BTM430 and BTM431 Series Bluetooth Module

Recommended for New Design (RND)

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/IC & CE
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
SMT
Logical Interfaces
UART (CTS, RTS, DTR, DSR, DCD, RI)
GPIO (8 lines shared)
Max Transmit Power
+4 dBm (from integrated antenna)
Operating Temp - Max (°C)
+85 °C
Operating Temp - Min (°C)
-40 °C
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 °C
Storage Temp - Min (°C)
-40 °C
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
Antenna Options Bluetooth Version Chipset (Wireless) Compliance Connector Type Data Rate Development Kit Contents Frequency Frequency Range (Max) Frequency Range (Min) Logical Interfaces Max Transmit Power Protocols Range Receive Sensitivity Software Wi-Fi Coexistence Wireless Specification
BTM431 Integrated Antenna v2.0 + EDR CSR BC04 FCC / IC / CE SMT 2.1 MBps Development board and software tools 2.4 GHz 2.480 GHz MHz 2.402 GHz MHz UART +4 dBm AT Command Set Up to 30 meters -84 dBm Terminal Software 2 wire and 3 wire schemes supported Bluetooth v2.0 + EDR
Antenna Options Bluetooth Version Chipset (Wireless) Connector Type Data Rate Frequency Frequency Range (Max) Frequency Range (Min) Logical Interfaces Max Transmit Power Protocols Range Receive Sensitivity Software Wi-Fi Coexistence Wireless Specification
DVK-BTM431 Integrated Antenna v2.0 + EDR CSR BC04 USB Pluggable 2.1 MBps 2.4 GHz 2.480 GHz MHz 2.402 GHz MHz USB +4 dBm AT Command Set Up to 30 meters -84 dBm Terminal Software 2 wire and 3 wire schemes supported Bluetooth v2.0 + EDR

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Documentation

Name Part Type Last Updated
Application Note - Bluetooth Latency and Data.pdf All Application Note 01-17-19
IC certificate BTM431.pdf All Certification 01-17-19
EN 300 328 Test Report - BTM431.pdf All Certification 01-17-19
EN 301 489-1-17 Test Report - BTM431.pdf All Certification 01-17-19
EN 62479 RF Exposure Report - BTM431.pdf All Certification 01-17-19
BTM400 Series DoC Sep2014.pdf All Certification 01-17-19
CE - EN 60950-1 LVD Grant (BTM4x1).pdf.pdf All Certification 01-17-19
CE - EN 62479 RF Exposure Test Report (BTM4x1).pdf All Certification 01-17-19
CE - EN 301 489-1-17 WLAN Test Report (BTM4x1).pdf All Certification 01-17-19
CE - EN 60950-1 LVD Test Report (BTM4x1).pdf All Certification 01-17-19
EU Declaration of Conformity - BTM4xx - 2017.pdf All Certification 01-17-19
EN 300 328 (2.4 GHz) BT EDR V1.9.1 - BTM4xx.pdf All Certification 01-17-19
EN 62311 - RF Exposure - BTM4xx.pdf All Certification 01-17-19
Radio Equipment Directive (RED) Updates - May 2017 All Certification 03-01-19
Draft EN 301 489-1-17 WLAN - BTM4xx.pdf All Certification 01-17-19
EN 50385 and 62311 - RF Exposure - BTM4xx.pdf All Certification 01-17-19
EN 300 328 V2.1.1 2.4G BT EDR - BTM4xx.pdf All Certification 02-04-19
RoHSII - EU WEEE Compliance BT RAMP v1 8 All Certification 07-12-19
Release Notes - BTM43x Firmware version 11.28.1.0.pdf All Documentation 01-17-19
User Guide - BTM43x.pdf All Documentation 01-17-19
Mini Dev Kit Comms - BTM41x BTM43x BTM44x v1.pdf All Documentation 01-17-19
PCN - BTM4x1 Label Change - 12 Aug 15.pdf All Documentation 01-17-19
EOL - Bluetooth - Nov-15-2015.pdf All Documentation 01-17-19
Product Brief - BTM43x.pdf All Brochure 03-04-19
Datasheet (HIG) - BTM43x Modules.pdf All Datasheet 03-04-19
MultipointHostSourceLibrary BISMII.zip All Software 01-17-19
Bluetooth Development Kit Terminal Download.zip All Software 01-17-19
Application Note - Guidelines for Replacing Antennas v1.0 All Application Note 01-17-19

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.

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.