$7 Raspberry Pi Pico 2 W board launched with 2.4 GHz WiFi 4 and Bluetooth 5.2 wireless module

As expected, the Raspberry Pi Pico 2 W – the wireless version of the Raspberry Pi Pico 2 – is now available with an extra 2.4GHz WiFi 4 and Bluetooth 5.2 wireless module at an official price of $7. We’ll go through the specs and perform a mini review in this post trying out both WiFi and Bluetooth code samples.

It’s not the first Raspberry Pi RP2350 with WiFi and Bluetooth we’ve seen, as Pimoroni introduced the Pico Plus 2 W board with an RP2350B MCU and Raspberry Pi RM2 Wi-Fi and Bluetooth module, and iLabs launched the Challenger+ RP2350 WiFi6/BLE5 board relying on ESP32-C6 wireless module. However, the Raspberry Pi Pico 2 W is the official board, is cheaper, and will certainly be the most popular/widely used.

Raspberry Pi Pico 2 W specifications

Raspberry Pi Pico 2 W specifications:

• SoC – Raspberry Pi RP2350
  • CPU
    • Dual-core Arm Cortex-M33 @ 150 MHz with Arm Trustzone, Secure boot and
    • Dual-core RISC-V Hazard3 @ 150 MHz
    • Only two cores can be used at any given time
  • Memory – 520 KB on-chip SRAM
  • Security
    • 8KB of anti-fuse OTP for key storage
    • Secure boot (Arm only)
    • SHA-256 acceleration
    • Hardware TRNG
    • Fast glitch detectors.
  • Package – QFN-60
• Storage – 4 MB on-board QSPI flash
• Wireless – 2.4GHz 802.11n WiFi 4 and Bluetooth 5.2
• USB – Micro USB 1.1 host/device connector for power and programming
• Expansion – 26-pin GPIO header with
  • 2x UART
  • 2x SPI controllers
  • 2x I2C controllers
  • 24x PWM channels
  • 4x ADC
  • 3x PIO blocks, 12x PIO (Programmable IO) state machines
• Debugging – SWD debug interface
• Power Supply – 1.8 to 5.5V DC
• Dimensions – 51 x 21 mm
• Temperature Range – -20°C to +85°C
• MTBF Ground Benign – 182,000 hours
• MTBF Ground Mobile – 11,000 hours
• Production lifetime – Until at least January 2040

The Raspberry Pi Pico 2 W can be programmed with the Pico C/C++ and MicroPython SDKs, but you’d need to use the develop branch of the Pico SDK at this time, and pico-examples can be compiled with the PICO_BOARD=pico2_w flag. The MicroPython port is still under development as well, but a recent MicroPythom for Pico 2 W build can be found on Google Drive.

Raspberry Pi Pico 2 vs Pico 2 W comparison

Since I received a sample, I compared the Raspberry Pi Pico 2 to the Raspberry Pi Pico 2 W.

The most obvious changes are the wireless module and antenna, but the 3-pin debug header has also been moved to another location to make space for the antenna, and components are placed differently on the board. The location of the micro USB port, LED, and Reset button remains the same, and no changes were made to the GPIO headers either as can be seen on the bottom side comparison photo.

The position of the test points TP1-TP3 (GND and USB) is the same, but TP4-TP6 test points have been moved slightly down, and “TP7” in the center of the Pico 2 is gone on the Pico 2 W. Those would not be typically used, except potentially for BOOTSEL (TP6):

• TP4 – GPIO23/SMPS PS pin (do not use)
• TP5 – GPIO25/LED (not recommended to be used)
• TP6 – BOOTSEL
• TP7 – 1V1 (do not use)

Testing WiFi and Bluetooth using the Pico C/C++ SDK

I expect the instructions to use WiFi to be the same as for the Raspberry Pi Pico W. Let’s try this on the Raspberry Pi Pico 2 W using the Pico C/C++ SDK develop branch and samples on a laptop running Ubuntu 22.04.

Now let’s configure the build:

So far, I followed the same instructions as for the earlier board, except I selected the “develop” branch for the SDK and examples, and set PICO_BOARD=pico2_w to build the samples for the Raspberry Pi Pico 2 W. Let’s build the WiFi scan sample:

I used the Bootterm utility to wait for the serial console to show up:

But it never came as if the program was not running, and there was no USB serial interface in the kernel log.  But I did notice an error:

So I ran on the FAT partition (RP2350), but it did not help. So I copied flash_nuke.uf2 to “clean” the board, but still no luck. At this point, I decided to go back to basic trying the blink.uf2 sample, and it worked… At this point, I thought maybe Raspberry Pi decided not to use printf message to the serial console anymore, but do so through the Raspberry Pi Debug Probe. I’m not going to do this since this is was supposed to be a short post, and went to build the access_point demo instead using the same steps as for the wifi_scan.

There was still no output in the serial console, but the picow_test access point did instead show up. After connecting to it using the default password in the code (“password”), I was redirected to the web interface shown above to turn on or off the built-in LED.

That’s all great. Let’s have one last small test. When the Raspberry Pi Pico W was first introduced in June 2022, Bluetooth support was not implemented, and we had to wait for the release of the Pico SDK 1.5 in February 2023 for this to work. Let’s try one of the Bluetooth samples on the new Pico 2W board.

I could find an “HID Keyboard Demo…” in the list of devices, and I had no problem pairing with it.

That means both WiFi and Bluetooth will work at launch although I had to use the develop branch when I tested this, and the instructions are mostly the same as for its predecessor. I’m sure Raspberry Pi will soon release the Pico C/C++ SDK and MicroPython firmware for the new Pico 2 W board before users get their hands on it. You can purchase it from your preferred distributor for $7 plus taxes, shipping, etc…

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