Yes, i did save the temperature-curves every minute erasing flash-sectors. The chip did still work, only the curves were gone after about half a year, that means about 100.000 write-cycles like in the specs. This was my fault, like i said. I'm going to use the DevkitC this year, i can post an update when it stops working.
ESP32 life-time
Re: Long live
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Re: ESP32 life-time
Hi,svenbieg wrote: ↑Sat Feb 20, 2021 12:37 pmI'm using a voltage divider with the 3.3V supply-voltage, the relais are driven with 5V by an ULN2003. I just wanted to know if this a known problem of the ESP32. I'm going to try the DevkitC, maybe the chip got too hot when i was soldering it on the adapter.
Are you using the chip itself (i.e ESP32-D0WD) or a module (i.e ESP32-WROM)? If it's the chip, did you reflow it manually with a hot air station for a long time in high temperature?
For this kind of problem, we can't help a lot without any detailed information about your circuit and the environment that it's connected.
Things that you can check:
- Power supply quality/noise
- Voltage spikes on the analog side
- Relay protection/noise (should measure the 3V3 rails while switching the relays)
Re: ESP32 life-time
I don't get spikes on the analog-pins, it is a simple voltage divider with 3.3V supply voltage. And the relais are driven with 5V. If the supply voltage would drop the chip would restart immediatly. I think the soldering maybe the problem, i put a WROOM-SoC on an adapter with a soldering Iron. Thank You for Your reply, good to know that it is my fault!
Re: ESP32 life-time
I'm now using the DevKitC v4 but the ESP32 still doesn't work over half a year. I don't think i got over-voltage because the chip wouldn't work that long then. I'm using a usual 5V smart-phone charger. Maybe there is a difference where i order the DevKit? Is there anybody having the same problem? The ferrite bead seems to be a good idea. The original controller had problems too, maybe it's the 230V power supply. I'm going to try this next!
Re: Long live
Not a known problem. Are these custom boards that you hand solder the ESP32 on yourself?
Sounds like a good plan for a good reason.
Last edited by mbratch on Mon Jul 26, 2021 7:58 pm, edited 1 time in total.
Re: ESP32 life-time
I have an esp8266 that's been running for 4y straight now, no issues. I don't think it's the chip failing. Much more likely you're doing something incorrect.
Re: Long live
Increase the flash lifetime by using some form of wear leveling - either automatically by using SPIFFS/FAT32 or implement a simple flash-based circular buffer.svenbieg wrote: ↑Tue Feb 23, 2021 7:22 pmYes, i did save the temperature-curves every minute erasing flash-sectors. The chip did still work, only the curves were gone after about half a year, that means about 100.000 write-cycles like in the specs. This was my fault, like i said. I'm going to use the DevkitC this year, i can post an update when it stops working.
Re: ESP32 life-time
My program was running in an endless-loop with no delay, so the CPU-load was 100% all the time. Maybe this caused the problem.
Re: Long live
Wait what? If I understand you corectly:
You have 5V supply, and you use a voltage divider to supply the ESP with 3.3V?
That would be an absolute NO-GO.
But then again, maybee I understand you incorrectly.
As others have noted, a schematic would help us to help you.
If your hardware is OKE, it should be inpossible to kill the chip using software. The thing should be able to handle 100% cpu load for a very long time.
Re: ESP32 life-time
You did not read correctly. I'm using the voltage-divider for the Pt1000. As supply i have a standard contstant voltage-regulator. I had the same problem when using the DevKitC, looks like it is the software.
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