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Renesas announced two wireless microcontrollers on December 10, 2025: the RA6W1, which provides dual-band Wi-Fi 6, and the RA6W2, which adds integrated Bluetooth Low Energy (BLE). Both support 2.4 GHz and 5 GHz Wi-Fi; choose the RA6W2 when the same chip must also provide BLE connectivity.
What is the difference between the RA6W1 and RA6W2?
The main difference is integrated Bluetooth LE. Renesas describes the RA6W1 as a Wi-Fi 6 MCU, while the RA6W2 combines Wi-Fi 6 and Bluetooth LE. Renesas’s RA6W2 datasheet specifies Bluetooth LE 5.1.
| Feature | RA6W1 | RA6W2 |
|---|---|---|
| Connectivity | Dual-band Wi-Fi 6 | Dual-band Wi-Fi 6 and Bluetooth LE 5.1 |
| Wi-Fi bands | 2.4 GHz and 5 GHz | 2.4 GHz and 5 GHz |
| Main processor | Arm Cortex-M33, up to 160 MHz (Renesas, 2026 datasheet) | Arm Cortex-M33 Wi-Fi MCU; Bluetooth subsystem includes a Cortex-M0+ (Renesas, 2026 datasheet) |
| Implementation options announced | FCQFN and WLCSP packages; Wi-Fi module RRQ61001 | BGA package; Wi-Fi/Bluetooth LE module RRQ61051 |
| Design fit | Wi-Fi connectivity without integrated BLE | Wi-Fi and BLE connectivity in one device |
The RA6W1 datasheet lists Bluetooth coexistence as a feature, but coexistence support is not the same as an integrated Bluetooth LE radio and stack. If a design needs BLE, verify the complete radio, stack, antenna, and system requirements rather than treating coexistence as BLE support.
Does the RA6W1 support 5 GHz Wi-Fi?
Yes. Renesas specifies 1×1 Wi-Fi 6 operation on both 2.4 GHz and 5 GHz, with a 20 MHz channel width, for the RA6W1. The RA6W2 also supports both bands. The RA6W1 datasheet lists station and SoftAP modes, WPA/WPA2/WPA3 security and Enhanced Open, plus a TCP/IP stack available through socket APIs. Refer to the current Renesas documents for implementation details and supported configurations.
#1 Best Overall
- Adopts ESP32-C6-WROOM-1-N8 module with RISC-V 32-bit single-core processor, up to 160MHz main frequency, built-in 8MB Flash
- Integrated WiFi 6, Bluetooth 5 and and IEEE 802.15.4 (Zigbee 3.0 and Thread) wireless communication, with superior RF performance
- Type-C connector, easier to use. Onboard CH343 and CH334 chips can meet the needs of USB and UART development via a Type-C interface
- Rich peripheral interfaces, compatible with the pinout of the ESP32-C6-DevKitC-1-N8 development board, offers strong compatibility and expandability
- Castellated module allows soldering directly to carrier boards
What do the MCUs include?
RA6W1
Renesas lists an Arm Cortex-M33 running at up to 160 MHz and 704 KB of SRAM on its RA6W1 product page. Its datasheet also describes interfaces and peripherals including SPI, I2C, audio interfaces, ADC, and memory interfaces, along with secure-boot and cryptographic capabilities. These are manufacturer specifications, not independent performance measurements. The cited datasheet is R19DS0136EK0102 Rev. 1.02, dated April 16, 2026; check Renesas’s document page for a newer revision.
RA6W2
The RA6W2 datasheet describes a dual-band Wi-Fi subsystem alongside a Bluetooth LE radio, baseband processor, and qualified Bluetooth LE 5.1 stack. Its Wi-Fi feature set includes station and SoftAP operation, security features, and interfaces. The cited datasheet is R19DS0162EK0100 Rev. 1.00, dated May 29, 2026; check the live document page for updates.
Rank #2
- ESP32-C6 WiFi 6 microcontroller development board adopts ESP32-C6-WROOM-1-N8 module, which is equipped with RISC-V 32-bit single-core processor, up to 160MHz main frequency, built-in 8MB Flash
- Integrates WiFi 6, Bluetooth 5 and and IEEE 802.15.4 (Zigbee 3.0 and Thread) wireless communication, with superior RF performance
- Integrates rich peripherals including SPI, UART, I2C, I2S, LED PWM, SDIO and other interfaces, compatible with the pinout of ESP32-C6-DevKitC-1-N8 development board, more convenient to use and expand a variety of peripheral modules
- Onboard CH343 and CH334 USB HUB chips, supports USB and UART development at the same time via a USB-C port
- Comes with online examples and tutorials for ESP-IDF development environment
What devices could use a low-power Wi-Fi 6 MCU?
