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TemperatureHumidityEPD

kevinkessler·TemperatureHumidityEPD-PCB

TemperatureHumidityEPD PCB layout, top view — open source STM32 board by kevinkessler

About the TemperatureHumidityEPD PCB

TemperatureHumidityEPD is an open source STM32 PCB design by kevinkessler, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 48 × 33 mm, with 22 components from 14 distinct parts.

Its main chip is the STM32L031Fx, from the STM32 family. Other key parts include the SI7021. By type, the board carries 5 capacitors, 5 resistors, 3 connectors, 2 ICs, 1 transistor and 1 battery holder.

It belongs with the sensors and displays & leds designs in this gallery.

From the project

PCB Kicad Files for my Temperature/Humidity EPaper Display

Temperature/Humidity ePaper Display KiCad Files ===============================================

In order to investigate the low power modes and techniques for an STM32L0 class microprocessor, I've build a temperature and humidity display using an STM32L031F6 uC, an SI7021 I2C temperature/humidity sensor, and a Waveshare 1.54 inch black, white, and red ePaperDisplay. Starting with a straight-forward, non-optimized version of the software, this project will investigate and document the various power savings techniques that can be applied to the system, in order to get the power usage of the…

Main components on the TemperatureHumidityEPD

STM32L031FxSI7021

TemperatureHumidityEPD bill of materials (BOM)

22 components, 14 distinct parts.

QtyPartRefs
1
STM32L031Fx
U1
1
SI7021
U2
1
IRLML6344
Q1
1
Conn_01x08
J1
1
Conn_01x05
J2
1
Conn_01x02
J3
1
Battery_Cell
BT1
4
MOUNTHOLE
MP1, MP2, MP3, MP4
1
600Ohm
L1
4
100n
C1, C2, C3, C5
1
10u
C4
3
10K
R1, R2, R3
1
100R
R4
1
100K
R5

TemperatureHumidityEPD design files

The KiCad project lives in the kevinkessler/TemperatureHumidityEPD-PCB repository on GitHub; these links point at the commit this page was built from.

TemperatureHumidityEPD: common questions

What microcontroller does the TemperatureHumidityEPD use?

The TemperatureHumidityEPD is built around the STM32L031Fx, from the STM32 family.

How big is the TemperatureHumidityEPD PCB?

The TemperatureHumidityEPD measures 48 × 33 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the TemperatureHumidityEPD?

22 components, from 14 distinct parts. The full bill of materials is listed on this page.

Where can I download the TemperatureHumidityEPD design files?

From the kevinkessler/TemperatureHumidityEPD-PCB repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the TemperatureHumidityEPD design in my own project?

Yes, under the terms of its GPL-3.0 license, which kevinkessler chose for the repository.

Can I test firmware for the TemperatureHumidityEPD without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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