Search found 1355 matches

by ESP_Angus
Wed Jan 23, 2019 4:58 am
Forum: Hardware
Topic: PICO-D4 SMA Antenna Matching
Replies: 3
Views: 208

Re: PICO-D4 SMA Antenna Matching

If you want maximum RF performance then a matching network will always help you achieve this. One option is to contact sales and ask for advice from an RF engineer, as Sprite suggests. However, a good place to start first is the ESP32-PICO-KIT reference design which you can find on the espressif.com...
by ESP_Angus
Tue Jan 22, 2019 3:34 am
Forum: ESP32 IDF
Topic: Why code is placed into IRAM
Replies: 4
Views: 183

Re: Why code is placed into IRAM

Thanks for sending all those details. This is a bug in one of the IDF linker scripts when SPIRAM is enabled. The clue is in the linker script map file, where it prints each line of linker command followed by matching sections linked in the binary: *lock.o(.literal .text .literal.* .text.*) *fill* 0x...
by ESP_Angus
Tue Jan 22, 2019 3:08 am
Forum: General Discussion
Topic: Problem with powerbank with ESP32
Replies: 6
Views: 217

Re: Problem with powerbank with ESP32

I am not saying this is the problem, but I have seen power banks that will not power up deices if the load is not high enough. Yes. I have had no success using power banks as a power source for ESP8266 or ESP32 for this reason. As soon as the consumed current drops below some level, the battery thi...
by ESP_Angus
Mon Jan 21, 2019 6:57 am
Forum: ESP32 IDF
Topic: Why code is placed into IRAM
Replies: 4
Views: 183

Re: Why code is placed into IRAM

Hi maximkulkin, That's odd. The linker .map file (in the build directory) may help. This file has a large amount of detail, it's parsed by the "make size" commands to produce the summary output. If this information is not sensitive, please consider posting the esp32.ld file (from the build directory...
by ESP_Angus
Mon Jan 21, 2019 6:55 am
Forum: General Discussion
Topic: Python EGG_INFO and PACMAN really hurt
Replies: 2
Views: 141

Re: Python EGG_INFO and PACMAN really hurt

To add to Roland's comment, if you don't want to move to the IDF Tools Installer (which means using the new CMake build system rather than the older GNU Make build system, and does not use MSYS2 at all) then there are also pre-configured MSYS2 environments that you can download for Windows: https://...
by ESP_Angus
Mon Jan 21, 2019 3:42 am
Forum: ESP32 IDF
Topic: Use of signal.h in third-party library
Replies: 2
Views: 90

Re: Use of signal.h in third-party library

Hi PatrikB, Unfortunately there are some standard libc headers in newlib for some features which are not supported in ESP-IDF. ESP-IDF and FreeRTOS has no concept of POSIX signal handlers, so code which calls signal() will not work. I'm afraid you'll have to refactor the third party code so it doesn...
by ESP_Angus
Tue Jan 15, 2019 12:41 am
Forum: ESP32 IDF
Topic: netconn_close whilst blocked in netconn_recv
Replies: 2
Views: 139

Re: netconn_close whilst blocked in netconn_recv

LWIP doesn't support closing a netconn from one task while another task is blocked on it.

(Upstream LWIP also doesn't support doing this for the BSD sockets API, but we've added support for this to the BSD Sockets API in ESP-IDF's LWIP fork.)

What you're doing with a timeout is a good solution.
by ESP_Angus
Tue Jan 15, 2019 12:37 am
Forum: General Discussion
Topic: (solved) LWIP/sockets memory leak?
Replies: 6
Views: 304

Re: LWIP/sockets memory leak?

Running this code will run my ESP32 out of heap in a matter of minutes. Does this actually happen or does heap usage stabilise after a few iterations? There are some resources (TCP sockets for example) which continue to occupy some memory after being closed (because of the TIME_WAIT state). In this...
by ESP_Angus
Thu Jan 03, 2019 9:55 pm
Forum: ESP32 IDF
Topic: IRAM0 segment data does not fit
Replies: 19
Views: 888

Re: IRAM0 segment data does not fit

Hi Peter,

The ESP-IDF build system should enable these flags by default, so as long as your project doesn't replace CFLAGS/CXXFLAGS/LDFLAGS then it should be doing this already.

Angus
by ESP_Angus
Thu Jan 03, 2019 9:52 pm
Forum: General Discussion
Topic: Secure Bootloader Error despite being disabled
Replies: 6
Views: 339

Re: Secure Bootloader Error despite being disabled

Hi Brett,

Thanks for updating. Glad you found the root case.

Angus

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