Do the ESP32-WROOM-32 (and -32D & -32U) modules all support the qio/80Mhz flash mode and speed? I'm not seeing any info about that in the datasheets.

I'd like to build a simple command-line based debugging/hacking/tweaking tool to inspect and modify variables while a sketch is running into many of my sketches. My goal with this is to be able to connect to running systems and tweak some settings in real-time or see what state they're in. Similar t...

I'd like to build a secure serial commandline into my esp32 projects but am a bit stuck with the protocol. Ideally I would set-up an SSH server on the esp32 and use that. The two options I've found so far for doing that are to use WolfSSH or to use libssh. WolfSSH uses its own WolfSSL crypto library...

This sounds very interesting, do you have any docs that explain how it works, or do I have the reverse-engineer from source code for that?

LiPo = Lithium Polymer, basically same chemistry as Li-Ion and 4.2V charge, so quite a bit out of spec. An esp32 won't instantaneously combust at 4.2V, but that's past my comfort zone... LiFePO4 is a different checmistry and charges to 3.6V, so OK, but capacity is quite a bit lower for the same volu...

I haven't looked these switching regulators up, but in general their quiescent current is higher than that of linear regulators and if you're regulating down from a LiPo the voltage drop isn't all that big, thus LDO has little/no performance disadvantage when the esp32 is active but a big advantage ...

Thanks for the suggestions! :-) The arduino start-up doesn't add anything significant that I can detect. When I use the ESP-IDF example deep sleep app the scope traces look identical. One of my top uses for the esp32 is as a gateway, so it doesn't make much sense to build a battery operated gateway ...

Yes, if you look at the 13-post series I go into pretty great detail what is happening and where the power is going...
I have not tried mesh or esp-now. They're both cool but for me the interest lies in being able to connect to the ubiquitous wifi infrastructure...

Oops! yes. fixed.

I've working quite a bit on answering that question for the esp32 and the esp8266. Using both deep-sleep and automatic light-sleep. I ended up writing a pretty long and in-depth blog post series that looks at both microcontrollers. The series starts at https://blog.voneicken.com/projects/low-power-w...