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Aircoookie / WLED

Control WS2812B and many more types of digital RGB LEDs with an ESP8266 or ESP32 over WiFi!
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ESP32-C3 SuperMini gets very hot #4275

Closed SunboX closed 1 week ago

SunboX commented 1 week ago

What happened?

ESP32-C3 get's very hot, you nearly can't touch it anymore after only 10 seconds.

To Reproduce Bug

I flashed the latest WLED [env:esp32c3dev] from today onto a ESP32-C3 SuperMini from here: https://de.aliexpress.com/item/1005006960183178.html

No LEDs were connected at this time.

After doing a search, I came across other users with the same Issue. Flashing ESPHome does not heat it up so much. So it is not related to Wifi usage or the board in general. It must be somehow WLED related - but why?

Expected Behavior

ESP32-C3 gets only warm not burning hot.

Install Method

Self-Compiled

What version of WLED?

WLED 0.14.4 (build 2405180)

Which microcontroller/board are you seeing the problem on?

ESP32-C3

Relevant log/trace output

No response

Anything else?

No, nothing was connected to the board, just USB power. The ESP32 chip itself got hot and also the voltage regulator.

Code of Conduct

DedeHai commented 1 week ago

not a bug, that is just how it is.

SunboX commented 1 week ago

@DedeHai And why doesn't it happen if I install ESPHome?

DedeHai commented 1 week ago

Enable wifi sleep.

SunboX commented 1 week ago

It seems to help a tiny little bit, but still getting very hot.

SunboX commented 1 week ago

Even reducing f_cpu to 80MHz does no change.

softhack007 commented 1 week ago

@SunboX there are small -C3 boards out there which have thermal problems. Maybe you were unlucky to get one.

Some known ways to reduce heat production:

You can't compare esphome with WLED. Esphome basicially reads out a handful of sensors and sends them over to MQTT or HA, maybe drives a handful of outputs at low rates. So in esphome the CPU is idle most of the time, while WLED is actively calculating effects and doing other things that keep the CPU busy = produce heat.

SunboX commented 1 week ago

@softhack007 Thanks for the explanation! That's really sad, the WEMOS D1 Mini (ESP8266) is also low CPU power but does not seem to have those issues. Do you know why?

softhack007 commented 1 week ago

No idea, sorry. 8266 is a completely different CPU.

softhack007 commented 1 week ago

Another idea that might help: Make a custom build with -DARDUINO_USB_CDC_ON_BOOT=0 instead of "=1" which is the default.

We had problems in the past with CDC_ON_BOOT enabled - the driver from espressif sometimes gets into an infinite loop at startup, which heats up the board. Unfortunately without CDC you can't set the wifi credentials in the online installer...

softhack007 commented 1 week ago

Did I mention that -C3 is cheap /useless stuff? Well that's my personal opinion as a developer. If you can, buy -S3 (but not the cheapest superMini) or classic esp32.

SunboX commented 1 week ago

Yes, I know it's cheap, that's the reason why I want to use them. It's for small decorative stuff. I don't need an high end MyC for that. If it's cheap, it's fine. USB Type-C would be nice, because most chargers and cables nowadays have USB Type-C.

DedeHai commented 1 week ago

Reason your WEMOS D1 Mini does not suffer from this: it is roughtly 3x the size. I have C3 supermini's mounted on a just slightly larger carrier PCB and it does not get hot. The main issue is: it was designed to be mounted on a PCB, if not mounted, it will run hot. The temperature is not an issue for the hardware, it can easily take it.