Low Power

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Arduino Based, atmega328P

Test Result of Loraduino

Hardware Test

  • ~ for roughly value
  • Test A
Condition - - - - - Result
  • Default
  • Mounted lora module
  • 2.5Dbi antenna (current sell is 2Dbi)
  • Flashed with receive mode sketch
- - - ~19.29mA
- remove leds - - ~16.5 mA
- remove leds remove flash - - ~ 15.77mA
- remove leds remove flash remove 2* 10K battery sensing resistors - ~15.48mA
- remove leds remove flash remove 2* 10K battery sensing resistors remove backside MCP73831 ~15.45mA
- remove leds remove flash remove 2* 10K battery sensing resistors remove backside MCP73831 switch to use SPX3819 ~15.55mA
  • Test B
Condition + + Result
without lora module - - -
flashed bootloader (no sketch yet) power led on ~6.11mA
flashed bootloader sketch - default rf95_reliable_datagram_client power + D7 led on ~7.84mA
flashed bootloader sketch - default rf95_reliable_datagram_client power + D7 led remove ~4.95mA
  • Test of transmitter and receiver

transmitter - default 13dBm

  • normal standby - 9.4 ~ 9.7 ma
  • transcending data - 22ma

receive - default 13dBm

  • normal standby - 19ma
  • transcending data - 54ma

Sorting things

  • Active Halt
  • Deep Sleep
  • Standby
  • Working mode

Factors

  • Battery self power drain
  • Battery static power drain
  • Battery quality
  • Battery threshold voltage