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by kolban
Wed Sep 20, 2017 8:25 pm
Forum: ESP32 SDK
Topic: LWIP- mulitple client example
Replies: 10
Views: 1341

Re: LWIP- mulitple client example

That looks great to me. The key thing is to study the sockets API ... and there are Unix man pages on these ... for example: https://linux.die.net/man/2/send Get familiar with reading these pages. See for example the "Return Value" section. See that you get -1 on error and then the global ...
by kolban
Wed Sep 20, 2017 2:02 pm
Forum: ESP32 SDK
Topic: No heap anymore after adding bluetooth in menuconfig
Replies: 13
Views: 109

Re: No heap anymore after adding bluetooth in menuconfig

jumjum123, While I am also not aware of any breakout boards support WROVER, I am delighted with this board: https://www.analoglamb.com/product/esp-wrover-kit-esp32-wrover-module/ (see @loboris post above). While the board is indeed pricy ($47) it is (opinion) well worth it. Think how much time we sp...
by kolban
Wed Sep 20, 2017 3:47 am
Forum: General Discussion
Topic: Workflow tip: When to delete <project>/build
Replies: 2
Views: 40

Workflow tip: When to delete <project>/build

From experimentation, it seems that we are ok to delete the <project>/build directory as it will get rebuilt when we next perform a new compilation. The question then becomes "is it necessary and if yes, under what circumstances?". These are my empirical experiences: 1. When ever I install...
by kolban
Wed Sep 20, 2017 1:59 am
Forum: ESP32 SDK
Topic: LWIP- mulitple client example
Replies: 10
Views: 1341

Re: LWIP- mulitple client example

The good news about the ESP-IDF sockets implementation is that is appears pretty faithful to "normal" sockets so any/all recipes that you find on the Internet relating to sockets should work just fine in the ESP-IDF environment. If a peer to the ESP32 disconnects/closes its connection, the...
by kolban
Wed Sep 20, 2017 1:55 am
Forum: General Discussion
Topic: Development Assistance with DevKitC
Replies: 2
Views: 43

Re: Development Assistance with DevKitC

I think there are many of us in the community who would either offer assistance for free or for a fee depending on description of your needs. Maybe if you could describe more about the nature of your requirements and your compensation schedule that would help a lot.
by kolban
Wed Sep 20, 2017 1:51 am
Forum: General Discussion
Topic: I2C breaks when initializing ESP32_LED_STRIP RMT
Replies: 3
Views: 48

Re: I2C breaks when initializing ESP32_LED_STRIP RMT

How many LEDs are you using and how are you powering them? Could the current draw from the LEDs be causing trouble at the other components? I believe a WS2812 can consume 60ma at full power.
by kolban
Mon Sep 18, 2017 2:02 pm
Forum: ESP32 SDK
Topic: mbedTLS server mode
Replies: 8
Views: 457

Re: mbedTLS server mode

I created an issue on Github relating to the puzzle I was having with mbedTLS ... the link is here: https://github.com/espressif/esp-idf/issues/1009 I am delighted to report that there were some awesome suggestions on what the cause may have been and they were bang on. In summary, it appears that th...
by kolban
Sun Sep 17, 2017 11:09 pm
Forum: ESP32 SDK
Topic: mbedTLS server mode
Replies: 8
Views: 457

Re: mbedTLS server mode

Howdy @BuddyCassino Oh my ... another SSL implementation. My thinking is that ESP-IDF supplies mbedTLS as a core TLS/SSL provider. The ESP-IDF then provides an OpenSSL API wrapper ... which I guess is because OpenSSL is a very popular API. If I understand correctly, BearSSL is yet *another* SSL impl...
by kolban
Sun Sep 17, 2017 2:54 am
Forum: General Discussion
Topic: flash-programming using rfc2217
Replies: 2
Views: 48

Re: flash-programming using rfc2217

Here is a link to the RFC2217 specification: https://www.rfc-editor.org/rfc/rfc2217.txt This is a quite old spec (nearly 20 years now). The high level appears that one can use a telnet client to connect to a telnet server that then drivers a UART/Serial port. For example, to drive an "old fashi...
by kolban
Sun Sep 17, 2017 1:39 am
Forum: ESP32 SDK
Topic: mbedTLS server mode
Replies: 8
Views: 457

Re: mbedTLS server mode

Did you ever get a resolution to this puzzle. I too have ended up at exactly the same place as you have using exactly the same mbedTLS sample application. I am at a loss to explain. Here is the ESP32 app I am using... https://pastebin.com/rRBsd9wx The symptoms are as you described. Premature EOF fol...

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