Parsing char array to integer, atoi() returns squares
I'm using an android app to send values to control servos.
Code:
char inputData[4];
char buffer[3];
void loop()
if(Serial.available() > 3)
for (int i = 0; i < 4; i++)
inputData[i] = Serial.read();
char buffer[4];
buffer[0] = inputData[1];
buffer[1] = inputData[2];
buffer[2] = inputData[3];
buffer[3] = '';
int angle = atoi(buffer);
Serial.write(angle);
Issue: I'm getting the values + A-F letters to address each servo - A10, A180, B30 etc. Now the trouble is turning this to an actual integer. As you can see I've declared a character array to store the integers in and as suggested in a post on the arduino forum, I added a at the end of the array. Currently, the Atoi returns random characters, mostly squares and some random numbers. I've tried even assigning them to a string and then .toInt() but same issue there, mostly squares.
Any ideas?
Thanks!
arduino hc-05
asked Nov 10 '18 at 17:55
duck headduck head
103
add a comment |
I'm using an android app to send values to control servos.
Code:
char inputData[4];
char buffer[3];
void loop()
if(Serial.available() > 3)
for (int i = 0; i < 4; i++)
inputData[i] = Serial.read();
char buffer[4];
buffer[0] = inputData[1];
buffer[1] = inputData[2];
buffer[2] = inputData[3];
buffer[3] = '';
int angle = atoi(buffer);
Serial.write(angle);
Issue: I'm getting the values + A-F letters to address each servo - A10, A180, B30 etc. Now the trouble is turning this to an actual integer. As you can see I've declared a character array to store the integers in and as suggested in a post on the arduino forum, I added a at the end of the array. Currently, the Atoi returns random characters, mostly squares and some random numbers. I've tried even assigning them to a string and then .toInt() but same issue there, mostly squares.
Any ideas?
Thanks!
arduino hc-05
asked Nov 10 '18 at 17:55
duck headduck head
103
add a comment |
I'm using an android app to send values to control servos.
Code:
char inputData[4];
char buffer[3];
void loop()
if(Serial.available() > 3)
for (int i = 0; i < 4; i++)
inputData[i] = Serial.read();
char buffer[4];
buffer[0] = inputData[1];
buffer[1] = inputData[2];
buffer[2] = inputData[3];
buffer[3] = '';
int angle = atoi(buffer);
Serial.write(angle);
Issue: I'm getting the values + A-F letters to address each servo - A10, A180, B30 etc. Now the trouble is turning this to an actual integer. As you can see I've declared a character array to store the integers in and as suggested in a post on the arduino forum, I added a at the end of the array. Currently, the Atoi returns random characters, mostly squares and some random numbers. I've tried even assigning them to a string and then .toInt() but same issue there, mostly squares.
Any ideas?
Thanks!
arduino hc-05
asked Nov 10 '18 at 17:55
duck headduck head
103
I'm using an android app to send values to control servos.
Code:
char inputData[4];
char buffer[3];
void loop()
if(Serial.available() > 3)
for (int i = 0; i < 4; i++)
inputData[i] = Serial.read();
char buffer[4];
buffer[0] = inputData[1];
buffer[1] = inputData[2];
buffer[2] = inputData[3];
buffer[3] = '';
int angle = atoi(buffer);
Serial.write(angle);
Issue: I'm getting the values + A-F letters to address each servo - A10, A180, B30 etc. Now the trouble is turning this to an actual integer. As you can see I've declared a character array to store the integers in and as suggested in a post on the arduino forum, I added a at the end of the array. Currently, the Atoi returns random characters, mostly squares and some random numbers. I've tried even assigning them to a string and then .toInt() but same issue there, mostly squares.
Any ideas?
Thanks!
arduino hc-05
arduino hc-05
asked Nov 10 '18 at 17:55
duck headduck head
103
asked Nov 10 '18 at 17:55
duck headduck head
103
asked Nov 10 '18 at 17:55
duck headduck head
103
asked Nov 10 '18 at 17:55
duck headduck head
103
asked Nov 10 '18 at 17:55
duck headduck head
103
103
add a comment |
add a comment |
1 Answer
1
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oldest
votes
Use print or println to see the number as text. write sends it as byte and Serial Monitor shows a symbol with that ASCII code.
answered Nov 10 '18 at 18:50
JurajJuraj
344310
I don't really need to print it though. I want to use it as a value. Say I atoi() it, would it make it an integer even though it prints random characters ?
