Fatal Exception(28) about esp-homekit

[maximkulkin]

It looks like you're using some old version of esp-homekit. You need to update your version and rebuild firmware.

[zach-ovic]

I have a clone of this repository and git pull says it's up to date. I even did git submodule update --recursive but nothing. Am I doing something wrong?

[carmanuelz]

I have de same error when exect make -C examples/led all :

Fatal exception (28):
epc1=0x4000228b, epc2=0x00000000, epc3=0x00000000, excvaddr=0x000000b5, depc=0x00000000

I did git submodule update --recursive.

[maccoylton]

Make sure you pull the every latest version of both esp-open-rtos and esp-HomeKit, both have improvements in memory management.

From what I’ve seen above message tends to be running out of heap space or your code trying to access a piece of memory it shouldn’t.

If you are running one of the demo’s unmodified then it will likely be the former.

BTW what chip are you compiling for ?

[carmanuelz]

I'm using ESP-8266 on this devkit:

[maccoylton]

That model only has 1M of Flash according to this:- https://www.aliexpress.com/store/product/Official-DOIT-New-Version-1pcs-ESP-12N-Serial-Wireless-WiFi-Transmission-Module-Fully-Compatible-with-ESP8266/636052_32812237494.html

To build for this, you need to change SPIFLASH_BASE_ADDRESS see discussion here:- maximkulkin/esp-homekit-demo#5

[zach-ovic]

Ok, great. I think that we are getting somewhere with the flash size. Is it somehow possible to use some tool (probably esptool.py) to get flash size of currently connected chip? Sorry not to google it my self. But I'm on vacation and internet connection sucks here. But at the same time I don't want this discussion to die :)

[carmanuelz]

I solved the problem by adding a flag in the build process:
make -C examples/led all HOMEKIT_SPI_FLASH_BASE_ADDR=0x7A000
and in the make command to flashing
make flash FLASH_MODE=dout FLASH_SIZE=4
now it works correctly.
the model of my devkit is nodemcu 1.0 (esp-12e)
This model has flash size 4M (1M SPIFFS)