Receive serial data

[skimask]

The recorded temperatures from the logger are between 0 and 160ºC.

1 degree granularity (i.e. 10C 11C) or less than that (i.e. 10.2C 11.547381223430947C)?

[ruijc]

Just 1 degree granularity 10, 11, etc

.

[skimask]

Just 1 degree granularity 10, 11, etc

Well, if it was me, and I wanted close to 100% assurance that my data was good, I guess I'd go a little bit crazy and do something like have a 'packet' of X number of bytes, each packet for one temperature reading for each 'location'...

packet start ID (example of $FF)
address X.lowbyte
address X.highbyte
data byte
same data byte (inverted)
address X.highbyte (inverted)
address X.lowbyte (inverted)
packet end ID ($00, which is the packet start ID inverted)

So, I'd end up with an 8 byte packet, everything is sent, then it's all sent again but inverted at the bit level. The packet start ID might be an $FF (because the temp's will never be that high), the addresses might be that high, but if you got that then the packet end ID wouldn't match up.
It's a bit overkill, but I don't see why it would work. And really, I think I'd trust my wiring enough to just send a couple of $FF's as a start marker, then the whole recorded memory from start to finish, maybe with a couple of $FF's as an end marker.
It's all up to you. You get to make RSP... ruijc's serial protocol.

[ruijc]

Thanks Skimask,

Well, if it was me, and I wanted close to 100% assurance that my data was good

I agree. Me also.

It makes perfect sense.

The reason i'm with this system it's because it was simple to build and simple to transfer the data to the PC using a freeware RS232 logger software. I just dump the values to it with the format i have showned ( one temp value per line ) saving them in a txt file and then just import to excel and generate the graphs.

The reason i'm asking how to do this with this system is that this way i can maintain my logger as is and just need to build the module with LCD to view the data "on site".

I cannot re-program the logger because it's encapsulated with resin to reduce size and weight.

If it could be done i was more than half way there to complete the module

Thanks

[amgen]

sorry, didn't read last post

[ruijc]

Any idea how to collect the data ? anyone ?

.

[mackrackit]

I have not tried it, but could you use 10 or 13 for the wait character and then store the data.