Search found 62 matches

by MalteJ
Fri Feb 24, 2017 11:12 pm
Forum: ESP32 IDF
Topic: malloc fails with LoadProhibited guru meditation error
Replies: 5
Views: 4615

Re: malloc fails with LoadProhibited guru meditation error

I have recompiled and now I get esp32/esp-idf/components/freertos/./heap_regions.c:368 (vPortFreeTagged)- assert failed! abort() was called at PC 0x40083de3 Guru Meditation Error: Core 0 panic'ed (abort) Backtrace: 0x40009203:0x3ffbcef0 0x40084be0:0x3ffbcf10 0x400d145d:0x3ffbcf30 0x40081924:0x3ffbcf...
by MalteJ
Fri Feb 24, 2017 11:04 pm
Forum: ESP32 IDF
Topic: malloc fails with LoadProhibited guru meditation error
Replies: 5
Views: 4615

malloc fails with LoadProhibited guru meditation error

Hi, I have a problem with my program: At a certain point my program stops with a Guru meditation error LoadProhibited. I (65449) TLV: free heap: 152908 bytes I (65449) TLV: tlv->bin: 0x0 I (65449) TLV: tlv->len: 0 I (Guru Meditation Error of type LoadProhibited occurred on core 0. Exception was unha...
by MalteJ
Sun Feb 19, 2017 11:33 am
Forum: ESP32 IDF
Topic: How to get Date and Time?
Replies: 1
Views: 19837

Re: How to get Date and Time?

Oh, there is an example I have missed:
https://github.com/espressif/esp-idf/tr ... ocols/sntp

:)
by MalteJ
Sun Feb 19, 2017 11:11 am
Forum: ESP32 IDF
Topic: How to get Date and Time?
Replies: 1
Views: 19837

How to get Date and Time?

Hi, what is the preferred way to realize a datetime clock on ESP32? I'd like to get a reference time from the internet (e.g. via NTP) and set a local clock. The only thing I have found is xTaskGetTickCount(). Using this I can imagine something like uint32_t offset; void init_timestamp() { // get cur...
by MalteJ
Tue Feb 14, 2017 7:24 pm
Forum: ESP32 IDF
Topic: ESP32 as stanalone Webserver
Replies: 25
Views: 23151

Re: ESP32 as stanalone Webserver

Be careful! Without encryption you are going to send your WiFi password in plain text over the air!

Malte
by MalteJ
Sun Feb 12, 2017 10:25 pm
Forum: ESP32 IDF
Topic: Advertizing through mDNS
Replies: 12
Views: 9948

Re: Advertizing through mDNS

It looks like the mdns library does not add a PTR to your service to _services._dns-sd._udp.local

see https://developer.apple.com/library/con ... index.html

Looks like a bug!

Malte
by MalteJ
Mon Feb 06, 2017 11:33 am
Forum: ESP32 IDF
Topic: mbedTLS: HTTP Public Key Pinning
Replies: 1
Views: 1798

mbedTLS: HTTP Public Key Pinning

Hi,

I am trying to implement HTTP Public Key Pinning (HPKP) using mbedTLS. The TLS connection is set up, handshake is done and I have the peer's x509 certificate as an mbedtls_x509_crt struct. Now I am stuck. How do I access the subjectPublicKeyInfo that I need to hash?

Thank you!

Best,
Malte
by MalteJ
Sat Jan 28, 2017 10:57 am
Forum: ESP32 IDF
Topic: NGHTTP2 missing from include path
Replies: 4
Views: 2762

Re: NGHTTP2 missing from include path

are you working on an http2 server?
that would be very interesting for me, too!

Best,
Malte
by MalteJ
Fri Jan 20, 2017 10:52 am
Forum: ESP32 IDF
Topic: ESP output pin as clock input for IC
Replies: 9
Views: 8717

Re: ESP output pin as clock input for IC

Great! Thanks for your assessment!

I will give it a try.

Best,
Malte
by MalteJ
Fri Jan 20, 2017 10:34 am
Forum: ESP32 IDF
Topic: ESP output pin as clock input for IC
Replies: 9
Views: 8717

ESP output pin as clock input for IC

Hey,

I am wondering, is it possible to use an esp32's GPIO pin as a clock source for an external IC?
The IC needs a 4 MHz square signal. Can I use an esp32 hardware timer and do something like PWM for generating this clock signal?
What is the maximum frequency that can be realized?

Thank you!

Malte

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