Thanks for the nice review. The way we organized the limited flash determines the upload rate, which is rather slow. Nothing can be done about that at the moment, no trick. I hope the functionality outweighs the inconvenience for you. Kris
After testing many other LoRa boards and being disappointed, I found this insanely small "Gnat" board to be outstanding! The the heart of the LoRa module is a Murata design, shielded and uses an effective TCXO. When you see typical LoRa boards being advertised, they are unshielded designs which drift in frequency (not designed using a TCXO). The GNSS chip is made by u-Blox, a company I have designed-into my Telematics/IoT systems for over 8 years!
Oh, and I found the typical LoRa antennas thrown in to the board purchase to be unmatched (poor VSWR) and hence useless. The Gnat board worked so well I ordered many of the other boards from this company including the Sensor Tile, Grasshopper, and several Cricket Long boards.
All great boards which worked perfectly upon power-up!
Thanks for the kind words Joe. I am glad these devices are working so well for you!
I am working on a new design with a ZOE GNSS module and an integrated 25 mm x 25 mm passive antenna which will also use the Type AZ Murata module.
Later this year, I will introduce our first asset tracker using the STM32WB55 MCU with embedded BLE 5.0 stack along with a UBLOX GNSS engine (not sure which one yet). Lot's of exciting developments to come!
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.
It saved me a lot of time while prototyping on a host board with limited space. This low power family of MCUs is very interesting as they pack a lot of features and pretty decent amount of memory / CPU power, and I liked how Ladybug exposes all the peripheral's interfaces so it allowed me to test in a very short time that the MCU can do what was I needed it to do, and how it performs. There was no problem setting it up with GNU toolchain (to get bit better performance from it and more control than when using Arduino IDE). Great work - thank you!
As a long-time fan and successful user of the ARM Cortex M4-based Teensy board and Pesky Products shields for it, I was excited to see this new line of Arduino-compatible boards based on the hugely popular STM32 line of ARM Cortex processors (found inside nearly every flight controller on the market). Having spent several months trying (and mostly failing) to get my STM32 flight controllers working with Arduino libraries for cutting-edge sensors (like the VL53L0X ranger), I figured it was time to go back to Teensy, or wait till someone did it right, with full-on Arduino IDE and library support. Well, Tlera Corp has done it right, thanks in part to the excellent STM32L4 Arduino library from "GrumpyOldPizza" (just that name has gotta make you smile!) I followed GrumpyOldPizza's simple instructions and had my Ladybug talking to my VL53L0X, using the library from Pololu, in about 15 minutes. I still love the Teensy, but I feel like Ladybug (and Tlera's other STM32L4 based boards Dragonfly and Butterfly), with their ultra-low power consumption and floating-point capability, are going to be my default solution for new microcontroller projects from now on.
First Look: Got a pair of these hand built (somehow) by Kris - no sign of problems - they work very well with the Arduino IDE doing what I can without soldering them so far. Impressively small and low power. Made use of the User Button easily! Reliable for uploads - and the code does what you tell it to. Now I have three add on boards to solder up for 9DOF/Mic/EEPROM. At this early stage more DOCS are on the way - but Kris is great at communication so both get 5 stars. 5 stars on the Product, and also Shipping as it was in my mailbox before I expected it to even ship.