Schematic for ESP32-WROOM-32E Reference Design 3jT2: Bus-Powered...

USB-C BLE Dongle Design Assistance

rintoj

110 days

flux

0:40

General

Project

Hi! How can I help with your USB‑C BLE dongle project today?

Options I can take care of:

Review ERC/DRC and highlight fixes
Check part availability/cost and suggest substitutions
Improve USB‑C/ESD/power input protection
Tidy schematic nets and designators
Prep for production: BOM sanity and manufacturability review

What would you like to tackle first?

Review ERC/DRC

Add surge protection

ESD diode capacitance

BLE module selection

BOM manufacturability

110 days

Ready.

U14

Reviews

Electrical Rule Checks

Missing Footprints

Reports parts that have no footprint.

Design Rule Checks

Overlapping Copper • 196

Des	Net	Des	Net
R32:P1	CC2	Trace eb50	Net 35
BOOT:～4	GND	R34:1	None
J2:Pin_7	GND	R24:P1	None
PWR:K	GND	D_SCHOT:A	None
U1:GND	GND	LED1:K	Net 29
Trace 2a49	Net 3	C17:2	None
Trace 4c56	Net 3	C17:1	None
Trace 4c56	Net 3	C17:2	None
Trace 7e7c	Net 3	F2:P1	None
Trace 72fe	Net 3	R21:P1	None
Trace 269e	Net 3	R21:P1	None
Trace 5836	Net 3	F2:P1	None
Trace 5836	Net 3	L1:1	None
Trace 46f4	Net 6	C23:P1	None
Trace 96e1	Net 6	R21:P2	None
Via	Net 6	C23:P1	None
J2:Pin_6	Net 13	C44:1	None
J2:Pin_6	Net 13	C44:2	None
Trace 8cd0	Net 13	C44:1	None
Trace 2ed2	Net 14	D_TVS:2	None
Trace 3dc6	Net 14	D_TVS:2	None
PWR:A	Net 16	D_SCHOT:K	None
R4:P1	Net 16	D_SCHOT:K	None
Trace a60f	Net 16	D_SCHOT:K	None
Trace 1068	Net 18	J3:～	None
Trace 00e3	Net 19	J3:～	None
J1:Pin_9	Net 20	R37:P1	None
Trace 4bf1	Net 20	J3:～	None
Trace 3053	Net 21	R37:P2	None
Trace ad83	Net 21	R37:P2	None
Trace 3ead	Net 22	C40:1	None
Trace 3ead	Net 22	R18:P2	None
Trace 181b	Net 22	R18:P2	None
J1:Pin_11	Net 23	U9:GND	None
J1:Pin_12	Net 24	U9:VOUT	None
Trace 428a	Net 24	J3:～	None
J1:Pin_13	Net 25	R33:2	None
J1:Pin_13	Net 25	U9:VIN	None
Trace 5c76	Net 25	R33:2	None
Trace 5c76	Net 25	U9:VIN	None
D3:K	Net 27	Trace 68d2	Net 29
D3:K	Net 27	Trace 80b1	Net 29
D3:K	Net 27	Trace 62ef	Net 35
F3:P1	Net 27	J6:GND	None
F3:P1	Net 27	J6:VBUS	None
F3:P2	Net 27	J6:DN1	USBDN
F3:P2	Net 27	J6:DP1	USBDP
F3:P2	Net 27	J6:DP2	USBDP
J1:Pin_16	Net 27	J_PWR:～	None
Trace 474f	Net 27	J_PWR:～	None
Trace 474f	Net 27	J_PWR:～	None
U1:VIN	Net 27	TP8:1	None
J2:Pin_15	Net 29	U5:EN	None
J2:Pin_15	Net 29	U5:EP	None
J2:Pin_15	Net 29	U5:IN	None
Trace 9c0a	Net 29	R32:P1	CC2
Trace 0258	Net 29	R32:P1	CC2
Trace 6407	Net 29	R25:P2	None
Trace 8015	Net 29	R32:P1	CC2
J2:Pin_10	Net 30	J5:Center pin	None
J2:Pin_11	Net 31	J5:Center pin	None
Trace 1ac1	Net 31	U6:～RESET	None
Trace 1ac1	Net 31	U6:R	None
Trace 1ac1	Net 31	U6:VDD	None
Trace 1ac1	Net 31	U6:VSS	None
Trace 34c1	Net 31	C29:1	None
Trace 34c1	Net 31	C29:2	None
U2:IO17	Net 31	C29:1	None
U2:IO17	Net 31	C29:2	None
J2:Pin_12	Net 32	J5:Center pin	None
Trace 5251	Net 32	R18:P1	None
Trace 7210	Net 32	J5:Center pin	None
Trace 7210	Net 32	R25:P1	None
U2:IO16	Net 32	C29:1	None
U2:IO16	Net 32	C29:2	None
Trace 3d3e	Net 33	J5:Center pin	None
Trace 32dd	Net 33	J5:Center pin	None
Trace 32dd	Net 33	R25:P1	None
Trace 66ed	Net 33	R18:P1	None
Trace 1756	Net 33	U6:VSS	None
Trace 04d3	Net 34	U6:ALERT	None
Trace 04d3	Net 34	U6:SCL	None
Trace 05ed	Net 34	J6:SHIELD	None
