<![CDATA[Core2 resets when recoding from build in microphone]]>I recently bought the core2 because it has a build in mic, speaker and much more. Great!

But I can't get the mic to work in UIflow (online and app) or Arduino IDE. Both the most recent version.

Even the most basic Blocky makes the Core2 reset when running it.
0_1679585223920_8421186e-9b42-44c3-80de-974b43a269b9-image.png
It does create a audio file, in my case 'test.wav', but it is 0 bites. Also if i save it to the SD card.

The mic is working correctly because the factory test works fine.

I also own a M5stickC-plus (a few). In UIflow there is no mic option, but it workes fine in Adruino IDE.

So, what is going on? It seems to be a serious problem for years now, but why is nobody doing something about it?

I bought it because if the mic and speaker.

Please help me!

]]>https://community.m5stack.com/topic/5150/core2-resets-when-recoding-from-build-in-microphoneRSS for NodeWed, 29 Apr 2026 09:40:27 GMTThu, 23 Mar 2023 15:37:18 GMT60<![CDATA[Reply to Core2 resets when recoding from build in microphone on Fri, 04 Aug 2023 11:18:52 GMT]]>I just tried to record a simple .wav file via the built in microphone on my core2 with the M5Go Bottom2 using the blocky 'record to file' block. I am using UI flow 1.12.2 on my core2 and yes it does record and I can play the .wav file back but even at max volume of 6 the sound is very faint.

]]>https://community.m5stack.com/post/21787https://community.m5stack.com/post/21787Fri, 04 Aug 2023 11:18:52 GMT<![CDATA[Reply to Core2 resets when recoding from build in microphone on Wed, 02 Aug 2023 03:44:16 GMT]]>@Remco @giftedfinance @djh82uk bug is fixed and the next firmware version 1.12.2 is supported

]]>https://community.m5stack.com/post/21754https://community.m5stack.com/post/21754Wed, 02 Aug 2023 03:44:16 GMT<![CDATA[Reply to Core2 resets when recoding from build in microphone on Tue, 06 Jun 2023 06:44:28 GMT]]>With the Core 2's microphone, I discovered the identical problem. My SD card does receive a created audio file, but it contains 0 bites. And sure, the Core 2 crashes and restarts when using this straightforward Blocky record method.

I recently bought the core2 because it has a build in mic, speaker and much more. Great!

But I can't get the mic to work in UIflow (online and app) or Arduino IDE. Both the most recent version.

Even the most basic Blocky makes the Core2 reset when running it.
0_1679585223920_8421186e-9b42-44c3-80de-974b43a269b9-image.png
It does create a audio file, in my case 'test.wav', but it is 0 bites. Also if i save it to the SD card.

The mic is working correctly because the factory test works fine.

I also own a M5stickC-plus (a few). In UIflow there is no mic option, but it workes fine in Adruino IDE.

So, what is going on? It seems to be a serious problem for years now, but why is nobody doing something about it?

I bought it because if the mic and speaker. https://community.m5stack.com/bubble shooter/post/15992

Please help me!

]]>https://community.m5stack.com/post/21108https://community.m5stack.com/post/21108Tue, 06 Jun 2023 06:44:28 GMT<![CDATA[Reply to Core2 resets when recoding from build in microphone on Sun, 04 Jun 2023 08:36:55 GMT]]>Hello @m5stack team

I can confirm that trying to record (a 1 second long wav) from the microphone to SD card on an M5Core2 using UIFlow 1.11.8 fails and crashes the M5Core2 with the following error in the debug log:

[0;31mE (259807) I2S: Error malloc dma buffer␛[0m
/home/m5/M5-Workspace/esp-idf-for-m5/components/freertos/queue.c:1802 (vQueueDelete)- assert failed!

Thanks
Felix

]]>https://community.m5stack.com/post/21078https://community.m5stack.com/post/21078Sun, 04 Jun 2023 08:36:55 GMT<![CDATA[Reply to Core2 resets when recoding from build in microphone on Sun, 04 Jun 2023 03:11:23 GMT]]>@kombistack Damn, just stumbled into this issue also. I'm guessing there is still no fix?

]]>https://community.m5stack.com/post/21076https://community.m5stack.com/post/21076Sun, 04 Jun 2023 03:11:23 GMT<![CDATA[Reply to Core2 resets when recoding from build in microphone on Fri, 07 Apr 2023 04:20:46 GMT]]>Yes Remco I have found the same issue with the microphone on the Core 2.
It does create an audio file to my SD card but it is 0 bites.
And yes this simple Blocky record function makes the Core 2 crash and restart.

]]>https://community.m5stack.com/post/20542https://community.m5stack.com/post/20542Fri, 07 Apr 2023 04:20:46 GMT