Dramco
LoRa
Energy
Calculator

Inputs

::

Results

worst case best case
Air time ms ms
# packets
TTL

Assumptions

Several assumptions were made for this calculator. These are based on real-world measurements.

General

  • Processing: 15 mW for 5 ms (conform reading a sensor value) per period soon adjustable
  • Sleep consumption: 10uW soon adjustable

Worst case results

  • SF12
  • BW125 kHz
  • TP 14 dBm
  • ACK in 2nd RX window

Best case results

  • SF7
  • BW125 kHz
  • TP 2dBm
  • ACK in 1st RX window

What is not considered

  • Aging of battery
  • Collisions
  • Retransmissions
  • ADR
  • No restriction on (cfr. LoRaWan specification):
    • Payload size
    • Duty cycle