Dernière mise à jour le 13 janvier 2024 par Suffocation
I'd asked for a Arduino Nano 33 BLE Sense Rev2 ordered and received a Nano 33 BLE. Oh well, „man“ takes what „man“ gets ;). No, I won't be using gender-neutral language here because that would distort the facts. Before I ramble on any further, I've had the thing lying in its box, unopened, since the year before last. As I'm currently busy with Bluetooth joysticks, gamepads, and other things and wanted to take a board from my stash, I unpacked the Nano 33 BLE and will give a very brief introduction here.
ATTENTIONThis Nano is not compatible with the original Nano as it operates at 3.3V instead of 5V. This is also indicated by the 33 in the name.
Facts
Here's an overview of the technical data. I've also included the original Nano and the IoT for BLE.
| Name | Arduino Nano | Arduino Nano 33 IoT | Arduino Nano 33 BLE |
|---|---|---|---|
| Number/CPU | 1 / ATmega328 | 2 / SAMD21 Cortex®-M0+ 32-bit low-power ARM MCU | 1 / 64 MHz Arm® Cortex-M4F (with FPU) |
| Clock speed (MHz) | 16 | 48 | 64 |
| Kernel | 1 | ?/? | 1 |
| Digital IOs / Pins | 14 | 14 | 14 |
| Analog inputs | 8 | 8 | 8 |
| Interrupt Pins | 2 | 11 | 14 |
| Pulse Width Modulation | 6 | 8 | 14 |
| SPI | 1 | 1 | 1 |
| Flash memory | 32k | 256 | 1 megabyte |
| RAM (KB) | 2000 | 32 | 256KB |
| EEPROM (KB) | 1000 | – | – |
| WiFi | – | 2.4 GHz 802.11b/g/n NINA-W102 |
– |
| Encryption | – | WEB / WPA2 / TKIP / AES? | – |
| Bluetooth | – | 4.2 BR/EDR / 4.2 Low power | NINA-B306 Module Bluetooth® Low Energy 5.0 Module Bluetooth® 5 Multiprotocol / Zigbee |
| UART | 1 | 1 | 1 |
| I2C | 1 | 1 | 1 |
| Ethernet | – | – | – |
| Video | – | – | – |
| Sound | – | – | – |
| Miscellaneous | – | – | LSM9DS1 (9-axis IMU) MPM3610 DC regulator NFC-A tag Nina B306 |
| USB | 1 Mini | 1 Micro | |
| Operating voltage [V] | 5-12V | 3,3 | 3,3 |
| Input voltage | 5 | 21 | 21 |
| Current (mA) / Standby (mA) | 40 | 7 / | 30 |
| Size L x W x H | 18x45x4 | 18x45x4 | 43,16 x 17,7 |
| Weight [g] | 7 | 7 | 5 |
Pinout
Schematic
Instructions
Areas of application
- Bluetooth-controlled applications with the mobile phone
Human Interface Devices (Mouse, Keyboard, Joystick)- BLE Audio Applications
Views
Programming
Install Board
The Nano33Ble itself must be installed via the Board Manager.
Gui1.x
GUI 2.x
It's already installed on my end, which is why it says 'Remove'.
Libraries
IMU LSM9DS1
https://docs.arduino.cc/tutorials/nano-33-ble/imu-accelerometer
The IMU Ship is an LSM9DS and Arduino offers its own library for it. Installation is possible via the library manager.
Bluetooth
For Bluetooth, Arduino has its own library that supports all of its chips.
It's already installed on my end, which is why it says 'Remove'.
Test programme
Bluetooth
The ArduinoBLE library includes a simple test program. This can be used to switch the LED on and off on the Nano board via Bluetooth.
Select test program, compile and upload to Arduino.
Android app to install on the phone to send readings to the Bluetooth device.
It also works for Apple users:
Launch Application
Select device
Below, enter 0 = for LED off or anything else for LED on and press the Write button.
Miscellaneous
Programming over the network
https://github.com/jandrassy/ArduinoOTA
Fritzing part
https://content.arduino.cc/assets/Arduino%20Nano%2033%20BLE%20Sense.fzpz
5 Volt supply to activate
The 5V USB voltage can be tapped from the 5V pin. This is good for sensors that require a 5V supply voltage. But please be careful, 5V on the inputs can damage the Nano.
The 5V pin is not connected on delivery. For this, there are two contact pads on the underside, which must be connected with solder. Please also refer to the following diagram.
Problems
No BLE connection on the phone
I suspect my Samsung Galaxy S8 is too old, I can see the Arduino in the Bluetooth monitor, but I can't use it in Light Blue.
Pairing with PC
Pairing with a PC or Mac is not currently supported by the Arduino BLE. This disqualifies the board, for example, as a regular HID device or as a BLE speaker. Under Windows and Mac, the board can be used, for example, via the Web Bluetooth API, JavaScript, and HTML5.
SOURCES
https://forum.arduino.cc/t/arduino-nano-33-ble-no-bluetooth-pairing/636789/5
https://developer.mozilla.org/en-US/docs/Web/API/Web_Bluetooth_API 49
https://googlechrome.github.io/samples/web-bluetooth/ 42
Conclusion
From my point of view, the Nano 33 BLE is completely overpriced; any ESP32 can do almost as much. But only *almost*. The 9-degrees-of-freedom IMU is a real bonus and isn't cheap, which certainly contributes to the high price. Also, being in the familiar form factor, the board is perfect for a breadboard, which isn't the case for most ESP boards. The integration into the Arduino GUI is, as usual, good. Worth highlighting are the analogue ports and the interrupts that work on all digital pins.
The small drop of disappointment remains, the high price of ~22€. For those who don't need so many ports, it's with the ESP32 cheaper on the go and includes a display and Wi-Fi for under €10. However, the IMU has to be operated externally.
The USB port takes a bit of getting used to; after programming, a reset is performed, which is reminiscent of the Leonardo. The micro USB port is also no longer entirely up-to-date.
Related Posts
Sources
Arduino Bluetooth Contribution
https://github.com/jandrassy/ArduinoOTA
https://forum.arduino.cc/t/arduino-nano-33-ble-no-bluetooth-pairing/636789/5
https://developer.mozilla.org/en-US/docs/Web/API/Web_Bluetooth_API 49