Trace a3f6	Net 34	R32:P2	GND
J2:Pin_16	Net 35	C43:1	None
J2:Pin_16	Net 35	C43:2	None
Trace 62ef	Net 35	U5:GND	None
Trace 62ef	Net 35	U5:OUT	None
Trace 85bb	Net 35	R32:P1	CC2
C17:2	None	Trace b1df	Net 3
C17:2	None	U1:TAB(VOUT)	Net 3
C20:P1	None	Q1:D	Net 6
C20:P1	None	Trace c813	Net 6
C20:P2	None	Q1:G	Net 2
C20:P2	None	Trace ddf2	Net 2
C23:P1	None	Trace ebdc	Net 6
C23:P2	None	Trace ebdc	Net 6
C28:1	None	Trace 89c0	Net 20
C28:1	None	U2:IO25	Net 20
C28:2	None	U2:IO25	Net 20
C30:P1	None	Trace 91a0	Net 6
C30:P2	None	Trace 9133	Net 6
C30:P2	None	Trace eb50	Net 35
C32:P2	None	J2:Pin_4	Net 11
C40:1	None	J2:Pin_8	Net 22
C40:2	None	J2:Pin_8	Net 22
C43:1	None	Trace f777	Net 35
C44:1	None	Trace fe4e	Net 13
C44:P1	None	R32:P2	GND
C44:P2	None	Trace 5251	Net 32
C44:P2	None	Trace 66ed	Net 33
D4:K	None	J2:Pin_2	Net 4
D4:K	None	J2:Pin_3	Net 8
F2:P2	None	Trace b1df	Net 3
F2:P2	None	Trace bbfc	Net 3
F2:P2	None	U1:TAB(VOUT)	Net 3
F2:P2	None	IC1:RXD	Net 11
F2:P2	None	Trace 4f7b	Net 11
F2:P2	None	IC1:TXD	Net 12
F2:P2	None	Trace 2d65	Net 12
F2:P2	None	Trace cec2	Net 12
J3:～	None	Trace 78ce	Net 17
J3:～	None	Trace da0e	Net 18
J3:～	None	Trace 5b79	Net 19
J3:～	None	Trace 9e61	Net 19
J3:～	None	Trace c652	Net 19
J3:～	None	Trace e4d2	Net 21
J3:～	None	Trace d811	Net 23
J3:～	None	Trace 9ff3	Net 24
J3:～	None	Trace d3bb	Net 25
J3:～	None	Trace fdbe	Net 25
J5:Center pin	None	Trace b1df	Net 30
J5:Center pin	None	Trace c5ce	Net 31
J5:Center pin	None	Trace d3db	Net 31
J5:Center pin	None	Trace c757	Net 32
J6:None	None	C10:P1	Net 34
J6:SHIELD	None	BOOT:～4	GND
J6:SHIELD	None	BOOT:～3	Net 34
J_PWR:～	None	J6:CC1	CC1
J_PWR:～	None	C5:P2	GND
J_PWR:～	None	C5:P1	Net 27
J_PWR:～	None	F3:P1	Net 27
J_PWR:～	None	F3:P2	Net 27
J_PWR:～	None	F3:P2	Net 27
J_PWR:～	None	J6:DN1	USBDN
J_PWR:～	None	J6:DN2	USBDN
J_PWR:～	None	J6:DP1	USBDP
L1:1	None	LED1:A	Net 3
L1:1	None	Trace 7e7c	Net 3
R8:P2	None	Trace da5a	Net 6
R9:P1	None	Trace 4d85	Net 29
R9:P1	None	Trace 6407	Net 29
R9:P1	None	Trace 3d3e	Net 33
R9:P1	None	Trace 32dd	Net 33
R9:P1	None	Trace 6ee2	Net 34
R9:P1	None	Trace 8bd5	Net 34
R9:P2	None	J2:Pin_12	Net 32
R9:P2	None	Trace c757	Net 32
R18:P2	None	Trace dbb6	Net 28
R21:P2	None	Trace b00c	Net 6
R24:P2	None	Trace dbb6	Net 28
R24:P2	None	Trace cca4	Net 30
R25:P1	None	Trace c757	Net 32
R25:P2	None	Trace b4c0	Net 6
R25:P2	None	Trace f4dc	Net 29
R25:P2	None	Trace 9ed5	Net 35
R25:P2	None	Trace a5db	Net 35
TP6:1	None	F1:P2	Net 27
TP8:1	None	Trace bbb7	Net 27
U4:AGND	None	C5:P2	GND
U4:AGND	None	C9:P2	GND
U4:EN	None	C9:P2	GND
U4:PGND	None	C5:P2	GND
U4:PVIN	None	C9:P2	GND
U4:SW	None	C5:P2	GND
U5:IN	None	Trace 80b1	Net 29
U6:～RESET	None	Trace 5251	Net 32
U6:ALERT	None	Trace 49ef	Net 34
U6:ALERT	None	U2:IO0	Net 34
U6:R	None	Trace 5251	Net 32
U6:SCL	None	Trace 49ef	Net 34
U6:SCL	None	U2:IO0	Net 34
U6:SDA	None	Trace 7865	Net 33
U6:SDA	None	U2:IO4	Net 33
U6:VDD	None	Trace 5251	Net 32
U6:VSS	None	Trace 5251	Net 32
U6:VSS	None	Trace 66ed	Net 33
U6:VSS	None	Trace 7865	Net 33
U6:VSS	None	U2:IO4	Net 33
U6:VSS	None	U2:IO0	Net 34
U9:GND	None	Trace a883	Net 23
U9:TAB(VOUT)	None	U1:GND	GND
U9:TAB(VOUT)	None	LED1:A	Net 3
U9:TAB(VOUT)	None	Trace 7e7c	Net 3
U9:TAB(VOUT)	None	LED1:K	Net 29
U9:VOUT	None	Trace bed2	Net 24

