4 layers75 × 56.4 mm
Esp32-c6-wroom1 board
pushtiujeniya/esp32-c6-environmental-logger
This repository contains an Environmental Sensor Station and Data Logger powered by the ESP32-C6-WROOM-1 microcontroller.
59 parts4
4 layers60 × 60 mm
Ummon
JonaWe/ummonummon (from German Umgebungsmonitor, "environment monitor") is an ESP32-C6 based environmental sensor board with USB-C power.
- Size
- 60 × 60 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 95
- Nets
- 75
- Pads
- 312
- Tracks, vias
- 788, 121
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 9 Jul 2026
- Updated
- 31 Aug 2026
Overview
Ummon is an open-source printed circuit board by JonaWe, from the JonaWe/ummon repository on GitHub. It is a 4-layer board of 60 × 60 mm with 95 parts on 75 nets, routed with 788 tracks and 121 vias.
It is built around the ESP32-C6-WROOM-1-N8, SGP41-D-R4 and SHT41-AD1B-R2, with the CY43-10UH, AMS1117-3.3 and SCD41-D-R2 among its other parts. Its parts include 32 capacitors, 19 resistors, 8 diodes, 6 ICs and 6 connectors. It belongs with the ESP32 and RISC-V boards of this library.
Main components
12
ESP32-C6-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -99.2dBm 2.4GHz 20.5dBm 382mA 3V~3.6V 78mA ESP32-C6 On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi ModulesSGP41-D-R4
DFN-6(2.4x2.4)DFN-6(2.4x2.4) VOC Sensors ROHSSensirionVOC Sensors
SHT41-AD1B-R2
DFN-4(1.5x1.5)-40℃~+125℃ 0%RH~100%RH 1.08V~3.6V 16bit 400nA Factory calibration、Built-in heater I2C ±0.2℃ ±1.8%RH DFN-4(1.5x1.5) Temperature and Humidity Sensor ROHSSensirionHumidity, Moisture Sensors
CY43-10UH
SMD,4.5x4mm10uH 150mΩ 1A Drum-core inductor ±20% SMD,4.5x4mm Power Inductors ROHSSHOU HANInductors (SMD)
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SCD41-D-R2
LGA-20UncategorisedSensirion
LMBR0530T1G
SOD-123-65℃~+125℃ 1 Independent 20uA 30V 450mV 5.5A 500mA SOD-123 Schottky Diodes ROHSLeshan Radio (LRC)Schottky Diodes
KT-0805G
0805-40℃~+85℃ 100mW 120° 2.6V~3.1V 430mcd 513nm~528nm 525nm 5mA Discrete Diode Emerald Green Water Clear 0805 LED Indication - Discrete ROHSHubei KENTO ElecLED Indication - Discrete
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
1206L100/24NR
1206-40℃~+85℃ 1.2W 1.4mm 1.8A 1.9mm 1A 24V 3.6mm 300ms 300mΩ 40A 50mΩ 1206 Resettable Fuses ROHSLUTEResettable FusesBSS138LT1G
SOT-23-55℃~+150℃ 1 N-channel 200mA 225mW 5.6Ω@2.75V 500mV 50V 50pF 5pF SOT-23 MOSFETs ROHSonsemiMOSFETs
AFC11-S24ICC-00
SMD,P=0.5mm0.3mm 0.5mm 24P 4.4mm Copper alloy Single-side Contact/Vertical Slide Lock Surface Mount,Vertical Tin SMD,P=0.5mm FFC, FPC (Flat Flexible) Connector Assemblies ROHSJSFFC, FPC (Flat Flexible) Connector Assemblies
README
README.mdummon
ummon (from German Umgebungsmonitor, "environment monitor") is an ESP32-C6 based environmental sensor board with USB-C power. It reads several environmental sensors over I²C and drives an e-paper display (a 7.5" Waveshare panel in this build). The board is a custom 4-layer PCB designed in KiCad, powered from USB-C with on-board 3.3 V regulation.
