The Arduino core for the CMWX1ZZABZ is almost ready; I am as anxious to put it to use as anyone. As soon as the Arduino core is available I expect to post several sketches on Github demonstrating Grasshopper use including how to access the low power modes (which is straightforward). Maybe by the end of this month…
This is one of the projects I am planning to use it for:
Its a 23 mm x 23 mm sensor tile with BME280, BMA280, and VEML6040 with 16 MByte SPI flash for logging, LiPo battery charger, programmable via USB using the Arduino IDE.
The sleep current is < 10 uA and daily usage at 0.1 Hz data logging rate is likely to be < 10 mA per day, still TBD. But the idea is to use it as an ultra-low-power environmental data logger and long-range edge node, etc.
It’s just a prototype for testing but I like the form factor and there is still room for more (low-power) sensors.