Microchip Technology

This product is not recommended for new designs-consider using the [**RNWF02**](https://www.microchip.com/en-us/product/rnwf02pc)as an alternative. View our [**RN Wi-Fi Migration Guide**](https://microchip.my.site.com/s/article/KB-000014336-RN-Wi-Fi-Module-Migration-Guide) for more information on making the transition. **Important Note:** We assessed the RN131 against the new RED Directive EN 300 328 v2.2.2 standard and the module cannot meet this new standard due to new, more rigorous test limits with which the radio cannot meet the minimum performance criterion. This means that going forward, the device is not compliant for operation within countries that require this standard. Firmware version 4.83 provides fixes for the Key Reinstallation attack or 'Krack' vulnerability. The [Firmware](https://ww1.microchip.com/downloads/en/DeviceDoc/wifly3-483.zip) and [Release Notes](https://ww1.microchip.com/downloads/en/DeviceDoc/Release_Notes_RN171_RN131_v4%2083.pdf) are available under the Documentation tab. The RN131 is a full-featured 802.11 b/g Wi-Fi module, and a complete, ultra-low power embedded TCP/IP solution. The combination of ultra-low power and the ability to wake up, connect to a wireless network, send data, and return to sleep mode in less than 100 milliseconds, allows the RN131 to run for years on two standard AAA batteries. Using only 35mA when awake and 4µA when asleep, this remarkable power efficiency makes possible a new class of internet-enabled products. For evaluating the RN131 module, Microchip offers the [RN-131-EK](https://www.microchip.com/en-us/development-tool/rn-131-ek), an evaluation kit that can be used to quickly add Wi-Fi connectivity to embedded applications. As simple as plugging in a USB drive, it has the flexibility to connect directly to a PC via a standard USB interface or to embedded processors through the TTL/UART interface. Microchip also offers the small form factor 802.11 b/g [RN171](https://www.microchip.com/en-us/product/rn171) Wi-Fi module for embedded Wi-Fi applications. **For the latest firmware details and corresponding part numbers, please visit:** <https://www.microchip.com/en-us/products/wireless-connectivity>

This product is not recommended for new designs-consider using the [**RNWF02**](https://www.microchip.com/en-us/product/rnwf02pc) as an alternative. View our [**RN Wi-Fi Migration Guide**](https://microchip.my.site.com/s/article/KB-000014336-RN-Wi-Fi-Module-Migration-Guide) for more information on making the transition. **Important Note:** **We assessed the RN171 against the new RED Directive EN 300 328 v2.2.2 standard and the module cannot meet this new standard due to new, more rigorous test limits with which the radio cannot meet the minimum performance criterion. This means that going forward, the device is not compliant for operation within countries that require this standard.** **Firmware version 4.81 is the latest production firmware version available for the RN171. To receive the latest firmware version 4.81, please order part number** [**RN171-I/RM481**](http://www.microchipdirect.com/ProductSearch.aspx?keywords=RN171-I/RM481)**.** For more information about firmware version 4.81, please see the [Release Notes](https://ww1.microchip.com/downloads/en/DeviceDoc/RN171,%20RN131%20Firmware%20v4.81%20Release%20Notes.pdf). Firmware version 4.83 provides fixes for the Key Reinstallation attack or 'Krack' vulnerability. The [Firmware](https://ww1.microchip.com/downloads/en/DeviceDoc/wifly7-483.zip) and [Release notes](https://ww1.microchip.com/downloads/en/DeviceDoc/Release_Notes_RN171_RN131_v4%2083.pdf) are available under the Documentation tab. The RN171 is a small form factor, ultra-low power embedded TCP/IP module measuring only 27 x 18 x 3.1 mm. The RN171, like the [RN131](https://www.microchip.com/en-us/product/rn131), is a full-featured 802.11 b/g surface mount module. Due to its small form factor and extremely low power consumption, it is perfect for mobile wireless applications such as asset monitoring, sensors, and portable battery operated devices. For quickly and easily evaluating the RN171 module, Microchip offers the [RN-171-EK](https://www.microchip.com/en-us/development-tool/rn-171-ek), a compact, battery and USB-powered kit with push buttons for SoftAP and WPS mode. **For the latest firmware details and corresponding part numbers, please visit:** <https://www.microchip.com/en-us/products/wireless-connectivity>

