Eu estou tentando copilar este codigo e não consigo.

datalogger_esp_2:12:1: error: stray '\303' in program

bool mudança = 0; // Declarando a variavel de mudança do pino;

^

datalogger_esp_2:12:1: error: stray '\247' in program

datalogger_esp_2:86:5: error: stray '\303' in program

mudança == !mudança;

^

datalogger_esp_2:86:5: error: stray '\247' in program

datalogger_esp_2:86:5: error: stray '\303' in program

datalogger_esp_2:86:5: error: stray '\247' in program

datalogger_esp_2:89:6: error: stray '\303' in program

if (mudança == !mudança) {

^

datalogger_esp_2:89:6: error: stray '\247' in program

datalogger_esp_2:89:6: error: stray '\303' in program

datalogger_esp_2:89:6: error: stray '\247' in program

datalogger_esp_2:12:13: error: expected initializer before 'a'

bool mudança = 0; // Declarando a variavel de mudança do pino;

^

D:\Back ardui\Data logger\datalogger_esp_2\datalogger_esp_2.ino: In function 'void loop()':

datalogger_esp_2:85:22: error: expected ')' before '{' token

if (digitalRead(D3){

^

D:\Back ardui\Data logger\datalogger_esp_2\datalogger_esp_2.ino: At global scope:

datalogger_esp_2:139:7: error: expected unqualified-id before 'else'

else {

^

exit status 1
stray '\303' in program