The SOTB Battery-less Soil Monitor is a solution intended for use in extremely low-power sensing applications. It harvests ambient energy (e.g. solar or wind) and gathers temperature and humidity data, sending the results over the long-range LoRa® radio network.


  • Minimal power draw with little maintenance:
    • Sleep state with a wakeup timer, drawing <1 mA when operating at 1.8V
    • Can operate without a battery by charging/discharging a capacitor, and drastically reduce the need for in-field maintenance
  • Long-range (up to 30 miles in rural areas) transmission of data is suited for outdoor usage and agricultural applications


  • Agriculture
  • IoT


Title language Type Format File Size Date
star HWI SOTB Battery-less Soil Monitor for Renesas RE Partner Solution Product Brief PDF 416 KB
HWI RE01 Sensor Board PoC for Renesas RE Partner Solution Product Brief PDF 569 KB

printNews & Additional Resources

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Halleck-Willard, Inc External Link Feb 17, 2021