This product is not recommended for new designs-consider using the [**RNWF02**](https://www.microchip.com/en-us/product/RNWF02PC)as an alternative. View our [**RN Wi-Fi Migration Guide**](https://microchip.my.site.com/s/article/KB-000014336-RN-Wi-Fi-Module-Migration-Guide) for more information on making the transition. **Important Note:** **We assessed the RN1723 against the new RED Directive EN 300 328 v2.2.2 standard and the module cannot meet this new standard due to new, more rigorous test limits with which the radio cannot meet the minimum performance criterion. This means that going forward, the device is not compliant for operation within countries that require this standard.** The RN1723 is a small form factor, ultra-low power embedded TCP/IP/UDP Wi-Fi module measuring only 27 x 18 x 3.1 mm. The RN1723 is a full-featured 802.11 b/g surface mount module that is footprint compatible with the [RN171](https://www.microchip.com/en-us/product/rn171) Wi-Fi module. With an impressive 4µA Sleep mode, and a new power-saving DOZE mode, the RN1723 is extremely power efficient, making it ideal for a vast range of applications that require many years of battery life. Additionally, the RN1723 offers advanced SSL/TLS security that runs on an external PIC32 MCU enabling highly secure client/server communication. The RN1723 is configured via simple ASCII commands for ease of development and quick time to market.

The RN2903 is a fully-certified 915 MHz module based on wireless LoRa® technology. The RN2903 utilizes a unique spread spectrum modulation within the Sub-GHz band to enable long range, low power, and high network capacity. The module's embedded LoRaWAN Class A and Class C protocol enables seamless connectivity to any LoRaWAN compliant network infrastructure, whether public or privately deployed. The module is specifically designed for ease of use, which shortens development time and speeds time to market. LoRa technology is ideal for battery-operated sensors and low power applications such as IoT, M2M, Smart City, Sensor networks, Industrial automation, and more. LoRaWAN frequency bands supported: US902-928: RN2903A-I/RM AU915-928: RN2903A-I/RMSA Microchip's complimentary and confidential [Wireless Check online design review service](https://www.microchip.com/design-check-services) is available for customers who have selected our products for their application design-in\*. \*The online design review service is subject to Microchip's [Program Terms and Conditions](https://www.microchip.com/design-check-services-program-terms-and-conditions) and requires a myMicrochip account.

**Important Note: The Bluetooth SIG has deprecated Bluetooth 4.0. Bluetooth SIG will not qualify any new designs. Existing designs with the RN4020 are unaffected. Check out the Bluetooth SIG site for additional details**[**HERE**](https://www.bluetooth.com/specifications/archived-specifications/)**.** **For future designs, please consider** [RNBD451PE](https://www.microchip.com/en-us/product/rnbd451pe). **Firmware version 1.33 is the latest production firmware version available for the RN4020. To receive the latest firmware version 1.33, please order part number** [**RN4020-V/RMBEC133**](https://www.microchipdirect.com/product/search/all/rn4020-v/rmbec133)**.** **RN4020-V/RM123 – FW v1.23 Not recommended for new designs, please consider the** [**RN4020-V/RMBEC133**](https://www.microchipdirect.com/product/RN4020-V/RMBEC133)**.** **RN4020-V/RM120 – FW v1.20 Not recommended for new designs, please consider the** [**RN4020-V/RMBEC133**](https://www.microchipdirect.com/product/RN4020-V/RMBEC133)**.** **RN4020-V/RM – FW v1.10 Not recommended for new designs, please consider the** [**RN4020-V/RMBEC133**](https://www.microchipdirect.com/product/RN4020-V/RMBEC133)**.** For more information about firmware version 1.33, please see the [Release Notes](https://ww1.microchip.com/downloads/en/DeviceDoc/RN4020%20Firmware%201.33BEC%20Release%20Note-May2016.pdf). The RN4020 is a fully-certified, Bluetooth Version 4.0 low energy module for designers who want to easily add low power wireless capability to their products. The small form factor, surface mount module has the complete Bluetooth stack on-board and is controlled via simple ASCII commands over the UART interface. The RN4020 also includes all Bluetooth SIG profiles, as well as MLDP (Microchip Low-energy Data Profile) for custom data. Developers can utilize the scripting feature to enable standalone operation without a host MCU or Processor. The RN4020 can be remote controlled by another module over a secure connection and can be updated via the UART interface or over-the-air. The RN4020 has a built-in high performance PCB antenna optimally tuned for long range, typically over 100 meters. The compact size, 11.5 x 19.5 x 2.5mm, enables ease of integration in size-constrained applications. The RN4020 can be used with any low cost microcontroller for intelligent Bluetooth Low Energy applications. The RN4020 is fully-certified, has the complete Bluetooth stack on-board the module, and is controlled via a simple ASCII UART interface, making it a true drop-in solution that is easy to use, and easy to prototype, greatly speeding time to market. **Available iOS Applications for the RN4020:** [**Bluetooth Smart Discover**](https://apps.apple.com/us/app/bluetooth-smart-discover/id1004015467) Microchip’s Smart Discover for iPhone or iPad provides the ability to scan and connect to nearby Microchip Bluetooth Low Energy (BLE) peripherals, listen to BLE broadcasters and more. [**Bluetooth Smart Data**](https://itunes.apple.com/us/app/bluetooth-smart-data/id1004033562?mt=8) Microchip’s Smart Data provides the ability to scan, connect and exchange data between an iPhone or iPad and the RN4020 with Microchip’s Low Energy Data Profile (MLDP). **Android source code is available for the RN4020. Contact your** [**local sales office**](https://www.microchip.com/en-us/about/global-sales-and-distribution) **to request free source code.** **For the latest firmware details and corresponding part numbers, please visit:** [**www.microchip.com/wirelessfirmware**](https://www.microchip.com/en-us/products/wireless-connectivity)

