sht75 code locked up

[mister_e]

In addition to Melanie, how about if you disconnect all pins of your SHT sensor and bypass it's own code?

any available schematic?

How far your SHT sensor is?

Is your board send the voltage to your sensor?

How? i mean, is there any buffer between your PCB and your sensor? case not, it's one other possibility of noise source.

As i already commented about the SHT obscure code but you said it's working on a single bech... i just want to know what's happen when you bypass this section.

Any PCB layout picture?

[microkam]

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[microkam]

How far your SHT sensor is?
Is your board send the voltage to your sensor?
How? i mean, is there any buffer between your PCB and your sensor? case not, it's one other possibility of noise source.

sht cable sheild length 3m.
sht supplied +5v from my PCB without any buffer,and how can i put this buffer ,can you explain more.

Is it because noise on the line is causing the chip to acknowledge at the wrong time or send garbage

i tracked the problem and i found the problem from noise on the line , i tried to replace the sht cable with short one (0.5m) and the noise is cancled >.

SO . can i run timer on the first sht code and stop it on the end of code , if the timer reached to the maximum time then reset the pic .

Make sure the Battery isn't next to a contactor switcing kVA - the usual things...

should i connect battary to ds1307 , in my pcb i connect battary pin to ground . is this the problem .

[microkam]

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[microkam]

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[microkam]

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