Marine LED Controller Design
1:54
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Accessed Knowledge (1)
Consulting on touch connectors.
Exploring WLED touch features.
Addressing WLED touch replication.
Linking components accurately.
Mapping ESP32 touch GPIOs.
Using Knowledge Base Tool.
Looking for "capacitive touch pins list" in esp32_datasheet_en.pdf
Looking for "GPIO mapping for touch channels T0 to T9" in esp32_datasheet_en.pdf
Looking for "recommended pins for capacitive touch on module" in esp32_datasheet_en.pdf
Looking for "touch sensor peripheral electrical characteristics input capacitance cable length guidelines" in esp32_datasheet_en.pdf
Searching web for: "ESP32 touch pins T0 T9 mapping GPIO list datasheet"
Found 1 results.
Proposing remote touch solutions.
Great idea. Short version: the ESP32 can expose many touch channels, but raw capacitive touch does not travel well over wires. Break out several local touch pads/connectors on the master, and if you need remote touch at slaves, use a small touch-to-digital converter locally and return a clean digital signal to the master.
What WLED/ESP32 can support
- Hardware: U3 supports up to 10 capacitive touch channels (T0–T9). Safe-to-use pins (avoid boot strapping pins) are typically: T8=GPIO33, T9=GPIO32, T7=GPIO27, T6=GPIO14, T4=GPIO13, T0=GPIO4.
- Software: WLED supports at least one touch/button input out of the box. Multiple independent touch inputs may require custom configuration/usermod. Plan hardware breakouts now; firmware can map them later.
Proposed touch breakouts on this board (through-holes or pads)
- TOUCH1: GPIO33 (T8) on U3
- TOUCH2: GPIO32 (T9)
- TOUCH3: GPIO27 (T7)
- TOUCH4: GPIO14 (T6)
- TOUCH5: GPIO13 (T4)
- TOUCH6: GPIO4 (T0) Notes:
- Label each as TOUCHx and provide an adjacent GND through-hole for shield/frame wiring.
- Place a small series resistor at the MCU side (100–470 Ω) and an ESD path near the connector (e.g., a low-cap TVS Diode). We can also tie these lines into the existing ESD array D1 if channels are available.
About long cables and multiple slaves
- Raw capacitive touch over long leads is very sensitive to cable capacitance and noise. Expect unreliable behavior as length increases; shielding and careful routing help but only to a point.
- Recommended for remote/slave locations:
- Put a tiny touch IC at each remote point (e.g., AT42QT1010 or TTP223) and output a clean digital signal back to the master. Protect with series resistor + TVS at the connector.
- If you only need an “any touch” signal from 6 slaves, wire-OR the open-drain outputs (or diode-OR) to a single input on the master with a pull-up at the master.
- For long runs or noisy marine wiring, consider differential signaling (RS-485 transceivers) for robustness, still driven by the remote touch IC’s digital output.
WS driver data routing recap
- Keep ESP32 D1 (selected GPIO) -> WS2805 DIN1.
- Board “DATA IN” connector -> WS DIN2 (or selectable via solder-jumper).
- WS DOUT -> “DATA OUT” connector.
- This preserves master/slave chaining without needing the ESP32 populated.
Want me to add six TOUCHx + GND through-hole pairs (with series resistors and ESD footprints) and assign them to GPIO33, 32, 27, 14, 13, 4 on U3? If yes, also tell me:
- Approximate cable lengths to the touch contacts.
- Whether you prefer local remote touch ICs at slaves (recommended) or raw touch lines back to the master.
34 days
Ready to start.
Show Plan
D4
R11 P2 - D3 2
R1 P2 - Q1 G
D3
Q4
C3
Capacitance
22 uF
C1
Capacitance
10 uF
C2 P1 - U2 LX
D4
D2
J1 2 - GND GND
Q3
C4
Capacitance
0.1 uF
C2
Capacitance
0.1 uF
Q5
J1 2 - GND GND
D4
C4 P1 - U2 BOOT
D3 1 - D2 2
Q2
Q1
J1 2 - GND GND
J1 2 - GND GND
D4
J1 2 - GND GND
U1 VS - U2 VIN
U1 VS - U2 VIN
Q1 D - R11 P1
D3 1 - D2 2
D1
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- 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 #CommonPartsLibraryjharwinbarrozo1.5M
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