// CAN / LAB: Wiring diagram, no electrical CAN simulation.
// The custom CAN modules serve only as labelled symbols.
// No measurements, ACKs or received CAN frames are simulated.
void setup() {
Serial.begin(115200);
Serial.println("WIRING DIAGRAM: no CAN simulation or hardware validation.");
}
void loop() { delay(1000); }
Loading
esp32-c3-devkitm-1
esp32-c3-devkitm-1
SENDER | separate USB connection
Jumper wires on each breadboard:
15a -> 28a: 3V3 (red)
16a -> 27a: GND (black)
7j -> 26a: GPIO 5 / CTX (blue)
6j -> 25a: GPIO 4 / CRX (green)
24a = CANH (orange) | 23a = CANL (purple)
Module pins from left: CANL, CANH, CRX, CTX, GND, 3V3
Loading
esp32-c3-devkitm-1
esp32-c3-devkitm-1
RECEIVER | separate USB connection
Jumper wires on each breadboard:
15a -> 28a: 3V3 (red)
16a -> 27a: GND (black)
7j -> 26a: GPIO 5 / CTX (blue)
6j -> 25a: GPIO 4 / CRX (green)
24a = CANH (orange) | 23a = CANL (purple)
Module pins from left: CANL, CANH, CRX, CTX, GND, 3V3
CAN / LAB — NORMAL-OPERATION WIRING DIAGRAM
No electrical CAN simulation. ESP DevKit represents the SuperMini.
Actual SuperMini pin positions differ: follow the GPIO numbers.
Red power wires always carry 3.3 V; power each ESP via its own USB connection.