Full Wiring 3 โ€” FRONT-board I/O + RS485 panel

wheel / pinch = zoom ยท drag = pan
fw3_controller FULL WIRING SHEET 3 of 5 โ€” FRONT-BOARD I/O + RS485 PANEL, PIN-LEVEL (rev 3.32 โ€” Option B) This is the FRONT Waveshare. The BED Waveshare is its own cluster (combiner + camp loads + a tailgate Modbus panel) โ€” see sheet 7 + sheet 6. Waveshare ESP32-S3-ETH-8DI-8DO: DIs optocoupler-isolated (wire each sense + the DI COM), DOs = 500mA Darlington sinks w/ built-in flyback. Sense taps off vehicle circuits get a SMALL fuse (1-2A) AT THE TAP. DI/DO signal wiring = 20-22 AWG or solid Cat5 (secure every 12in; stranded across door jambs). LEGEND:  blue = DI sense in  ยท  purple dashed = DO sink out (to Sheet-2 pin 85)  ยท  magenta = RS485 bus  ยท  green = LED drive  ยท  red = 12V power  ยท  black = ground cluster_di VEHICLE DI SENSES (each tap fused 1-2A AT the tap; 22 AWG) ctrl WAVESHARE ESP32-S3-ETH-8DI-8DO (always-on) V+ 7-36V GND DI1 DI2 DI3 DI4 DI5 DI COM DO1..DO8 (to Sheet 2 pin-85s) RS485 A RS485 B ETH (W5500) mod MODBUS RTU IO 8CH @ CAB PANEL (SKU 26244, addr 2) V+ GND A B DI1 DI2 DI COM DO1 DO2 ctrl:b->mod:b (B pairs with A in pair 1) cat5 ONE solid Cat5 home (panel -> controller): pair 1 = RS485 A/B ยท pair 2 = 12V + GND ยท 2 pairs spare (120R termination both bus ends only if long/fast) ctrl:a->cat5 do2 Sheet 2: relay pin-85s (O1,O2,O4,O5,O6,O7 + panel M-DOs) ctrl:do1->do2 8 sinks via one solid Cat5 (20-22 AWG) eth Switch A (data only โ€” NOT PoE) Sheet 4 ctrl:eth->eth Cat5e (data) door Door: dome-light circuit tap door->ctrl:di1 22 AWG ign Ignition: 12V-switched fuse-tap (add-a-fuse) ign->ctrl:di2 22 AWG rev Reverse: reverse-lamp circuit tap rev->ctrl:di3 22 AWG btn Dash button: dry contact -> GND btn->ctrl:di4 22 AWG temp Cab temp / batt-V sense (ADC) temp->ctrl:di5 ana MODBUS ANALOG IN 8CH (OPTIONAL, addr 3) A B AI1: air-tank 4-20mA PSI ... mod:b->ana:a daisy-chain, same 2 wires gnd GND (front - bus reference) mod:g->gnd via Cat5 pair 2 note GESTURES & PLACEMENT โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€โ”€ โ€ข Multi-click / press-and-hold switches -> NATIVE DI  (instant edge); simple on/off overrides -> the polled  Modbus module (~100-300ms poll blurs fast clicks). โ€ข DMWD LED is 12-24V w/ BUILT-IN resistor: LED+ -> 12V  rail, LED- -> module DO (sinks when state = ON). โ€ข Module DI is PNP/NPN โ€” dry contact OR 12V both OK. โ€ข Debounce all buttons in ESPHome. sw1 DMWD SW1 ROCK (momentary) NO COM LED+ LED- sw1:no->mod:d1 22-24 AWG (panel-local) sw1:com->mod:dc COM -> GND sw1:lm->mod:o1 LED- -> DO1 (sinks when ON) sw2 DMWD SW2 FOG (momentary) NO COM LED+ LED- sw2:no->mod:d2 22-24 AWG sw2:com->mod:dc sw2:lm->mod:o2 LED- -> DO2 cat5->mod:a pwr Always-on 12V (box F12, 3A, 18 AWG) pwr->ctrl:vp 18 AWG cabp Cab panel 12V rail (tap, 1-2A inline fuse) cabp->mod:v module power (via Cat5 pair 2) cabp->sw1:lp 12V -> LED+ (built-in resistor) cabp->sw2:lp gnd->ctrl:dic DI COM gnd->ctrl:vg

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