Features
- MCU: ESP32-C6-WROOM-1 (Wi-Fi 6, Bluetooth LE, Zigbee/Thread)
- Sensors over I²C:
- SHT41 for temperature and humidity
- SCD41 for CO₂
- SGP41 for VOC / air quality
- Display: e-paper via an on-board boost converter for the panel supply rails (7.5" Waveshare V2 used here)
- Power: USB-C input, AMS1117 3.3 V LDO, TVS/ESD protection on VBUS and the USB data lines
Repository structure
├── hardware/ KiCad project (schematic, PCB, footprints, datasheets)
├── firmware/ ESP32-C6 firmware (planned)
└── mechanical/ 3D-printed enclosure (planned)Hardware
The PCB uses a 4-layer stackup:
| Layer | Purpose |
|---|---|
| Top | Signals + components |
| Inner 1 | Continuous GND plane |
| Inner 2 | 3.3 V plane |
| Bottom | Signals |
Status
- Schematic
- PCB layout
- Firmware
- Enclosure
Parts
95| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 100nF | Capacitor_SMD:C_0805_2012Metric | C1, C5, C6, C7, C8, C10, C11, C12, C13, C15, C16, C19, C20, C21 |
| 5 | 1μF/25V | Capacitor_SMD:C_0805_2012Metric | C24, C28, C30, C34, C36 |
| 4 | 10kΩ | Resistor_SMD:R_0805_2012Metric | R4, R5, R8, R9 |
| 3 | 1µF | Capacitor_SMD:C_0805_2012Metric | C2, C3, C40 |
| 3 | 1Ω | Resistor_SMD:R_0805_2012Metric | R11, R13, R16 |
| 3 | 22µF | Capacitor_SMD:C_1206_3216Metric | C14, C17, C18 |
| 3 | 4.7kΩ | Resistor_SMD:R_0805_2012Metric | R6, R7, R18 |
| 3 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3, J4, J5 |
| 3 | MBR0530 | parts:SOD-123_L2.8-W1.8-LS3.7-RD | D2, D3, D4 |
| 3 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad | H2, H3, H4 |
| 2 | 0805G | parts:LED0805-R-RD | LED2, LED3 |
| 2 | 100kΩ | Resistor_SMD:R_0805_2012Metric | R17, R19 |
| 2 | 10µF | Capacitor_SMD:C_0805_2012Metric | C4, C9 |
| 2 | 1μF/50V | Capacitor_SMD:C_0805_2012Metric | C32, C38 |
| 2 | 220Ω | Resistor_SMD:R_0805_2012Metric | R12, R15 |
| 2 | 5.1kΩ | Resistor_SMD:R_0805_2012Metric | R2, R3 |
| 2 | AO3401A | parts:SOT-23_L2.9-W1.3-P1.90-LS2.4-BR | Q2, Q3 |
| 1 | 10μH | parts:IND-SMD_L4.5-W4.0 | U6 |
| 1 | 1A/24V | parts:F1206 | F1 |
| 1 | 1kΩ | Resistor_SMD:R_0805_2012Metric | R14 |
| 1 | 1μF/10V | Capacitor_SMD:C_0805_2012Metric | C27 |
| 1 | 2.2Ω | Resistor_SMD:R_0805_2012Metric | R10 |
| 1 | 3V3 | TestPoint:TestPoint_Pad_D1.0mm | TP2 |
| 1 | 4.7Ω | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 4.7μF | Capacitor_SMD:C_1206_3216Metric | C22 |
| 1 | 4.7μF/50V | Capacitor_SMD:C_1206_3216Metric | C26 |
| 1 | 5V | TestPoint:TestPoint_Pad_D1.0mm | TP8 |
| 1 | AMS1117-3.3 | parts:SOT-223-3_L6.5-W3.4-P2.30-LS7.0-BR | U5 |
| 1 | BSS138LT1G | parts:SOT-23-3_L2.9-W1.6-P1.90-LS2.8-BR | Q1 |
| 1 | Conn_01x05_Pin | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2 |
| 1 | Conn_01x09_Pin | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical | J6 |
| 1 | Display | parts:FPC-SMD_AFC11-S24ICC-00 | P1 |
| 1 | EN | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | EPD_3V3 | TestPoint:TestPoint_Pad_D1.0mm | TP11 |
| 1 | ESP32-C6-WROOM-1-N8 | PCM_Espressif:ESP32-C6-WROOM-1 | U1 |
| 1 | Flash | parts:SW-SMD_L3.9-W3.0-P4.45 | SW2 |
| 1 | GND | TestPoint:TestPoint_Pad_D1.0mm | TP9 |
| 1 | GPIO9 | TestPoint:TestPoint_Pad_D1.0mm | TP10 |
| 1 | KT-0603R | parts:LED-SMD_L1.6-W0.8-R-RD | LED1 |
| 1 | MINI MSK12CO2 | parts:SW-SMD_MSK12CO2 | SW4 |
| 1 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1 |
| 1 | PCP | TestPoint:TestPoint_Pad_D1.0mm | TP4 |
| 1 | PSW | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
| 1 | RESE | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
| 1 | Reboot | parts:SW-SMD_L3.9-W3.0-P4.45 | SW1 |
| 1 | SCD41 | parts:LGA-20_L10.1-W10.1-P1.25-TL | U2 |
| 1 | SGP41 | parts:DFN-6_L2.4-W2.4-P0.80-TL-EP | U3 |
| 1 | SHT41 | parts:DFN-4_L1.5-W1.5-SHT41-AD1B-R2 | U4 |
| 1 | SMF5.0A | parts:SOD-123F_L2.8-W1.8-LS3.7-RD | D5 |
| 1 | TYPE-C 16PIN 2MD | parts:USB-C-SMD_TYPE-C-16PIN-2MD-073 | USB1 |
| 1 | Test Button | parts:SW-SMD_L3.9-W3.0-P4.45 | SW3 |
| 1 | USBLC6-2SC6 | parts:SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL | D6 |
| 1 | VGH | TestPoint:TestPoint_Pad_D1.0mm | TP7 |
| 1 | VGL | TestPoint:TestPoint_Pad_D1.0mm | TP6 |
Questions
How big is the Ummon PCB?
It measures 60 × 60 mm and has 4 copper layers, 1.61 mm thick.
What parts does the Ummon use?
95 parts, built around the ESP32-C6-WROOM-1-N8, SGP41-D-R4, SHT41-AD1B-R2 and CY43-10UH. 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 Ummon KiCad files?
From the JonaWe/ummon repository on GitHub, at the commit this page was made from: the board is hardware/ummon.kicad_pcb and its schematic hardware/ummon.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ummon design in my own project?
Its repository states no licence, so its author keeps all rights: ask JonaWe before reusing the design.
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