Search found 27 matches

by novalight
Sat Dec 09, 2017 7:42 am
Forum: ESP32 SDK
Topic: mbedTLS: automatically load appropriate cert from file-system
Replies: 3
Views: 79

Re: mbedTLS: automatically load appropriate cert from file-system

Thank you for your replies so far! Root CA validation has not been an issue so far for us performance-wise. The problem is: for some of our services we cannot guarantee that server or root CA might change. (such as you don't do that also when you browse normal web pages) One additional thought: when...
by novalight
Fri Dec 08, 2017 5:59 pm
Forum: ESP32 SDK
Topic: mbedTLS: automatically load appropriate cert from file-system
Replies: 3
Views: 79

mbedTLS: automatically load appropriate cert from file-system

Use case: when I access a HTTPS site from my browser on my windows machine, I have a selection of trusted root certs and the remotes cert is validated automatically against these trusted certs. However in the ESP32 HTTPS examples it works differently: I have to provide upfront the correct server cer...
by novalight
Fri Dec 08, 2017 7:20 am
Forum: ESP32 HDK
Topic: 26MHz TCXO (not crystal) -- which pin to connect to?
Replies: 9
Views: 995

Re: 26MHz TCXO (not crystal) -- which pin to connect to?

Angus, thanks for the information so far! We implemented now the 40 MHz TCXO on our prototype. It is always on (since it's not a battery powered application). For 32k we still use a simple 10 ppm external crystal. Everything is running fine so far. One additional question though: With the ECS-TXO-25...
by novalight
Wed Nov 22, 2017 8:26 pm
Forum: ESP32 SDK
Topic: OTA-Update strategy (regarding IDF updates, bootloader etc.)
Replies: 2
Views: 129

OTA-Update strategy (regarding IDF updates, bootloader etc.)

This concerns a topic we have been discussing internally for a while. Imagine you have hundreds of devices deployed in a remote place that can only be accessed by a technician about once per year. A few devices are available for local testing, some are installed in facilities that can be accessed wi...
by novalight
Thu Nov 09, 2017 2:27 pm
Forum: ESP32 HDK
Topic: SPI Memory selection
Replies: 7
Views: 3191

Re: SPI Memory selection

Since we are right now evaluating different options for our production. Basically we are looking for 8MB, 80MHz, 3.3V and QIO support. But we found that the market and the flash-support by ESP32 is a little bit non-obvious. Many chips are shown as EOL on Mouser or Digikey. It would really help if th...
by novalight
Mon Nov 06, 2017 10:00 am
Forum: General Discussion
Topic: esp32 compilation problems ?
Replies: 6
Views: 247

Re: esp32 compilation problems ?

I have seen something similar when I share a project between Windows and Linux. Some things are compiled/linked differently. The solution in my case is to delete the build directory every time I switch the system. Could you maybe try that?
by novalight
Wed Oct 18, 2017 10:05 am
Forum: ESP32 SDK
Topic: Won't reboot after spurious crash. "W (32) rtc_clk: Bogus XTAL frequency: 0 MHz"
Replies: 1
Views: 301

Re: Won't reboot after spurious crash. "W (32) rtc_clk: Bogus XTAL frequency: 0 MHz"

FYI, since this bug looks quite serious to us (it prevents unattended operation of the device basically) I've created an issue on github:
https://github.com/espressif/esp-idf/issues/1132
by novalight
Wed Oct 18, 2017 7:59 am
Forum: ESP32 HDK
Topic: 26MHz TCXO (not crystal) -- which pin to connect to?
Replies: 9
Views: 995

Re: 26MHz TCXO (not crystal) -- which pin to connect to?

Sorry for pushing this, but since we have to plan our next board revision, some additional hints would be quite helpful here. ⋅ Would it be a problem if the oscillator runs all the time? [note: also during reboot, deep sleep, etc.] (When power consumption won't matter) ⋅ If we wa...
by novalight
Wed Oct 18, 2017 7:54 am
Forum: ESP32 SDK
Topic: Log output on UART1 does not work any more
Replies: 1
Views: 172

Re: Log output on UART1 does not work any more

There is now a github issue regarding this bug:
https://github.com/espressif/esp-idf/issues/1131
by novalight
Fri Sep 29, 2017 1:20 pm
Forum: Report Bugs
Topic: I2C bus_busy set on startup/reboot and no recovery option
Replies: 8
Views: 533

Re: I2C bus_busy set on startup/reboot and no recovery option

Good to hear! You can for post an update in this thread when a fix appears in idf/docs. I will add it now to my main.
Do I delay/NOP between the calls?