PrincessPiTracker/NOTES-SCRATCH.md

Notes

• using esp-idf v5.5.1 for testin

Wireshark

• filter for finding these adverts by mac is btle.advertising_address == xx:xx:xx:xx:xx || btle.scanning_address == xx:xx:xx:xx:xx
• filter for narrowing to without mac is (btcommon.eir_ad.entry.type == 0x01) && (btle.advertising_header == 0x2506)

Voltage reading

1. 2x 200k resistor
   1. bat+ -> adc0
   2. bat- -> adc0
2. adc oneshot read esp-idf
3. battery usage Xiao C6
4. battery usage Xiao C3

• max usable interval 4000ms seems like
  • 2000ms seems moar stable? idk

Scratch

test protocol

rebuildfull erase flash set setgings flash plug into usb-c meter measure power usage over 10 minutes (600 seconds) export to excel name like: (progress markers: b built, f flashed, m measuring, l logged, d done) bfmld burst-60s-200ms-10ms-3b-nousb-ant-109f09e- bfmld normal-10.230s-10ms-nousb-ant-109f09e- bfmld normal-10.230s-10ms-nousb-noant-109f09e- bfm burst-60s-200ms-10ms-3b-nousb-noant-109f09e- next burst-120s-40ms-0ms-4b-nousb-noant-109f09e- get values with (EXCEL paste into cell D1)

avg V	avg A	avg W	avg mW
=AVERAGE(B1:B1000)	=AVERAGE(C1:C1000)	=D2*E2	=F2*1000