Schematic for ESP32 Enviro Monitor: ESP32 Environmental Monitor...

ESP32 Environmental Monitor PCB Design

flux

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Autopilot

Work completed

Detailed goal & project description updated
System architecture flowchart added
Major ICs placed: ESP32-WROOM-32E (U1), TP4056 (U2), CP2102N-A02-GQFN24 (U4), BME280 (U5), SGP30-2.5k (U6)
Diode-OR path corrected (D1, D2 feeding U3:VIN)
USB-C CC pull-down resistors R7, R8 added
TP4056 PROG resistor (R9) set for 500 mA charge
Decoupling capacitors added per datasheets (C5, C6, C9, C10, C11)
Auto-programming network verified (Q1/R5, Q2/R6, DTR/RTS)
I²C pull-ups (R1, R2) and sensor nets wired (U5, U6)
Test points for 3V3, GND, EN, IO0, TXD0, RXD0 placed and connected
Footprints assigned and board size set to 50 mm × 35 mm

Remaining tasks

Add ESD protector USBLC6-2SC6 (U7)
Select a standard two-layer stackup and configure ground fill

Success criteria review

✅ Power path fixed
✅ CC resistors & PROG resistor installed
✅ Decoupling capacitors per datasheets
✅ Test points & clear net labels
✅ PCB set to 50 mm × 35 mm, ready for routing
⚠️ Missing ESD protection and stackup configuration

Next step Configure the PCB stackup and ground fill, then proceed to component placement and auto-routing on the board layout.

42 days

Needs more info.

Show Plan

J2 2 - U2 BAT

U3 GND - GND GND

R5 P2 - Q1 B

U2 PROG - R9 P1

U3 VOUT - U1 3V3

U1 IO21 - U6 SDA

Q1 C - U1 EN

U1 IO21 - U6 SDA

J1 GND1 - U2 GND

U1 IO22 - U6 SCL

Q1 C - U1 EN

U3 GND - GND GND

U4 RXD - U1 RXD0

U1 IO21 - U6 SDA

Resistance

5.1kΩ

Q2 C - U1 IO0

J1 CC1 - R7 P1

U4 TXD - U1 TXD0

U3 VOUT - U1 3V3

J2 2 - U2 BAT

U3 VOUT - U1 3V3

Q1 C - U1 EN

U3 GND - GND GND

U1 IO21 - U6 SDA

U1 IO22 - U6 SCL

J2 2 - U2 BAT

U1 IO22 - U6 SCL

D2 2 - U3 VIN

U4 RTS - R6 P1

Q2 C - U1 IO0

GND

U4 RTS - R6 P1

U3 GND - GND GND

Q2 C - U1 IO0

J1 CC2 - R8 P1

U1 IO22 - U6 SCL

J2 2 - U2 BAT

U1 IO22 - U6 SCL

Capacitance

1uF

U3 GND - GND GND

Capacitance

1uF

U4 DTR - R5 P1

Resistance

5.1kΩ

U3 GND - GND GND

Reviews

Electrical Rule Checks

Missing Footprints

Reports parts that have no footprint.

Design Rule Checks

Overlapping Copper • 6

Des	Net	Des	Net
Q2:E	GND	TP6:-	None
R9:P2	GND	J3:3	SDA
U1:IO0	IO0	TP1:-	None
R9:P1	PROG	J3:2	GND
Q2:B	RTS	TP6:-	None
D1:2	VIN	J3:1	3V3

Invalid Layer

Reports nodes that are assigned to a layer that doesn't exist in the layout stackup.

Component Overrides

Reports components that have been modified using the "!important" flag.

