SparkFun BlueSMiRF V2 - Bluetooth Serial UART Link w/ Headers (3.3V-5V)
Wireless Bluetooth® UART link
High-speed duplex up to 921600 bps
Easy pairing with onboard button
OTA firmware updates via WiFi
Versatile 3.3V-5V input with regulator
The SparkFun BlueSMiRF V2 - Bluetooth Serial UART Link w/ Headers (3.3V-5V) serves as a wireless Bluetooth serial link, facilitating the transmission of serial data without the need for cables. This device operates as a wireless serial UART pipe, allowing for seamless data transfer between two devices with a baud rate ranging from 2400 to 921600. It is capable of duplex transmissions at speeds up to 921600bps, ensuring that data is buffered, transmitted, and received accurately.
The BlueSMiRF V2 boasts several enhancements over its predecessor, maintaining compatibility with the pinout of previous Bluetooth Mates and USB-to-serial converters, thus ensuring ease of connection with a variety of development boards and precision GNSS breakout boards. It can be directly connected to boards such as the Arduino Pro Mini, LilyPad Arduino 328 Main, and others with a standard 6-pin serial connector. The inclusion of a row of 1x6 male, right-angle headers allows for direct connection to a female header or use in a breadboard, making it an ideal choice for short-range applications within a 100ft (33m) indoor range that require straightforward, point-to-point communication.
The BlueSMiRF V2 can interface with phones or computers for data viewing or remote control. Pairing two BlueSMiRF units is simplified with the onboard PAIR button, which can be disabled if necessary. The device is designed to be configured remotely via a serial terminal app on a phone, with settings such as baud rate, flow control, and LED mode adjustable through an AT command set. It also supports Over The Air (OTA) firmware updates via WiFi.
This version includes an onboard voltage regulator, accommodating power inputs between 3.3V and 5V, and features logic level shifting circuitry on all pins for voltage tolerance. It is equipped with two LEDs that indicate connection status and serial UART traffic. The BlueSMiRF V2 primarily supports Bluetooth classic (Serial Port Profile or SPP), which is compatible with Android phones, most desktops, and laptops, and also offers support for the BLE protocol, which is available on all Apple phones.
Please note that for higher voltages, an RS232 to TTL converter is required. Additionally, a jumper is present to bypass the voltage regulator if needed.
1x SparkFun BlueSMiRF v2 board with pre-soldered headers
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
A valid Return Authorization (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
The RA number is valid for 30 days. The returned item must be received within that period.
The RA number must be included with the return.
Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
Refunds are processed within 7 days after receipt and inspection of the returned item.
A $100 cleaning fee may apply to domestic robots returned in used or unclean condition.
A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
Consumables — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odor-absorbing products). Not eligible for return once unsealed.
Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
Clearance Items — Products identified as clearance or final sale, including end-of-life or discontinued items.
Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
On-Demand Items — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfill a customer request.
While the same return policy applies, these orders require a separate contact process for returns.
RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".
