Search found 645 matches

by kolban
Wed Apr 26, 2017 10:31 pm
Forum: ESP32 SDK
Topic: Clarification on the bluetooth APIs
Replies: 1
Views: 199

Re: Clarification on the bluetooth APIs

While studying BLE, I seem to find that I can get away with:

* esp_ble_gap_*
* esp_ble_gattc_*
* esp_ble_gatts_*

and a couple of black box initialization functions at the start.
by kolban
Wed Apr 26, 2017 10:24 pm
Forum: General Discussion
Topic: libwebsockets won't build on OSX
Replies: 1
Views: 59

Re: libwebsockets won't build on OSX

Looking at the project on GitHub, it appears to be only a few weeks old and the paint isn't likely to have dried on it yet. What I'd suggest you do is create an issue on the GitHub project page and looks for some assistance with the developer. Try and provide as much information as you possibly can....
by kolban
Sun Apr 23, 2017 11:12 pm
Forum: General Discussion
Topic: crash on rmt_driver_install using non-GPIO pin
Replies: 5
Views: 106

Re: crash on rmt_driver_install using non-GPIO pin

That's a good idea. Espressif, any chance you can enable a Wiki from ESP32.COM?
by kolban
Fri Apr 21, 2017 4:11 am
Forum: General Discussion
Topic: SPI Flash - InstrFetchProhibited occured
Replies: 6
Views: 166

Re: SPI Flash - InstrFetchProhibited occured

I would suggest posting a fragment of code showing the exact statement that was being executed when the exception was caught.
by kolban
Thu Apr 20, 2017 12:55 am
Forum: ESP32 SDK
Topic: Need sample code for ILI9488 LCD on SPI Interface
Replies: 29
Views: 508

Re: Need sample code for ILI9488 LCD on SPI Interface

Looking here:

http://www.instructables.com/id/Arduino ... 88-SPI-In/

It would appear that the ILI9488 is close to the ILI9341. Looks like you could just about follow this instructables tutorial mapping from Arduino to ESP32.
by kolban
Tue Apr 18, 2017 11:32 pm
Forum: ESP32 SDK
Topic: [Info]: Low level bluetooth debugging
Replies: 0
Views: 88

[Info]: Low level bluetooth debugging

While studying Bluetooth (BLE) I found myself getting stuck. I couldn't follow the documentation and was getting errors I couldn't understand. I did some digging and found that the ESP32 Bluetooth stack is built on top of an existent bluetooth stack called "Bluedroid". That then took me in...
by kolban
Mon Apr 17, 2017 3:59 am
Forum: General Discussion
Topic: BLE characteristics UUID
Replies: 1
Views: 178

Re: BLE characteristics UUID

I reserve the right to be completely wrong here: My working assumption goes along the following lines. A GATT server exposes characteristics. What a GATT server starts, it maps those characteristics to local short integers called "handles". The "handles" are not hard-coded but ar...
by kolban
Mon Apr 17, 2017 3:47 am
Forum: General Discussion
Topic: How to structure semi-complex application?
Replies: 6
Views: 390

Re: How to structure semi-complex application?

For me personally, the FreeRTOS queue technology is a life saver. See: http://www.freertos.org/Embedded-RTOS-Queues.html One task places an event on the queue and the "controller" task pulls the events from the queue when there is an event ready or blocks if there isn't. The controller the...
by kolban
Mon Apr 17, 2017 3:43 am
Forum: General Discussion
Topic: BLE GATT Services
Replies: 10
Views: 624

Re: BLE GATT Services

One of the areas I am studying is BLE ... I'm also on a C++ kick. To that end I am working at creating some high level C++ classes that encapsulate the BLE functions. Early work is available here: https://github.com/nkolban/esp32-snippets/tree/master/cpp_utils For testing tools, Ive been using this:...
by kolban
Sat Apr 15, 2017 8:55 pm
Forum: General Discussion
Topic: I2C now working on IDF-v2.0
Replies: 1
Views: 162

Re: I2C now working on IDF-v2.0

Are you able to attach a logic analyzer to the bus to see what is being transmitted and received?

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