The RPi-Basic Spring adapter allows for easy connectivity between a Raspberry PI and any of the LooUQ Circuit River Stream devices, including our LTEm1 Stream modem. The adapter has a voltage regulator to supply the modem with power derived from the Raspberry PI's 5-volt supply and signal connectivity. For applications where the USB port is utilized (Linux) as the communications path between the R-PI and the modem, the IRQ and SPI-CS traces can be easily cut to prevent unexpected interactions.


The RPi-Basis form-factor matching for the Raspberry PI Foundation HAT specification, but since we have not implemented the GPIO automatic mapping we don't call it a HAT. It is available with either stacking or non-stacking 40-pin I/O header (2nd photo, with LTEm1 attached, shows stacking header). 


Prototype pictured here. Lab testing has been successful, now undergoing field testing with customers. Available in late summer 2019.


















Signal NamePhysical PinAlias
SPI-CS24SPI0/CS0 (GPIO8)
SPI-MISO
21SPI0 (GPIO9)
SPI-MOSI19SPI0 (GPIO10)
SPI-CLK
23SPI0 (GPIO11)
IRQ15GPIO22
PwrKey18GPIO24
Status33GPIO13
Reset31GPIO6
Sleep29GPIO5
Connected32GPIO12
NewEvent37GPIO26


LooUQ Circuit River Springs are open-hardware and all supporting software/drivers are licensed as open-source. Please visit our GitHub to see our Eagle-CAD design files and our collection of open-source software repositories.


https://github.com/loouq