Note: The Bluetooth SIG has deprecated and withdrawn Bluetooth 2.1 specification as of July 1, 2020. Existing RN42 and RN42N designs that are already Bluetooth certified are not affected. However, new RN42 and RN42N designs requiring Bluetooth certification cannot be certified as Bluetooth SIG has withdrawn Bluetooth v2.1. More information from Bluetooth SIG on Bluetooth 2.1 can be found here. The RN42 is a small form factor, low power, Class 2 Bluetooth radio for designers who want to add wireless capability to their products. The RN42 supports multiple interface protocols, is simple to design in, and is fully certified, making it a complete embedded Bluetooth solution. The RN42 is functionally compatible with the [RN41](https://www.microchip.com/en-us/product/rn41). With its high-performance PCB trace antenna and support for Bluetooth EDR, the RN42 delivers up to 3 Mbps data rate for distances up to 20 meters. The RN42 is available without an antenna (**RN42N**). This is useful when the application requires an external antenna. The RN42N is form, function, and pin compatible with the RN42. **Firmware version 6.30 is the latest production firmware version available for the standard RN42. To receive the latest firmware version 6.30, please order part number** [**RN42-I/RM630**](http://www.microchipdirect.com/ProductSearch.aspx?keywords=rn42-i/rm630) **Firmware version 5.50 is the latest production firmware version available for the RN42APL. To receive the latest firmware version 5.50, please order part number** [**RN42APL-I/RM550**](http://www.microchipdirect.com/ProductSearch.aspx?keywords=rn42apl-i/rm550)

The RN4678 is a fully certified Bluetooth Dual Mode (BR/EDR/LE) module, which enables the designer to easily add classic Bluetooth and Bluetooth Smart capability to their products. Delivering local connectivity for the Internet of Things (IoT), the RN4678 bridges the product to Smart Phones and Tablets for convenient data transfer, control and access to cloud applications. This Bluetooth SIG certified module provides a complete wireless solution with Bluetooth stack on-board, integrated antenna, and worldwide radio certifications in a compact surface mount package, 22 x 12 x 2.4 mm. It supports GAP, SDP, SPP, and GATT profiles. Data is transferred over the Bluetooth link by sending/receiving data via transparent UART mode, making it easy to integrate with any processor or microcontroller with a UART interface. Configuration is made easy through ASCII commands via UART. The Microchip Bluetooth Data (MBD) mobile app is available to speed up development for both [Android](https://play.google.com/store/apps/details?id=com.microchip.bluetooth.data) and [iOS](https://itunes.apple.com/us/app/microchip-bluetooth-data/id1319166097). Microchip's complimentary and confidential [Wireless Check online design review](https://www.microchip.com/en-us/support/design-help/design-check-services) service is available for customers who have selected our products for their application design-in\*. \*The LANCheck online design review service is subject to Microchip's [Program Terms and Conditions](https://www.microchip.com/en-us/support/design-help/design-check-services) and requires a myMicrochip account. **Firmware Release Summary, see Software Release Notes for details:** RN4678-V/RM123 - ANSSI fix (Web release only) RN4678-V/RM122 - Sweyntooth & BIAS fixes, SPP version 1.2, connection bug fixes. RN4678-V/RM113 - Added support for 1Mbps baud rate, added command to supporess "Rebooting" and "Trying" status messages. Fixed bonding issue with Paired Device List, and other minor bug fixes. RN4678-V/RM111 - Bluetooth name restored to default on factory reset. Other minor bug fixes. RN4678-V/RM100 - Initial Release.