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how to read data from the lcd display

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Li_ereunpisan

Li_ereunpisan

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I want to read the display data character from the lcd to 8951 .. then I will use this data to turn on or turn off the relay.
examples of such characters below

img00007201108060306.jpg

picture above shows hours 02:07:11 am,, how do I know that micro-8951 is currently at 02:07:11 am??
it is done so at the time at 02:07:11 am the relay on and at the relay off at 2:07:11 pm.
this continues despite continuous power supply off, the data is still stored
 

I don't think there is a point in reading the screen to check what time it is, this time is calculated in the mcu and send to the LCD to be shown so you can just read the proper variable in the code to check the value and trigger an alarm.

Alex
 
alexan_e said:
I don't think there is a point in reading the screen to check what time it is, this time is calculated in the mcu and send to the LCD to be shown so you can just read the proper variable in the code to check the value and trigger an alarm.

Alex
Click to expand...

if it did not adopt me ... keep in order to learn how to micro 8951 is what time it is read from the lcd or read from the RTC
.. please help me the solution because I am not an expert in this

thx
 

@Eazyrider83
ouh .. if so how to read from the lcd could not possibly be ...
if not how to read is what time in the RTC?, it's all right though out off topic
 

The chip marking is not visible in your picture but you are probably using DS1307, if this is the case there in no alarm that can be set to wake up the mcu when the time matches the pre programmed time, you have to do a continuous check in software.
When the power is off then DS1307 keeps the time by using the battery but there is no way to read and compare that value if the mcu doesn't turn on.

Alex
 

@alexan

I did using a DS1307 .. I want to make a routine program that reads the clock continuously DS1307, DS1307 issue is if the data clock at 10:00 am ,then uController will activate the relay.
so... data at 10.00 am already embedded in uController, although the power supply off regular reading program at 10:00 am will not be lost.
only problem is I can not program with the intention of writing the way I want
 

wanditea said:
I want to read the display data character from the lcd to 8951 .. then I will use this data to turn on or turn off the relay.
examples of such characters below


Do You need timer circuit ? Or this problem is linked to this with LCD?
Click to expand...
 

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