasheet 08/29/2022
MultipointHostSourceLibrary BISMII.zip All Software 01/17/2019
Bluetooth Development Kit Terminal Download.zip All Software 01/17/2019
Application Note - Guidelines for Replacing Antennas v1.0 All Application Note 01/17/2019
EU Certifications - BTM4xx All Certification 02/16/2021
FCC Certifications - BTM41x All Certification 11/23/2020
ISED (Canada) Certifications - BTM41x All Certification 11/23/2020
MIC Certifications - BTM41x All Certification 11/23/2020
Regulatory Information - BTM4xx All Certification 02/15/2021

FAQ

Is it safe to run a Laird Connectivity 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 Laird Connectivity's product lifecycle EOL and PCN policy?

Laird Connectivity is committed to the long-term supply of all its standard embedded wireless modules and packaged products. Laird Connectivity’s products are specifically designed to meet the needs of the industrial and medical markets, which typically require 7 – 10 years product lifecycle. Although Laird Connectivity can’t guarantee that a component used in our products will not be obsoleted and cannot be reasonably substituted, Laird Connectivity can assure customers we will continue to sell our product when we have customer demand and can obtain the necessary components to build our products.

View our full policy here. 

Why isn’t a firmware upgrade available for the BTM43x?

There is no firmware available for download for the BTM43x as it has been very stable for the past few years. All of the BTM43x modules that were manufactured after November 1, 2010 should arrive pre-loaded with this firmware (v11.28.1.0). Version 11.28.1.0 is a comprehensive release of all previous features and bug fixes and is the default firmware loaded at production for all BT v2.0 AT modules. You can check the firmware version of your module by entering the "ati333" command in your terminal.

Become a Laird Connectivity Customer and Gain Exclusive Access to Our Design Services Team

  • Antenna Scans
  • Antenna selection and placement
  • Custom antenna design
  • Worldwide EMC testing / certifications
  • Embedded RF hardware / firmware design
  • Cloud architecture and integration
  • Mobile application development
  • Product & Industrial Design

Talk to an Expert

Buy Now

Distributor Part In Stock Region Buy
Farnell BTM431 0 EMEA Buy Now
Mouser BTM431 0 North America Buy Now
Newark BTM431 0 North America Buy Now
element14 APAC BTM431 0 APAC Buy Now
Digi-Key DVK-BTM431 1 North America Buy Now
Avnet DVK-BTM431 0 North America Buy Now
Farnell DVK-BTM431 0 EMEA Buy Now
Mouser DVK-BTM431 0 North America Buy Now

Distributors

Distributor Phone Number Region Website
Alpha Micro UK Only +44 1256-851770
EMEA 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
Cal-Chip Connect 1-215-942-8900
North America Website
Control Synergy +61-2-4966-5211
APAC Website
Digi-Key 1-800-344-4539
North America, South America, APAC, EMEA Website
EBV Elektronik EMEA Website
Farlink Technology +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
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
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