Matrix Voice ESP32 constant rebooting

I just received a new Matrix Voice ESP32. I have snips working ok with the rpi, but when I try to flash the ESP32, it never completes a boot. Here is the dump:
Rebooting…
I (12) boot: ESP-IDF v4.0-dev-459-gba1ff1692 2nd stage bootloader
I (12) boot: compile time 11:07:17
I (12) boot: Enabling RNG early entropy source…
I (17) boot: SPI Speed : 40MHz
I (21) boot: SPI Mode : DIO
I (25) boot: SPI Flash Size : 4MB
I (29) boot: Partition Table:
I (33) boot: ## Label Usage Type ST Offset Length
I (40) boot: 0 nvs WiFi data 01 02 00009000 00004000
I (47) boot: 1 otadata OTA data 01 00 0000d000 00002000
I (55) boot: 2 phy_init RF data 01 01 0000f000 00001000
I (62) boot: 3 factory factory app 00 00 00010000 00100000
I (70) boot: 4 ota_0 OTA app 00 10 00110000 00100000
I (77) boot: 5 ota_1 OTA app 00 11 00210000 00100000
I (85) boot: End of partition table
I (89) boot: Defaulting to factory image
I (94) esp_image: segment 0: paddr=0x00010020 vaddr=0x3f400020 size=0x31c30 (20p
I (174) esp_image: segment 1: paddr=0x00041c58 vaddr=0x3ffbdb60 size=0x03558 ( d
I (180) esp_image: segment 2: paddr=0x000451b8 vaddr=0x40080000 size=0x00400 ( d
I (181) esp_image: segment 3: paddr=0x000455c0 vaddr=0x40080400 size=0x0aa50 ( d
I (208) esp_image: segment 4: paddr=0x00050018 vaddr=0x400d0018 size=0xa0dac (6p
I (439) esp_image: segment 5: paddr=0x000f0dcc vaddr=0x4008ae50 size=0x09584 ( d
I (467) boot: Loaded app from partition at offset 0x10000
I (467) boot: Disabling RNG early entropy source…
Guru Meditation Error: Core 0 panic’ed (LoadProhibited). Exception was unhandl.
Core 0 register dump:
PC : 0x4016db33 PS : 0x00060730 A0 : 0x8012c18b A1 : 0x3
A2 : 0x00000000 A3 : 0x000000fe A4 : 0x00000001 A5 : 0x0
A6 : 0x00000000 A7 : 0x00000000 A8 : 0x8012bcb1 A9 : 0x3
A10 : 0x00000020 A11 : 0x4012b86c A12 : 0x3ffe3ae8 A13 : 0x0
A14 : 0x00000000 A15 : 0x00000000 SAR : 0x0000001b EXCCAUSE: 0x0
EXCVADDR: 0x00000000 LBEG : 0x4000c46c LEND : 0x4000c477 LCOUNT : 0x0

Backtrace: 0x4016db33:0x3ffe3b00 0x4012c188:0x3ffe3b20 0x400d1c01:0x3ffe3b50 0x0

Appears to be trying to load from address 0.

I suggest cloning this repo:

Then, put the backtrace line in a file dump.txt en execute the following line in the Decoder folder:
python decoder.py -p ESP32 -t ~/.platformio/packages/toolchain-xtensa32 -e <path_to>firmware.elf -f dump.txt

Where you should change <path_to> to where the elf file is you want to debug. Assuming you also have the toolchain installed in ~/.platformio/packages/toolchain-xtensa32

Hey @greypanda,

Welcome to the community!

Did you follow this guide to first flash your ESP32?

Best,
Samreen

Exactly. I’m going to replace my desktop computer tomorrow, so
I’ll try again then.

Hi,
i received my MatrixVoice this week an i have the same issue like
‘greypanda’.
I have executed every step from your guide https://matrix-io.github.io/matrix-documentation/matrix-voice/esp32/ and the Matrix Voice is still in the boot loop.

I have some other boards wit the ESP32 and have no problems with them.

Best Regards
Igor

@ivo,

I will test this and see. Unexpected errors can occur if there have been updates to the Espressif libraries.

We are at a conference this week so I will get back to you by the end of the week.

Best,
Samreen

In the file platformio.ini change this line:

platform = espressif32

to

platform = espressif32@1.9.0

I also noticed an issue with a newer framework, see my file here:

1 Like

@Romkabouter Tank you!

I have compiled two different programs with the ‘espressif32@1.9.0’ setting and it doesn’t work. It still comes to the boot loop. Does the Rasbian version play a role? I am using Rasbian Buster

Unfortunately it doesn’t work with Rasbian Stretch either. I can’t even get a simple “Hello World” running. Could it be that my Matrix Voice is damaged?

I’ve solved the problem.

Setting the platform to ‘espressif32@1.9.0’ and update the pio libs with
pio update
pio lib update

Now my MatrixVoice is running:grinning:

@Romkabouter Tank you!

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