Invalid Layer

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

Component Overrides • 26

	Designator	Ruleset
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊
	＊｀REF｀＊	Override rule for ＊｀REF｀＊

Airwires • 23

	Designators	Net
	J6:CC1, R31:P1	CC1
	J6:CC2, R32:P1	CC2
	BOOT:～2, D5:2	GND
	J2:Pin_7, R32:P2	GND
	Via-Island-0:Via-Island-0, D6:2	GND
	Via-Island-3:Via-Island-3, R31:P2	GND
	J1:Pin_1, R35:P2	Net 3
	R35:P2, R36:P2	Net 3
	Trace 76d0:Trace 76d0, R35:P1	Net 6
	D1:K, Trace ef0a:Trace ef0a	Net 27
	D3:A, D3:K	Net 27
	F3:P1, F1:P2	Net 27
	Trace 6f38:Trace 6f38, D3:K	Net 27
	LED1:K, R34:P2	Net 29
	LED1:K, Trace f921:Trace f921	Net 29
	R34:P2, R34:P1	Net 29
	Trace 6013:Trace 6013, R36:P1	Net 34
	J6:DN1, D6:1	USBDN
	J6:DN2, IC2:UD-	USBDN
	J6:DP1, D5:1	USBDP
	J6:DP1, IC2:UD+	USBDP
	J6:DP1, J6:DP2	USBDP
	Fill:Fill, BOOT:～4	None

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.

Manufacturing

Manufacturer Part Number • 67

	Designator	MPN
	C1	None
	C2	None
	C3	None
	C4	None
	C5	None
	C6	None
	C7	None
	C8	None
	C9	None
	C10	None
	C11	None
	C18	None
	C19	None
	C20	None
	C21	None
	C22	None
	C23	None
	C30	None
	C31	None
	C32	None
	C33	None
	C34	None
	C35	None
	C42	None
	C43	None
	C44	None
	J1	None
	J2	None
	LED1	None
	PWR	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
	R19	None
	R20	None
	R21	None
	R22	None
	R23	None
	R24	None
	R25	None
	R26	None
	R27	None
	R28	None
	R31	None
	R31	None
	R32	None
	R32	None
	R33	None
	R34	None
	R35	None
	R36	None
	R37	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-WROOM-32E Reference Design 3jT2

Controls

Properties

System Architecture

flowchart LR HostUSB[Host USB Port] --> CC[CC Resistors/ESD Protection] CC --> PTC[PTC Fuse] PTC --> LDO[LDO 3.3V Regulator] LDO --> V33[3.3V Rail] V33 --> BLE[BLE Module] V33 --> USBIF[USB Interface]

License

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

Availability & Pricing

Distributor		Qty 1

Assets

Thumbnail

ESP32-WROOM-32E Reference Design-removebg-preview.png

id=ESP32-WROOM-32E Reference Design-removebg-preview

Welcome 👋

Flux helps you build PCBs faster with an AI teammate!

Create your account to collaborate, stay updated, fork your own version, and get instant answers from our AI agent.