Search found 28 matches

by tvoneicken
Thu May 28, 2020 7:41 am
Forum: ESP-IDF
Topic: Where does crypto happen?
Replies: 3
Views: 794

Re: Where does crypto happen?

Thanks for the response! I a bit confused by this: In particular, RSA-based ciphersuite verification (with hardware MPI acceleration) is much faster in recent versions of ESP-IDF, and significantly faster than DHE / ECDHE Did you perhaps mean RSA vs. DSS / ECDSA? I'm looking at cipher suites with pe...
by tvoneicken
Wed May 27, 2020 3:56 am
Forum: ESP-IDF
Topic: Where does crypto happen?
Replies: 3
Views: 794

Where does crypto happen?

When I connect to a server using TLS, the connection can block for close to a full second depending on the cipher suite used. Currently, as far as I can tell, the app calls pretty directly into mbedtls, which means that the crypto all happens on the app core. Is there an easy way to move the crypto ...
by tvoneicken
Tue May 26, 2020 4:57 am
Forum: ESP-IDF
Topic: Task not launching even with plenty of free internal RAM
Replies: 4
Views: 673

Re: Task not launching even with plenty of free internal RAM

Memory fragmentation? The stack has to be contiguous and there may not be any contiguous chunk of that size.
by tvoneicken
Mon Jan 06, 2020 3:10 am
Forum: Hardware
Topic: ESP32-WROOM-32 flash mode and speed
Replies: 1
Views: 849

Re: ESP32-WROOM-32 flash mode and speed

Any suggestions for where to find an answer?
by tvoneicken
Fri Dec 27, 2019 11:03 pm
Forum: General Discussion
Topic: What would you like to see in The Next Chip?
Replies: 387
Views: 182550

Re: What would you like to see in The Next Chip?

After spending a couple of days banging my head against auto-light-sleep I wish the next round of chips have a bit more thought put into low power operation. Specifically, I find the fact that most peripherals stop working properly in light sleep to be abysmal, the uart being the first issue that mu...
by tvoneicken
Tue Dec 24, 2019 3:50 pm
Forum: Hardware
Topic: ESP32-WROOM-32 flash mode and speed
Replies: 1
Views: 849

ESP32-WROOM-32 flash mode and speed

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.
by tvoneicken
Tue Sep 03, 2019 7:20 pm
Forum: General Discussion
Topic: built-in variable 'tweaker'
Replies: 1
Views: 798

built-in variable 'tweaker'

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...
by tvoneicken
Sun Sep 01, 2019 4:27 pm
Forum: General Discussion
Topic: secure serial commandline over wifi
Replies: 0
Views: 756

secure serial commandline over wifi

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...
by tvoneicken
Sun Apr 07, 2019 7:39 pm
Forum: Showcase
Topic: [info] Logging on esp32 using ring_log
Replies: 3
Views: 5679

Re: [info] Logging on esp32 using ring_log

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?
by tvoneicken
Wed Dec 19, 2018 12:20 am
Forum: General Discussion
Topic: ESP32 on Batteries - your setup
Replies: 50
Views: 39755

Re: ESP32 on Batteries - your setup

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...

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