ESP32 as a low power sensor

Notes on using an ESP32 as a low power sensor:

Battery:

• I have some 18650’s already
• Battery holder is 76 x 21 x 19
• LiPo drop by about 1 % per month
• 3000 mAh at 1 %/month is ~40 uA/h

ESP32:

• FireBeetle 2 ESP32-C6 is apparently 20 uA in deep sleep
• 60 x 25.4 x 7.3 mm
• Takes up to a 6 V panel

Panel:

• Could use a solar panel to top up the power
• A 5 V 65 mA panel is 68 x 36 mm
• Ideally the LiPo should stay cool, but the panel should get sun…

Box:

• Maximum of dimensions is 76 x 36 x 19 mm
• Purecrea have a small 77 x 52 x 28 mm inside dimension box