A real ultra-low power LoRa development board based on the popular Atmel AVR ATMega328p - Arduino compatible. Thanks to the highly efficient MCP16251 Step-up Switching regulator, this board can be powered with little as 0.9V. In other words, you can run it on a single Alkaline Cell until the battery is totally dry.
Alternatively, you could connect a 5V power supply, like a USB charger, and take advantage of the ultra-low quiescent current MCP1700 LDO regulator, capable of 250mA, providing more flexibility while developing or running hunger projects. The board also counts with a smart voltage monitor, which will automatically switch from a power supply to the battery in case of power-loss or vice-versa. Alternatively, you could use a Li-Po cell, and the board will decide to use the LDO or the Step-up regulator based on the cell voltage to maximise the running time on a single charge.
As standard, this board comes with an RFM95/96 LoRa Radio (Semtech SX1276), giving you long-range wireless connectivity out of the box! The LoRa modulation can be easily used in replacement of an FSK radio to build a point-to-point, point-to-multipoint or just connect to a LoRaWAN network, like The Things Network (TTN).
Finally, a W25X40CL 4MBit SPI Flash is attached to the PCB, giving you plenty of storage and option for remote firmware upgrade over-the-air. You get all this running on a board that consumes around 6µA in sleep mode when powered by a 3V source, like two Alkaline cells.
The Whisper Node board ships with all headers (un-soldered) and external 1.5dBi (± 0.7 dBi) PCB antenna with a u.FL connector, matching the radio frequency. The small PCB antenna provides an excellent balance between performance and size.
Moreover, the board can be easily upgraded to fit an SMA antenna connector, a temperature compensated real-time clock, a CR2032 battery holder or a high-capacity LDO, making the board an ideal as a low-power remote node or as a sturdy base station.
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Great hardware and service
The hardware is very well designed and is super efficient with regard to power consumption, which makes it extremely convenient for use in demanding projects in these aspects. Additionally, the manufacturer is always present at the time of evacuating any doubt or query. Highly recommended!
Great product for connecting to The Things Network
I've brought several of these now. They work great with The Things Network (TTN). The combination of Arduino compatible processor, battery options and on-board storage make it an ideal platform for developing TTN projects.
All in one
Found this board to be an optimal platform for many projects. It's small and all self-contained, just need to plug sensors. Great built quality!