ESP32-WROOM-32 Connection Guide

1. Setting Trace Width
Here’s exactly how to change the width of a selected trace:
  • In the right-hand panel, navigate to “Object Specific Rules.”
  • Select the Edit button and then Add.
  • Search for Trace Width in the rule selector and select Add.
  • In the property’s field, enter 3 mm.
Source: Trace Width

2. Creating a Keep-Out Zone
Use a Keep Out rule to push copper (or other objects) away from your antenna trace by 2 mm:
Keep Out Rule
  • Select the object to create a copper fill around (such as an antenna trace).
  • Navigate to the Object-specific rules on the right and click Edit → Add.
  • Find and add the Keep Out rule.
  • Enter 2 mm as the keep-out distance.
  • Flux will regenerate copper fills (and prevent other objects) within that zone.

3. Enforcing Trace Length
I couldn’t find documentation on scoping or enforcing a specific trace length (e.g., 28 mm) as a layout rule. Flux currently does not expose a “length constraint” rule—you’ll need to manually route the antenna trace to that length and verify it using the measure tool.
If you have further questions, you can browse the Flux docs or join the Flux User Community:
Measure trace length
Draw exact length
Compute impedance
Multi-layer keep-out
U4
Not Recommended for New Designs
U3
U1 IO12 - R6 1
U1 GND - U2 GND
U1 GND - U2 GND
C7 1 - C8 1
U1 GND - U2 GND
U1 IO34 - U4 VIOUT
U1 GND - U2 GND
D2 A - D3 A
GND
D2 A - D3 A
C7 1 - C8 1
C11
Capacitance
0.1µF
D8
U1 IO21 - U3 SDA
D2 A - D3 A
U1 IO17 - U2 HST_RXD
U1 IO27 - R7 P2
D2 A - D3 A
D2 A - D3 A
B1
U1
U7
U1 IO12 - R6 1
U1 IO22 - U3 SCL
D2 A - D3 A
K1 COM_1 - Q1 C
D2 A - D3 A
U1 IO34 - U4 VIOUT
U1 3.3V - U3 VIN
C8
Capacitance
0.1µF
U1 GND - U2 GND
U1 IO16 - U2 HST_TXD
U1 IO13 - R5 1
D2 A - D3 A
D2 A - D3 A
U1 IO12 - R6 1
K1 COM_1 - Q1 C
U1 IO27 - R7 P2
C9
Capacitance
0.1µF
U1 IO13 - R5 1
D2 A - D3 A
U3 INT - U1 IO35
U1 3.3V - U3 VIN
U1 IO27 - R7 P2
U1 IO22 - U3 SCL
U1 IO21 - U3 SDA
U3 INT - U1 IO35
U5 BAT - B1 POSITIVE
D2 A - D3 A
U1 GND - U2 GND
D2 A - D3 A
C7
Capacitance
0.1µF
U1 IO34 - U4 VIOUT
U5 BAT - B1 POSITIVE
D2 A - D3 A
U1 IO13 - R5 1
C7 1 - C8 1
D2
Q1
C12
Capacitance
47uF
D6
C13
D3
U5
D4
LED1
R7
Resistance
10kΩ
LED2
D5
TP3
U8
TP1
D7
TP2
R2 (Prog)
Resistance
2.4kΩ
K1
C10
Capacitance
47µF
R6
R5


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Electric Emerald Lightcycle

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