New HM 4.0 setting help


 
would a bad atmega chip make this happen, when i re-image the sd card it is holding the names of the probe so i don't think that it is re flashing the atmega chip
is this right

thanks for the help
 
I'm doubting the ATmega is actually bad, but who knows. I would first suspect poor solder connection(s) on the ATmega socket cause I had that issue on my first build and my mega wouldn't flash. The HM is a two layer board and so solder needs to flow from the bottom of the board to the top to complete some circuits, you wouldn't be the first to have issues because the mega socket wasn't soldered up well... Look for the gold traces on the TOP side of the board (under the chip socket) to turn from gold to silver solder.. (remove the chip before you solder)
 
The HeaterMeter configuration is stored on the HeaterMeter so it is completely separate from the SD card. Even flashing new "AVR Firmware" keeps the configuration.

If you haven't already, reflash the AVR Firmware -> Bundled -> hm.hex. I'd then suggest you do a "Reset configuration" using the LCD and button on the device but if your LCD doesn't work you can't navigate the menus so good luck with that :-D
 
Maybe that would be a good feature. Keep the button held to the left for 15+ seconds and the HM would do a full reset.
 
11 steps to the right with the HM button gets you to the reset config page, one step up changes no to YES....
Looking at the menu's on the LCD raises another question I have never asked, how do you choose the probe types on a stand alone HM without the rPi and web interface?
 
Is the only the file the needs to be on the sd card "openwrt-brcm2708-sdcard-vfat-ext4.img"

or am i missing something
 
yah, that's about it, that image is unpacked to the SD Card and that is all you need to do to get a HM up and running...
Like Bryan said, it sounds like your rPi isn't communicating with your HM, or the communication isnt making it from the HM board to the ATmega...
 
i got a new atmega chip and it won't load the config page, but the old on i have will load the config page, i guess i may have some cold solder jionts
 
Nick L said:
different mega same hm
Click to expand...

Well, that is odd indeed. It would seem if one mega works/flashes in the HM board but the second doesn't that rules out bad solder joints and would point to a defective second mega. Are you sure you don't have a bent pin that isn't getting into the socket?
 
i have two more that i have tried, it doesn't even let me update the avr

does anyone are here look at or fix or sell working?
 
So let me get this straight, you have a fully functioning Heater Meter, you also have 3 additional ATmega's, when you install any of the three mega's into the working HM none of them will flash? Do I have that correct?
 
the one will update everything but the probes just puts the preset on the A line and won't save, the other two won't flash
 
I kinda have a hard time understanding your writing precisely, I still dont know if your HM is 100% FUNCTIONAL with ANY of the megas?
 
with one of the atmega in i can get to the config page the other two i can't
so the one atmega is flashed just won't save the presets, the other two won't flash
 
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I guess you REALLY don't want to answer my direct question.... Is your HM FULLY FUNCTIONAL with ANY of the megas installed? Pretty simple question really, if you want someone to help you'll have to provide good clear information on what is going on...

My guess is the answer is NO, in which case I would tell you that there is likely a problem on your HM board, most likely a bad solder joint or solder bridge somewhere. The fact that one mega flashed may be a fluke, and as far as I can tell that one isn't working 100% either (if it is the one that wont save the probe data) so it may have not flashed properly either. A flaky solder joint would certainly explain why one mega flashed or partially flashed and others wont, or why you can't communicate with the mega fully to save settings. Can't really tell from what you are telling me but I would guess at bad solder joints....
 
I had a rocky start on my first HM build, the mega wouldnt flash, it was bad solder joints. I had to fix the soldering then manually force the HM to flash the mega. On HM releases since then Bryan has made a change that SHOULD force the flash of any mega it detects is not flashed, so you should not have to go through the manual flashing as I did. I posted about the experience and how I got mine working here, perhaps give it a read, it may help you.
 
here is the full configuration url you can see that it doesn't save any of the presets, what should this look like


User root setting 18 values...
pidb to 4 = OK
al to -40,-200,-1,-1,-1,-1,-1,-1 = OK
pn0 to Smoker = OK
pidp to 3 = OK
pc2 to ,,,,1 = OK
sp to 235 = OK
pc1 to ,,,,1 = OK
pidd to 5 = OK
ld to 0,225 = OK
lb to 0,3,9,12,11 = OK
pidi to 0.005 = OK
po to -1,-1,-1,0 = OK
pc0 to 0.00023067431,,,,1 = OK
pn2 to Meat 4 = OK
pn3 to Ambient = OK
fn to 10,70,60,250,0 = OK
pc3 to ,,,,1 = OK
pn1 to Meat = OK
Done!
 
RalphTrimble said:
I guess you REALLY don't want to answer my direct question.... Is your HM FULLY FUNCTIONAL with ANY of the megas installed? Pretty simple question really, if you want someone to help you'll have to provide good clear information on what is going on....
Click to expand...

Thanks for the help, no i do have an HM the works with any of the atmega's i am read that post i will go back and and solder the whole board again
 
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