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 an 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 maximize the running time on a single charge.
As standard, this board comes with a RFM69W Sub-GHz RF module (Semtech SX1231), giving you wireless connectivity out of the box! The RFM69 is a very popular FSK/OOK radio, proven to offer excellent cost/benefit for any project requiring RF communication at low-power.
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 is shipped 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.
Additionally the board can be easily upgraded to fit a SMA antenna connector, a temperature compensated real-time clock, a CR2032 battery holder or a high-capacity LDO, making the board a ideal as a low-power remote node or as a powerful base station.
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Need a "mega" version please
Great range, excellent low-power features but would be great to get this board with more pins. Maybe using a bigger MCU would be better if the board size and power consumption can be preserved.
Full of features
From small details like the built-in voltage monitors to the multiple power supplies, including the high-quality assemble and components used. Great documentation and pos-sales support as well.
Great little board
Very happy with the board, it's a high quality product. I can do development, prototyping and even use on my final products. Thanks to the size and features I was able to use this board for a few complex projects, saving me the trouble of building my own custom PCBs.