u
int r1 = Serial.read()- 48;
int r2 = Serial.read()- 48;
int r3 = Serial.read()- 48;
int r4 = Serial.read()- 48;
int uart_data = ((int)r1 * 1000) + ((int)r2 * 100) + ((int)r3 * 10) + (int)r4;
Size: a a a
u
int r1 = Serial.read()- 48;
int r2 = Serial.read()- 48;
int r3 = Serial.read()- 48;
int r4 = Serial.read()- 48;
int uart_data = ((int)r1 * 1000) + ((int)r2 * 100) + ((int)r3 * 10) + (int)r4;
u
AU
PB
PB
AU
PB
AU
О
О
Y
Y
KB
BG
BG
BG
Y
Y
Y
Y