Wrong output display in TM1637 Display, correct in Serial Monitor

Using Arduino Programming Questions
1

Hi,

I am making a project to display Time & Gas Leakage detector for Kitchen.
I am using TM1637 for display, DS3231 for RTC & MQ-2 for gas leakage detection.

While running the attached code, I am getting correct time displayed but the Gas sensor output is incorrect in Display.
But the output is correct in Serial Monitor.

I have searched google and some programming guide but to no avail.
Can you please correct my mistake.
Below is the code snippet:

const byte gas_sensor = 0; 
int gas_level;

gas_level= analogRead(gas_sensor);  
display.point(POINT_OFF);
display.display(gas_sensor);
Serial.println(gas_level);

GAS_TIME_TM1637_DS3231.ino (1.51 KB)

2

(deleted)

3

Hi,

const byte gas_sensor = 0;
int gas_level;

gas_level= analogRead(gas_sensor); 
display.point(POINT_OFF);
display.display(gas_sensor);
Serial.println(gas_level);

you send gas_level to the monitor but send gas_sensor to the display.

Tom... :slight_smile:

4 
I am making a project to display Time & Gas Leakage detector

I'd like a time leakage detector too. I seem to be losing a lot of it lately. :frowning:

5

TomGeorge:
Hi,

const byte gas_sensor = 0;

int gas_level;

gas_level= analogRead(gas_sensor);
display.point(POINT_OFF);
display.display(gas_sensor);
Serial.println(gas_level);



you send **[u]gas_level[/u]** to the monitor but send **[u]gas_sensor[/u]** to the display.

Tom... :)

Corrected the code to output "gas_level", still output seems to be garbled.

gas_level= analogRead(gas_sensor); //Gas Sensor get data
display.point(POINT_OFF);
display.display(gas_level);
Serial.println(gas_level);

Sometimes output is 0400, 8CUU, 040, 8888, or even strange character like incomplete digits, characters etc.
The display in Serial monitor is correct like:
154
161
152
152
157
152

Regards,
Amandeep Singh

6

Hi,
Can you show us a picture of your project please.
What sort of display are you using?

Tom... :slight_smile:

7

Please find the attached images for the project.

I am using TM1637 display.

I use this Library for the
https://codebender.cc/library/TM1637#TM1637.h

correct time output.jpg
correct time output.jpg1135×638 114 KB

Wrong sensor output.jpg
Wrong sensor output.jpg1135×638 102 KB

8

I think there is either a variable type declaration error or the display library calling function is wrong.
Please assist in resolving my issue.

9

Issue resolved after Library code analysis.

Below is the final Code snippet that worked:

void loop()
{
gas_level= analogRead(gas_sensor);
display.DigitDisplayWrite(CLK,DIO,gas_level);
Serial.println(gas_level);
delay (1000);
}

10

amanjosan2008:
Issue resolved after Library code analysis.

There must be a lesson in that somewhere..... :wink: