Using a 1.54 three-color ink screen for temperature and humidity display, coupled with the support of the 32L0 series, the overall energy consumption is minimized

The design concept is stm32L0 series + ink screen (no need for electricity except for refreshing) + SHT20 + button battery/mini lithium battery. The overall size is as small as 4cm*4cm, and the 3D printed shell is no larger than 5*5 in
the final version.

• 1.54 three-color ink screen
• STM32L051K8 master control

The power consumption target is 200mah, which can be used for 2-3 months.

• Phase 1 Verification Circuit Phase (Complete)
• The second stage is to reduce the size of the PCB and beautify it (completed)
• The third stage of UI design + shell design (in progress)

Agent: low battery detection and display

Verification version V3: Expression changes according to temperature and humidity:

Verification version V1+V2:

Verification version V3: (temperature and humidity display)