[Nano ESP32-S3] Motors are working off of completely wrong Arduino pins

Try removing the "D" from these pin definitions.

I think you have alternating motors backwards. One side needs "LOW/HIGH" on the motor pins while the alternate side needs "HIGH/LOW."

sketch.ino
// define MCU pin IDs
// motor A
#define PIN_ENA1_1  12
#define PIN_IN1_1   11
#define PIN_IN2_1   10

// motor B
#define PIN_ENA2_1  9
#define PIN_IN3_1   8
#define PIN_IN4_1   7

// motor C
#define PIN_ENA1_2  6
#define PIN_IN1_2   5
#define PIN_IN2_2   4

// motor D
#define PIN_ENA2_2  3
#define PIN_IN3_2   2
#define PIN_IN4_2   13

#define MOTMIN 128

void setup() {
  pinMode(PIN_IN1_1, OUTPUT);
  pinMode(PIN_IN2_1, OUTPUT);
  pinMode(PIN_ENA1_1, OUTPUT);
  pinMode(PIN_IN3_1, OUTPUT);
  pinMode(PIN_IN4_1, OUTPUT);
  pinMode(PIN_ENA2_1, OUTPUT);
  pinMode(PIN_IN1_2, OUTPUT);
  pinMode(PIN_IN2_2, OUTPUT);
  pinMode(PIN_ENA1_2, OUTPUT);
  pinMode(PIN_IN3_2, OUTPUT);
  pinMode(PIN_IN4_2, OUTPUT);
  pinMode(PIN_ENA2_2, OUTPUT);
}

void loop() {
  // MOTOR A
  digitalWrite(PIN_IN1_1, HIGH);
  digitalWrite(PIN_IN2_1, LOW);
  analogWrite(PIN_ENA1_1, MOTMIN); // A, BL; motor A moves when zero

  // // MOTOR B
  digitalWrite(PIN_IN3_1, LOW);
  digitalWrite(PIN_IN4_1, HIGH); // A
  analogWrite(PIN_ENA2_1, MOTMIN); // A; motor A immobile when zero

  // // MOTOR C
  digitalWrite(PIN_IN1_2, LOW);
  digitalWrite(PIN_IN2_2, HIGH); // BL
  analogWrite(PIN_ENA1_2, MOTMIN); // BL

  // // MOTOR D
  digitalWrite(PIN_IN3_2, HIGH);
  digitalWrite(PIN_IN4_2, LOW);
  analogWrite(PIN_ENA2_2, MOTMIN);
}
diagram.json
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