ESP32 life-time

svenbieg
Posts: 10
Joined: Tue Feb 11, 2020 5:48 pm

ESP32 life-time

Postby svenbieg » Fri Feb 19, 2021 10:32 pm

My ESP32-chips only last half a year. I did reduce frequency form 240 MHz to 160 MHz already. I'm using it for a thermal solar control and this is my fourth chip already.
Last edited by svenbieg on Sat Feb 20, 2021 6:51 pm, edited 5 times in total.

WiFive
Posts: 3091
Joined: Tue Dec 01, 2015 7:35 am

Re: Long live

Postby WiFive » Fri Feb 19, 2021 10:53 pm

Sounds bad, but not enough information to know whether to blame the chips or the supporting circuitry or operating conditions.

ESP_Sprite
Posts: 4426
Joined: Thu Nov 26, 2015 4:08 am

Re: Long live

Postby ESP_Sprite » Sat Feb 20, 2021 1:36 am

+1, I'm curious what you're doing with them. Anecdotally, I have ESP32s in use for way longer than that and they still work fine.

svenbieg
Posts: 10
Joined: Tue Feb 11, 2020 5:48 pm

Re: Long live

Postby svenbieg » Sat Feb 20, 2021 9:08 am

What am i doing wrong? I have 5 analog Inputs and a driver for the relais, some RGB-Leds and a display. The voltage is regulated by an LD33V. The controller is inside of the house, there are always about 20°C. Everything works fine for months.

ESP_Sprite
Posts: 4426
Joined: Thu Nov 26, 2015 4:08 am

Re: Long live

Postby ESP_Sprite » Sat Feb 20, 2021 9:51 am

How exactly does it fail when it fails? Do you have a schematic? Especially with a relais or external analog inputs, high-voltage spikes could play a role here.

svenbieg
Posts: 10
Joined: Tue Feb 11, 2020 5:48 pm

Re: Long live

Postby svenbieg » Sat Feb 20, 2021 12:37 pm

I'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.

svenbieg
Posts: 10
Joined: Tue Feb 11, 2020 5:48 pm

Re: Long live

Postby svenbieg » Sat Feb 20, 2021 12:46 pm

ESP_Sprite wrote:
Sat Feb 20, 2021 9:51 am
How exactly does it fail when it fails? Do you have a schematic? Especially with a relais or external analog inputs, high-voltage spikes could play a role here.
The first chip hung up and restarted after few seconds, so i reduced the frequency. The second chip was my fault, i erased flash too often. Last time the chip didn't drive the LEDs anymore after few weeks.

ESP_Sprite
Posts: 4426
Joined: Thu Nov 26, 2015 4:08 am

Re: ESP32 life-time

Postby ESP_Sprite » Mon Feb 22, 2021 2:19 am

Strange. Without a proper schematics, there's nothing I can say about why it died, but our chips have been designed to work for years and years and them dying after such a short time certainly isn't something that commonly happens.

ESP_Angus
Posts: 2282
Joined: Sun May 08, 2016 4:11 am

Re: Long live

Postby ESP_Angus » Mon Feb 22, 2021 3:10 am

svenbieg wrote:
Sat Feb 20, 2021 12:46 pm
ESP_Sprite wrote:
Sat Feb 20, 2021 9:51 am
How exactly does it fail when it fails? Do you have a schematic? Especially with a relais or external analog inputs, high-voltage spikes could play a role here.
The first chip hung up and restarted after few seconds, so i reduced the frequency. The second chip was my fault, i erased flash too often. Last time the chip didn't drive the LEDs anymore after few weeks.
Just to check I understand: the first chip stopped working at 240MHz but can work at 160MHz still? That's quite odd!

Regarding "erased flash too often", are we talking >100,000 erase cycles here?

svenbieg
Posts: 10
Joined: Tue Feb 11, 2020 5:48 pm

Re: ESP32 life-time

Postby svenbieg » Tue Feb 23, 2021 7:15 pm

No, the first chip doesn't work anymore. I reduced frequency on the second chip. Your chip was designed to work many years, but is anyone out there who has chips working that long?
Last edited by svenbieg on Tue Feb 23, 2021 7:26 pm, edited 2 times in total.

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