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If the voltage is too low, the unit will not function until the proper voltage is restored.
The minimum voltage required for the unit to work properly is 5V.EDIT: If the firmware doesn’t respond there is little we can do from software side as all code control is gone. I believe you might be referring to an external watchdog of some kind – waiting periodic confirmation from uC that all is ok. If such confirmations are missing over a given time, it would flush the unit’s power to reboot.
This would make sense, but making PCB modifications at this stage is not exactly easy. The current design has been verified for quite some time before readying it for production. So it all goes back to the question: is this something necessary? I was unable to replicate the scenario. In all my tests, if something went wrong, after 5 minutes the units rebooted to normal state (quite a different story before this mechanism was implemented – 2years ago).Yet if this is something that happens and it happens often, than I believe we should look for solutions.
hi Vinz!
Great to hear that. Let’s discuss the proper formatting and the JSON issue here if you wish.
You’ve indicated the minimum content for a valid HTML5 format:
<!doctype html><html lang=en> <head><meta charset=utf-8><title>blah</title></head> <body><p>I'm the content</p></body></html>I agree, but we have a big problem: memory (RAM).
uRADMonitor model A uses the mega328p, which has a total of 2KB RAM. There is also 1KB of EEPROM (where HTML static text like the one you’ve indicated could be stored).BUT,
To send data over Ethernet we need to maintain a buffer. This is already 400bytes long (consuming almost a quarter of all available memory). Adding the doctype, the head, any metas, the title, body or any other formatting would consume precious memory, a total of 125Bytes that we don’t have (hashing, RSA, etc will eat any free memory, and we need those to secure comm links)
So the best bet might be to go with absolute minimum, letting the browsers go for default.What do you think?
Regarding the JSON:
Þ¿ýòü|ó¿s¿ ßó;÷ ö }‘° ß¿V{ï{ŽÿÝõ«þ‰~Ë~‘í Gó$cŸ½—Ýÿ ;úÝ —ß ne¿ û ß+ÖÓÿžóÄfÛã^û çùú± ýÀ"type":"1","detector":"SBM-20","cpm":18,"temperature":0.31,"uptime": 2463}}What browser did you use? Do you see it in all browsers you have at hand?
(I tried in two and didn’t see this issue, so we need to see where this is coming from).Also with your spoofed DNS, I’m curious what do you see under Server IP in the embedded web-page?
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. Reason: html issues
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We can go for whatever option suits you best, but changing the firmware is not a complicated thing. You need a programmer like indicated by me or Mike in this topic, and the software. This takes max. 10minutes . Shipping it back and forth will take 1-2 months.
EDIT: Btw, I am writing an article on the blog to provide some instructions on how to update the firmware. Photos and step-by-step instructions, it should be ready the next few hours.
Indeed the crystal needs to be replaced, as a quick fix to get the unit back online.
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