– duck head
Nov 10 '18 at 18:59
you want to see the value in Serial Monitor as text, not as a symbol with this value as ascii code
– Juraj
Nov 10 '18 at 19:01
Yes but is the variable a proper integer before printing ?
– duck head
Nov 10 '18 at 19:15
why not? Serial.print(int) wouldn't lie
– Juraj
Nov 10 '18 at 20:37
add a comment |
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1 Answer
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1 Answer
1
active
oldest
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active
oldest
votes
active
oldest
votes
Use print or println to see the number as text. write sends it as byte and Serial Monitor shows a symbol with that ASCII code.
answered Nov 10 '18 at 18:50
JurajJuraj
344310
I don't really need to print it though. I want to use it as a value. Say I atoi() it, would it make it an integer even though it prints random characters ?
– duck head
Nov 10 '18 at 18:59
you want to see the value in Serial Monitor as text, not as a symbol with this value as ascii code
– Juraj
Nov 10 '18 at 19:01
Yes but is the variable a proper integer before printing ?
– duck head
Nov 10 '18 at 19:15
why not? Serial.print(int) wouldn't lie
– Juraj
Nov 10 '18 at 20:37
add a comment |
Use print or println to see the number as text. write sends it as byte and Serial Monitor shows a symbol with that ASCII code.
answered Nov 10 '18 at 18:50
JurajJuraj
344310
I don't really need to print it though. I want to use it as a value. Say I atoi() it, would it make it an integer even though it prints random characters ?
– duck head
Nov 10 '18 at 18:59
you want to see the value in Serial Monitor as text, not as a symbol with this value as ascii code
– Juraj
Nov 10 '18 at 19:01
Yes but is the variable a proper integer before printing ?
– duck head
Nov 10 '18 at 19:15
why not? Serial.print(int) wouldn't lie
– Juraj
Nov 10 '18 at 20:37
add a comment |
Use print or println to see the number as text. write sends it as byte and Serial Monitor shows a symbol with that ASCII code.
answered Nov 10 '18 at 18:50
JurajJuraj
344310
Use print or println to see the number as text. write sends it as byte and Serial Monitor shows a symbol with that ASCII code.
answered Nov 10 '18 at 18:50
JurajJuraj
344310
edited Nov 10 '18 at 19:04
answered Nov 10 '18 at 18:50
JurajJuraj
344310
answered Nov 10 '18 at 18:50
JurajJuraj
344310
answered Nov 10 '18 at 18:50
JurajJuraj
344310
344310
I don't really need to print it though. I want to use it as a value. Say I atoi() it, would it make it an integer even though it prints random characters ?
– duck head
Nov 10 '18 at 18:59
you want to see the value in Serial Monitor as text, not as a symbol with this value as ascii code
– Juraj
Nov 10 '18 at 19:01
Yes but is the variable a proper integer before printing ?
– duck head
Nov 10 '18 at 19:15
why not? Serial.print(int) wouldn't lie
– Juraj
Nov 10 '18 at 20:37
add a comment |
I don't really need to print it though. I want to use it as a value. Say I atoi() it, would it make it an integer even though it prints random characters ?
– duck head
Nov 10 '18 at 18:59
you want to see the value in Serial Monitor as text, not as a symbol with this value as ascii code
– Juraj
Nov 10 '18 at 19:01
Yes but is the variable a proper integer before printing ?
– duck head
Nov 10 '18 at 19:15
why not? Serial.print(int) wouldn't lie
– Juraj
Nov 10 '18 at 20:37
I don't really need to print it though. I want to use it as a value. Say I atoi() it, would it make it an integer even though it prints random characters ?
– duck head
Nov 10 '18 at 18:59
I don't really need to print it though. I want to use it as a value. Say I atoi() it, would it make it an integer even though it prints random characters ?
– duck head
Nov 10 '18 at 18:59
you want to see the value in Serial Monitor as text, not as a symbol with this value as ascii code
– Juraj
Nov 10 '18 at 19:01
you want to see the value in Serial Monitor as text, not as a symbol with this value as ascii code
– Juraj
Nov 10 '18 at 19:01
Yes but is the variable a proper integer before printing ?
– duck head
Nov 10 '18 at 19:15
Yes but is the variable a proper integer before printing ?
– duck head
Nov 10 '18 at 19:15
why not? Serial.print(int) wouldn't lie
– Juraj
Nov 10 '18 at 20:37
why not? Serial.print(int) wouldn't lie
– Juraj
Nov 10 '18 at 20:37
add a comment |
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