Hi Yuriy,

It looks like the flash mode & flash size bytes of the encrypted image have been written as plaintext values. This shouldn't happen, and it may be a bug in the tool you used to flash. What tool and options did you use to write bootloader-encrypted.bin?

I write the firmware and bootloader, in the terminal I see how the bootloader encrypts the memory. Next, I overwrite the firmware file and the table file in encrypted form. Everything is working. To encrypt the bootloader file, I use the command $python /home/osboxes/esp/esp-idf/components/esptool_...

Hi I have a small question about rewriting the bootloader. So I use the pregenerated key, I quietly encrypt and rewrite the firmware. But I can not re-write the bootloader, even in encrypted form. Why can not I overwrite the bootloader with an encrypted file? If you don't have secure boot enabled, ...

I'll check with my colleagues if this is possible. The complexity is that there is an entire TCP/IP stack between your code which sends a UDP packets and the WiFi driver transmit buffers. At any time the TCP/IP stack may have to respond to a DHCP packet, or an ARP packet, or an ICMP packet, or some ...

Hi Gaoqianjin, There's a limit to the number of buffers available in the WiFi driver to transmit frames. Because each WiFi frame has to be ACKed at the RF layer, and because WiFi is a shared medium with mixed signal quality at times, there can be delays which cause this buffer to back up. You can tu...

Hi vs_pedro, The intermittent issues you have certainly point to something with hardware. Either power supply integrity, or signal integrity for the serial lines. Suggest double-checking all connections for signal, power, and grounds. A couple of additional questions: - Is anything connected to GPIO...

ESP_Angus, The very best thing you can do is use a "protected" Lithium battery I didn't mention it but the lithium battery is not a rechargeable battery. If it's very "spikey", maybe look into using shorter/thicker wires between the battery and the circuit it's powering The traces are 20 mil wide o...

Hi Alekos, I've replied to a few points below inline. Hopefully this will help explain the situation. You can also find some supporting information in the docs here: http://esp-idf.readthedocs.io/en/latest/api-reference/system/mem_alloc.html http://esp-idf.readthedocs.io/en/latest/api-guides/general...

v3.0 is in final regression testing, there shouldn't be any more significant changes before the final release. I'd suggest using the release/v3.0 branch now (which is a long way ahead of the v3.0-rc1 tag, as you've noted). This branch will become the final release soon, and you can fast-forward it t...

Hi jerry, The very best thing you can do is use a "protected" Lithium battery (or add a lithium cell protection chip to the circuit you have). This will cut the battery off from the circuit when it reaches a low voltage threshold (usually 3.0V), and reintroduce it to the circuit when it charges back...