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2 layers50 × 45.3 mmTempic HW, the printed circuit board in 3D

Small solarpowered ESP32 based indoor/outdoor wifi weather station.

Size
50 × 45.3 mm
Copper layers
2
Thickness
1 mm
Parts
61
Nets
60
Pads
263
Tracks, vias
425, 131
Pours
3
Routed
Yes
KiCad
KiCad 10.0 (file 20260206)
Created
14 Sep 2026
Updated
4 Oct 2026

Overview

Tempic HW is an open-source printed circuit board by jernej13, from the jernej13/Tempic repository on GitHub, published under the MIT licence. It is a 2-layer board of 50 × 45.3 mm with 61 parts on 60 nets, routed with 425 tracks and 131 vias.

It is built around the BME688, TPS631000DRL and BQ25504RGT, with the ESP32-C6-MINI-1, TPS62A01PDDC and ESDZV5-1BV2 among its other parts. Its parts include 20 resistors, 19 capacitors, 6 ICs, 4 connectors and 3 diodes. It belongs with the radio and wireless and home automation and IoT boards and the ESP32 and RISC-V boards of this library.

Main components

6

README

README.md

Tempic

Small 50mm x 50mm solar powered ESP32c6 based indoor/outdoor WiFi/Zigbee sensor node.

Features

  • Onboard ESP32 C6 mini with

    • WiFi 6 (2.4 GHz)
    • Zigbee 3
    • Bluetooth 5.3
  • BME688

    • Temperature
    • Humidity
    • Pressure
    • CO2
  • BMV080 (for outdoor use)

    • P.M. 1.0
    • P.M. 2.5
    • P.M. 10
  • Small 5x5cm solar panel

  • Small 5x5cm LiPo battery

Goal is easy Home Assistant integration with unlimited battery life and cable-less deployment.

Roadmap

  • Hardware 1.0
    • Find suitable ICs
    • Schematics 1.0
    • Draw PCB 1.0
    • Order prototype
    • Assemble the PCB
    • Test PCB
  • Hardware 1.1
    • Fix current PCB mistakes
    • Order PCB
    • Assemble and test PCB
  • Firmware
    • Basic test and demo of sensors
    • Battery life optimization
    • Add Wifi
    • Setup connection to Home Assistant
    • Add Zigbee
    • (far) Add BLE peer to peer communication for bigger meshes
  • Case
    • 3d design case
    • 3d print case
  • Home assistant
    • Figure out what is the best way to make it work (do not know if any custom plugins are necessary)

Schematics

View schematics in PDF format.

Developed in KiCad.

Parts

61
QtyValueFootprintReferences
10100nCapacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolderC2, C6, C12, C13, C14, C15, C16, C17, C18, C19
422uCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC8, C9, C10, C11
44.7uCapacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolderC1, C3, C5, C7
32.8MResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR7, R19, R20
21uInductor_SMD:L_1008_2520Metric_Pad1.43x2.20mm_HandSolderL2, L3
24.42MResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR2, R5
25.1kResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR13, R14
25.49MResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR1, R4
291kResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR16, R18
2Conn_01x08_PinConnector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_VerticalJ2, J3
2ESDZV5-1BV2Diode_SMD:Nexperia_DSN0603-2_0.6x0.3mm_P0.4mmD2, D3
1
110MResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR8
110nCapacitor_SMD:C_0402_1005Metric_Pad0.74x0.62mm_HandSolderC4
1217175-0001local:MOLEX_2169900001P1
122uInductor_SMD:L_0805_2012Metric_Pad1.05x1.20mm_HandSolderL1
1287kResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR15
12kResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR6
1316kResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR10
132.7680kCrystal:Crystal_SMD_3215-2Pin_3.2x1.5mmY1
14.02MResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR12
1470Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR3
15.62MResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR11
1511kResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR17
17.2MResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR9
1BME688local:BME688U6
1BMV080local:CON_5035661302_MOLJ1
1BQ25504Package_DFN_QFN:VQFN-16-1EP_3x3mm_P0.5mm_EP1.68x1.68mmU2
1ESP32-C6-MINI-1RF_Module:ESP32-C6-MINI-1U5
1LEDLED_SMD:LED_0402_1005Metric_Pad0.77x0.64mm_HandSolderD1
1LiPoConnector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_VerticalBT1
1MCP73831-2-MCPackage_DFN_QFN:DFN-8-1EP_3x2mm_P0.5mm_EP1.7x1.4mmU1
1Solar_CellConnector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_VerticalSC1
1TPS62A01PDDCPackage_TO_SOT_SMD:SOT-23-6U3
1TPS631000Package_TO_SOT_SMD:SOT-583-8U4

The 59 most common of 61 parts.

Questions

How big is the Tempic HW PCB?

It measures 50 × 45.3 mm and has 2 copper layers, 1 mm thick.

What parts does the Tempic HW use?

61 parts, built around the BME688, TPS631000DRL, BQ25504RGT and ESP32-C6-MINI-1. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Tempic HW KiCad files?

From the jernej13/Tempic repository on GitHub, at the commit this page was made from: the board is Tempic-HW/Tempic-HW.kicad_pcb and its schematic Tempic-HW/Tempic-HW.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Tempic HW design in my own project?

Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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