kuba2k2
commented
1 year ago After you ensure that BK7231N is the correct chip (T and N are different - cloudcutter will not check if you're flashing the wrong file, and the device will be bricked) you can flash the firmware with cloudcutter.
It will show up as an AccessPoint to which you can connect. A configuration page should pop up, where you enter your wifi credentials.
Next, find the IP of your device (either via your router page or some network scanning application) and go to its website (http://kickstart-bk7231n.local/ should also work). The ESPHome dashboard will show up.
Then you can run the HTTP requests. The offset is 0x1E0000 until 0x200000 (which is 64 KiB in total) but it has to be converted to decimal (the URL will not accept hex, for now). As I mentioned, the reading procedure is not very stable. I have been able to get it to read 16 KiB at a time with no issues, sometimes even 128 KiB, still YMMV. You may need to do it in few steps, i.e. read 16384 bytes each time (or more/less). Always note which offset is the downloaded file from.
These files will not give you the stock firmware (impossible) but can be used to extract schema using bk7231tools. You can then attach them here and we will know what to do.
dasb00ter
I am trying to dump the firmware for Device model number: 35798 Globe Electric A19 lightbulb (very common at costco in Canada)
In order to submit the information so that ESPhome can be flashed to it. @kuba2k2 gave some information to get me started but I cant find any directions for this anywhere. I have downloaded https://github.com/libretiny-eu/esphome-kickstart/releases/download/v23.04.28/image_bk7231n_app.ota.ug.bin placed it in the custom firmware folder of cloudcutter but before I proceeded I wondered if there was anything I needed to do?
Also a http command was mentioned I am guessing to read particular information from the firmware at certain offsets. How do I go about ascertaining the offsets?