Airwires • 53

	Designators	Net
	J3:1, C11:P1	3V3
	J3:1, R2:P2	3V3
	J3:1, R3:P1	3V3
	Q1:C, R4:P2	3V3
	R1:P2, R4:P2	3V3
	R2:P2, R4:P2	3V3
	R3:P2, R3:P1	3V3
	U1:3V3, U1:EN	3V3
	U1:EN, C11:P1	3V3
	U3:VOUT, R2:P2	3V3
	C8:P1, C7:P1	BAT
	D1:1, C8:P1	BAT
	J1:VBUS1, J1:VBUS4	BAT
	J1:VBUS2, C8:P1	BAT
	J1:VBUS2, J1:VBUS3	BAT
	J1:VBUS4, J1:VBUS3	BAT
	J2:2, D2:1	BAT
	U2:BAT, D2:1	BAT
	U2:VCC, C7:P1	BAT
	U2:VCC, U2:BAT	BAT
	J1:CC1, R7:P1	CC1
	J1:CC2, R8:P1	CC2
	J1:DA-, J1:DB-	D-
	J1:DA-, U4:D-	D-
	J1:DA+, J1:DB+	D+
	J1:DB+, U4:D+	D+
	R5:P1, U4:DTR	DTR
	C6:P2, C5:P2	GND
	C6:P2, C7:P2	GND
	C8:P2, C7:P2	GND
	J1:GND1, U2:GND	GND
	Q1:E, Q2:E	GND
	R9:P2, J3:2	GND
	Via-3-1:Via-3-1, Q1:E	GND
	Q2:C, R4:P1	IO0
	U1:IO0, Q2:C	IO0
	R9:P1, U2:PROG	PROG
	R5:P2, Q1:B	Q1_BASE
	Q2:B, R6:P1	RTS
	U4:RTS, R6:P1	RTS
	U1:RXD0, U4:RXD	RXD0
	J3:4, R2:P1	SCL
	J3:4, U6:SCL	SCL
	U1:IO22, J3:4	SCL
	U6:SCL, U6:SCL	SCL
	J3:3, R1:P1	SDA
	J3:3, U6:SDA	SDA
	U1:IO21, J3:3	SDA
	U1:TXD0, U4:TXD	TXD0
	D1:2, U3:VIN	VIN
	U3:VIN, D2:2	VIN
	C6:P1, U4:VIO	VIO
	C5:P1, U4:VREGIN	VREGIN

Deprecated Rules

Reports nodes that are using rules that are not supported anymore.

Layers with Multiple Fills • 1

	Layer	Net
	All	GND, GND

Floating Copper

Detect any via, trace or copper fill island that is not connected to any net.

Protected Intrusions

Reports intrusions from objects of other nets into polygons or fills that have the Protected layout rule applied.

Manufacturing

Manufacturer Part Number • 12

	Designator	MPN
	C5	None
	C6	None
	C9	None
	C10	None
	C11	None
	Hole1	None
	Hole2	None
	Hole3	None
	Hole4	None
	R7	None
	R8	None
	R9	None

Parts Available

Beta

Checks that all parts have a part number and are available from distributors.

System Checks

Auto-Layout

Beta

Reports issues with Auto-Layout if Flux cannot route something or must ignore a configuration.

Passive Components

Resistor Power Rating

Beta

Checks that the power traveling across a given resistor is under its rating with 50% headroom.

Learn more

Pull Up/Pull Down Presence

Beta

Checks that IC pins that require pull up or pull down resistors have them.

Learn more

Capacitor Voltage Rating

Beta

Checks that capacitors have appropriate voltage ratings to prevent overheating and ensure reliable circuit operation.

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
20.5M
Net Portal
Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
jharwinbarrozo
43.0M
Power Net Portal
Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
jharwinbarrozo
11.4M
Generic Resistor
A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Capacitor
A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
jharwinbarrozo
1.5M
Generic Inductor
A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
jharwinbarrozo
15.1k
Terminal
An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
natarius
RMCF0805JT47K0
47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
jharwinbarrozo
1.2M
875105359001
10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
jharwinbarrozo
1.2M
CTL1206FYW1T
Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
jharwinbarrozo
1.1M

Inspect

ESP32 Enviro Monitor

Controls

Properties

Board Size

50 mm × 35 mm

Role

Power Management

Domain

Consumer Electronics

description

ESP32 Environmental Monitor PCB with USB‑C, LiPo Charging, and I2C Sensors (50 mm × 35 mm, 2‑Layer)

Power Requirements

USB

Connectivity

WiFi

Part Type

Power Management

Role Details

Complete ESP32 enviro monitor with USB-C, LiPo charging, and sensors

Manufacturing Quantity Target

Operating Voltage

3.3 V

Software

Arduino

Availability & Pricing

Distributor		Qty 1
	Arrow	$10.28–$14.42
	Digi-Key	$25.48–$28.99
	LCSC	$18.45–$19.09
	Mouser	$11.12
	TME	$1.26
	Verical	$10.61–$98.38

Assets

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