Schematic for [Example] ESP32 Reference Design: ESP32 Dual-Band...

u-blox GPS Integration

0:00

Autopilot

I completed these steps from the plan:

• Updated the project description to include the high-accuracy GNSS integration goals and hashtags.
• Added the “System Architecture” property with the mermaid flowchart.
• Placed the u-blox ZED-F9P module (U8) and the BS-11-B2CA001 backup/RTC battery connector (J16).
• Added two generic decoupling capacitors (C9, C10) on the GNSS VDD pins.
• Added an ESD protection diode (D2) on the antenna line.
• Added a u.FL antenna connector (J17).

Remaining tasks:

• Add the multi-pin RTCM header connector.
• Wire up all nets: GNSS VDD/GND to +3V3/GND, RTC battery pin, UART TX/RX, optional I2C SDA/SCL, 1PPS output, and antenna path through ESD.
• Assign clear net labels (e.g. GNSS_VDD, GNSS_TX, GNSS_1PPS).
• Add the “RF Keep-Out Notes” property with recommended ground-plane clearance.

Success criteria review:

• GNSS module and decoupling added: ✅ (placement only; nets still to connect)
• Antenna interface with ESD added: ✅ (RF keep-out notes pending)
• UART/I2C/1PPS connections to ESP32: ⏳ not yet implemented
• Documentation and net labeling updated: ⏳ partially done (architecture added; net labels still missing)

Next, I recommend completing the Connectivity phase: connect all GNSS nets in the schematic (power, battery, UART, I2C, 1PPS, antenna), assign net names, and then add the RF keep-out notes.

46 days

Ready.

Resistance

10k Ω

SDA

AIN0

ESP_IO18

ESP_IO27

SCL

ESP_IO32

ESP_CMD

ESP_IO33

SDA

ESP_IO35

Resistance

5.1K Ω

SDA

ESP_IO23

USB_D-

SCL

ESP_IO25

ESP_SD0

ESP_CLK

USB_D+

Resistance

4.7k Ω

ESP_SD3

USB_D+

ESP_IO26

AIN1

AIN3

ESP_SD2

USB_D-

ESP_SD1

ESP_IO34

AIN2

SCL

ESP_IO19

+3V3

TP1

TP2

Manufacturer Part Number

MCP23017-E/SO

TP5

Capacitance

0.1u F

Manufacturer Part Number

USB4110-GF-A

+3V3

Manufacturer Part Number

ADS1115IDGSR

TP4

+3V3

TP3

TP6

+3V3

Reviews

Design Rule Checks

Overlapping Copper

Reports copper elements that are shorting.

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

Reports missing routed traces between pads in a net.

Deprecated Rules

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

Layers with Multiple Fills

Reports layers that have multiple copper fills of different nets. Make sure the Connected Layers rule value of nets with fills is valid.

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.

Missing Footprints • 29

	Designator
	Fixed Resistor R3
	Fixed Resistor R12
	PCA9685PW, 118 U7
	Fixed Resistor R14
	Fixed Resistor R9
	Fixed Resistor R17
	Fixed Resistor R11
	Test Point TP1
	Test Point TP2
	Test Point TP5
	Fixed Resistor R8
	Fixed Resistor R5
	Generic Resistor R10
	Push Button S2
	Generic Resistor R1
	Fixed Resistor R13
	S8050 Q1
	S8050 Q2
	Test Point TP4
	Fixed Resistor R4
	Fixed Resistor R6
	Test Point TP3
	Test Point TP6
	Fixed Resistor R16
	Generic Resistor R2
	Fixed Resistor R18
	Fixed Resistor R7
	Fixed Resistor R15
	Push Button S1

Manufacturing

Manufacturer Part Number • 29

	Designator	MPN
	C9	None
	C10	None
	J18	None
	R1	None
	R2	None
	R3	None
	R4	None
	R5	None
	R6	None
	R7	None
	R8	None
	R9	None
	R10	None
	R11	None
	R12	None
	R13	None
	R14	None
	R15	None
	R16	None
	R17	None
	R18	None
	S1	None
	S2	None
	TP1	None
	TP2	None
	TP3	None
	TP4	None
	TP5	None
	TP6	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
15.0k
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

[Example] ESP32 Reference Design

Controls

Properties

License

https://creativecommons.org/licenses/by/4.0/

Manufacturing Quantity Target

Software

Arduino

Power Requirements

USB

Operating Voltage

3.3 V

Part Type

Portal

Domain

Telecommunications

System Architecture

Connectivity

WiFi

Availability & Pricing

Distributor		Qty 1
	Arrow	$142.08–$142.08
	Digi-Key	$111.38–$111.98
	LCSC	$0.57–$0.58
	Mouser	$123.92
	TME	$0.09
	Verical	$0.60–$2.88

Assets

Thumbnail

esp32.png

id=esp32

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