The app does not have to enable JTAG, but it can disable it by configuring the GPIOs the JTAG port uses as something else. You indeed seem to be pretty close... but it looks like there's too much capacitance or something in your cables. Can you run JTAG slower? Normally, I think OpenOCD does that wi...

For now, external SRAM is only really usable by either using it as a generic external SPI device or by using a SPI channel with DMA to essentially copy data to or from it. In theory, we also have a way to map 4MB of SRAM into into the D-bus (so you can basically use it in the same way as you can use...

The problem with this function is that it uses an idle-loop, that is, it actively polls for a character to appear. That basically hangs up the rest of the SDK.

While it's not really tested (...reminding me, I should add -j to my own make sessions as well), being able to parallel build esp-idf was a feature we had in mind when we designed it. If you ever do find an error in it, please file a Github issue and we'll try to resolve it.

The flash layout is only constrained by a few things, mostly the ROM and the bootloader. The ROM has these constraints: The first 4K of flash is reserved for secure-boot purposes. The very first program in flash (normally the 2nd bootloader) should start at 0x1000 and be in the app format the ROM bo...

For your information, the week of 2 to 7 October is a holiday in China. Some Espressif employees will still be browsing the forums every now and then, but responses may be delayed until after the holiday.

Yes, there are. The app team is adding drivers to esp-idf which are more highlevel and multi-thread compatible where it makes sense. SPI and I2C drivers will also arrive in esp-idf in due time.

As far as I am aware, LWIP is capable of simultaneous IPv4 and IPv6 operation. LWIP is included as source code in esp-idf, so it should be possible to replace it with something else. I can't comment on the ease with which you'd be able to do that, though.

LWIP actually already supports IPv6; at the moment, it's just the DHCP bit (server as well as client) that aren't IPv6-compatible yet. Support for complete IPv6 is planned, but unfortunately I can't tell you the timeframe on that.

Hmm, interesting point. I'll see if I can take it along in the development process of the partition API.