Renesas names smart-home, industrial, medical, and consumer products as target settings, with examples such as environmental sensors, smart locks, thermostats, monitoring cameras, and medical monitors. These are manufacturer application examples, not a guarantee that either MCU meets every product’s regulatory, safety, reliability, radio-range, or power requirements.
The company’s December 2025 announcement reported sleep-mode power figures from 200 nA to 4 μA and below 50 μA in DTIM10 mode. These are Renesas operating claims; the announcement’s figures alone do not establish measurement conditions or make a direct comparison with other chips. Renesas datasheets also describe battery life of “up to a year or more,” dependent on the application. Treat that as a conditional manufacturer claim, not a general battery-life guarantee.
Rank #3
- Product Description: This is an entry-level RISC-V MCU ESP32-C6 development board that integrates Wi-Fi 6, Bluetooth 5, and IEEE 802.15.4 (Zigbee 3.0 and Thread). Compact yet powerful, it features a rich set of peripheral interfaces and can be used in smart home, industrial automation, healthcare, consumer electronics, and other fields
- ESP32 Development Board: Utilizing the ESP32-C6-WROOM-1-NX series module, it features a RISC-V 32-bit single-core processor supporting up to 160MHz and 8MB of built-in Flash
- Comprehensive peripheral interfaces include SPI, UART, I2C, I2S, LED PWM, and SDIO. Pinout compatible with the ESP32-C6-DevKitC-1 development board, it supports a wide range of peripheral expansion devices for enhanced ease of use
- Multiple protocols: Supports Wi-Fi 6, Bluetooth 5, and IEEE 802.15.4 (Zigbee 3.0 and Thread). Its Bluetooth Low Energy subsystem supports Bluetooth 5 (LE) and Bluetooth Mesh
- User-friendly design: The onboard CH343 serial port and CH334 USB hub enable simultaneous USB and UART use and development via a single Type-C port
Modules, development support, and availability
Alongside the chips, Renesas announced RRQ61001, a Wi-Fi 6 module, and RRQ61051, a Wi-Fi/Bluetooth LE combo module. The company said its development kit includes flash, a PCB trace antenna, connectors, and an embedded power analyzer. It also named Renesas Flexible Software Package (FSP), e² studio, and an SDK as development support.
The original release said the RA6W1 was available in FCQFN and WLCSP packages and forecast RA6W2 BGA availability in Q1 2026. That forecast period has passed, but it does not establish current stock or shipment status. Check Renesas or an authorized distributor for current availability, exact module and kit part numbers, and compatible documentation.
Rank #4
- ESP32-C6 WiFi 6 microcontroller development board (with Pinheader), adopts ESP32-C6-WROOM-1-N8 module, which is equipped with RISC-V 32-bit single-core processor, up to 160MHz main frequency, built-in 8MB Flash
- Integrates WiFi 6, Bluetooth 5 and and IEEE 802.15.4 (Zigbee 3.0 and Thread) wireless communication, with superior RF performance
- Integrates rich peripherals including SPI, UART, I2C, I2S, LED PWM, SDIO and other interfaces, compatible with the pinout of ESP32-C6-DevKitC-1-N8 development board, more convenient to use and expand a variety of peripheral modules
- Onboard CH343 and CH334 USB HUB chips, supports USB and UART development at the same time via a USB-C port
- Comes with online examples and tutorials for ESP-IDF development environment
Renesas said in the launch announcement that its planned support period is 15 years for MCUs and 10 years for modules. These are company-announced support periods; confirm applicable terms directly with Renesas.
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- Choose RA6W1 if the design needs dual-band Wi-Fi 6 and does not need BLE integrated into this MCU, or if BLE is handled by a separate component.
- Choose RA6W2 if the product needs both dual-band Wi-Fi 6 and Bluetooth LE from one device.
- Check the module options if a pre-integrated radio module better fits the product’s development or manufacturing plan: RRQ61001 is the Wi-Fi module, while RRQ61051 combines Wi-Fi and Bluetooth LE.
For technical decisions, use the current product pages and datasheets to verify package, interfaces, security configuration, software support, and radio requirements against the intended design.
Quick Recap
Best Value
- Enhanced Connectivity: Combines 2.4GHz Wi-Fi 6 (802.11ax), Bluetooth 5(LE), and IEEE 802.15.4 radio connectivity, allowing you to apply the Thread and Zigbee protocols.
- Matter Native: Supports building Matter-compliant smart home projects thanks to its enhanced connectivity, achieving interoperability
- Security Encrypted on Chip: Powered by ESP32-C6, it brings enhanced encrypted-on-chip security to your smart home projects via secure boot, encryption, and Trusted Execution Environment (TEE)
- Outstanding RF performance: Has an on-board antenna with up to 80m BLE/Wi-Fi range, while reserving an interface for external UFL antenna
- Leveraging Power Consumption: Comes with 4 working modes, with the lowest being 15 μA in deep sleep mode, while also supporting lithium battery charge management.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
