pi connection woes


 
J

Jeremy_Pickett

New member
hello there!

I would like to join the club of a successful build of a heatermeter-4.3! yesss!

I started this project originally as I had a morbid fear of soldering - turns out soldering is fun and nothing to be afraid of (and youtube helped a lot)

So everything is going lovely, until ... I tried putting the circuit boards into my case and things started going a little awry... Here's the story so far:

Everything assembled, flashed, and all probe plugs worked, as well as the thermocouple tested
ohxOGWL.jpg


Sequence of events is a little hazy at this point as I was doing victory laps. I believe it started looking like the below picture after i unplugged, and tried installing into my printed case:
VwhllI5.jpg


So i unplugged and plugged a few times and at one point the rasp-Pi got very hot ... #gulp.

Reflashed sdcard and tried starting from scratch with the firmware - no love and LCD now shines brightly, but no symbols.

I did some research on the forum and found this:
https://tvwbb.com/showthread.php?74562-Hm-first-powerup-screen-displaying-gibrish&

So i disassembled and reflowed LCD header, the shift register IC and the headers.

I assembled everything and it looks like so with the rasp-Pi plugged in (the left button changes the LED's though - so I think it's working, just nothing showing on screen):
PlGFQe2.jpg


Buuuut, it looks like this when I have the Pi unplugged, and all plugs, buttons, etc, work again:
AiEidG7.jpg


So I guess my question would be where to go next from the information I have? it would seem connecting the rasp-Pi stops things from working so well.
On top of all this the wifi doesn't seem to connect to my network - but i believe that is either related to the above problem, or a problem for another day :D

Any tips hugely appreciated of course and I'm more than happy to provide more info!

In the mean time, i will keep searching the forums and seeing what I can find. I will also try flashing something else onto the rasp-Pi to see if it's toast after it got hot

Many thanks,
Jeremy


____

high-res photos (including each board and solder work):
https://i.imgur.com/1Wsz3rp.jpg
https://i.imgur.com/xMoh7wO.jpg
https://i.imgur.com/suQ2Rlq.jpg
https://i.imgur.com/l6lnFdx.jpg
https://i.imgur.com/kOJWwIU.jpg
https://i.imgur.com/oP7WArF.jpg
https://i.imgur.com/Kg18it6.jpg
https://i.imgur.com/cdCThTW.jpg
 
okey doke, some further testing (sick of me yet? :rolleyes: )

it looks like I might have done what a fellow did on here (cant find the link now) and plonked two metal parts together that i shouldn't have (possibly on the USB ports of the Pi). In doing this i fried my Pi - doh! I confirmed this by trying to load other images I've done (octopi) without any luck - it just boots up, shows some text, and then shuts down.

I will also place some tape over the USB ports of the pi as per this thread:
https://tvwbb.com/showthread.php?70058-Raspberry-PI-3-Overheating&

my symptoms seem to be the same as this:
https://tvwbb.com/showthread.php?73648-Pi-header-plugged-in-wrong-No-LCD-with-Pi/page3

And so doing some continuity tests on the rPi header and it looks like I have continuity between RX and TX - this doesn't seem correct?
These two:
bJErdi9.jpg


thank you for reading my verbal diarrhoea :D
 
aaand that was it

replaced the rPi GPIO header, replaced the raspberry-pi and ... boom!* Great success!

this forum is a wealth of knowledge - basically every problem i hit, someone else has hit before and has been answered all lovely-like.

now my mission is to put it into the case without frying it :P

thanks to all you meaty hobbyists!



l1Hm1Yq.jpg


78fYT8U.jpg




* not an actual boom
 
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