The Cricket is the smallest GNSS tracker I've ever seen. Kris' choice for a very compact LoRa module (Murata) combined with the performance (and size)of the u-blox CAM M8Q GNSS unit is a very smart one. Using the extensive Arduino libraries provided by his companion Thomas, it proved an rather straightforward task to built a prototype for a tracker and adapt it to the client's needs. As the design is optimized for ultra low power, we think we can meet the goal of operational lifetime of >1 year on a single battery easily. We were surprised by the performance of the u-blox GNSS unit. A location fix is quickly obtained, even indoors. Apart from the GNSS part, enough I/O capabilities are present on the device so you can use it in general IoT applications too. Highly recommended device!

For folks that are familiar with the Arduino family of microcontroller.
The developer personally addressed my difficulties.
I was able to get the desired -advanced- sketch for the accelerometer up and running.
(And I'm no good at C programming!)

Hi All,
This is my third board from these folks and I am super impressed!
If you do any research you will see that the STM32L496 is a a very grunty low power device...so having access to all this power thru the android IDE is really amazing.. I may still try working with it in System Workbench for STM32 (great Eclipse IDE variant) but only if I cant do what i want with arduino... I am not a sucker for punishment :-)
More than the board itself i have been very very impressed with the speed and quality of the support I have provided. I know i owe these guys some beers and perhaps some pizza ;-). Seriously I have bugged them a little more than i should but they have been awesome!
This dev board has saved me and my little company a great deal of time and hassle and I've learnt heaps (with some help as mentioned above)
So I feel this board is a super bargain so don't hestitate to buy!
Cheer,
Neal

We purchased the Dragonfly STM32L496RG to prototype an STM32L496RG based embedded system. Setting up with the Arduino toolkit was quick and easy. The detailed instructions online are easy to follow and allow you to get set up and coding within 30 minutes or less. With all the source code provided, it is easy to look through the PinDescription table to understand the pin mappings and features available as well and how to access them from the Arduino environment.

Highly recommend the STM32L4 based Dragonfly boards if you need a fast and easy way to get started with the STM32L4. The processing power, light weight, and large flash memory onboard make this ideal for battery operated portable or flying electronics.

This neat little board packs in 40 times the SRAM of a mega2560, and 4 times the flash memory, with faster clock speed AND lower power consumption! Plus an RTC...the list goes on.

Uploading sketches is also very convenient (okay, the first time is less convenient or if you use the USB-less options) but the core and the effort that went to it is impressive.

The speed/power consumption ratio is impressive and it uses about half the current that a Teensy uses. The sleep modes are fully implemented, so I quickly managed to bring my board down to 0.2mA power consumption with some peripherals. It can go even lower but 2 months of battery life on a tiny 130mAh cell is plenty enough for me :)

Documentation is still a work in progress, but the creators are very responsive and helpful. I've bought several more boards and looking forward to contributing documentation and bug fixes. Looking forward to their future boards as well!