Search found 1683 matches

by kolban
Sat Dec 17, 2016 4:15 pm
Forum: General Discussion
Topic: audio streaming
Replies: 2
Views: 1440

Re: audio streaming

If I had a project that needed to play a sound, I would use a module similar to this one: http://www.ebay.com/itm/4-Channel-Control-Voice-Sound-Record-Playback-Module-5V-Arduino-/401097858280?hash=item5d634b9ce8 It can store a few minutes of quality audio and has an amplifier built in. All one needs...
by kolban
Sat Dec 17, 2016 12:28 am
Forum: ESP32 IDF
Topic: Storage allocation puzzles ... heap vs static ...
Replies: 4
Views: 1971

Storage allocation puzzles ... heap vs static ...

I'm a dummy in this area but keen to learn. I hear phrases like IRAM, cache and heap and am trying to build a mental picture. I think of the heap as a chunk of memory (RAM) from which data can be carved. In simple terms, this is where malloc() storage comes from. The program stack is where local var...
by kolban
Fri Dec 16, 2016 8:41 pm
Forum: ESP32 IDF
Topic: How much ram does a socket connection consume?
Replies: 0
Views: 753

How much ram does a socket connection consume?

I am working on a large project (a JavaScript runtime). I am starting to find that I am beginning to get "squeezed" on RAM. One of the things I seem to be finding is that when I have an active socket connection from a PC based client into my ESP32, the ESP32 seems to want to use ~20K of RA...
by kolban
Fri Dec 16, 2016 8:37 pm
Forum: General Discussion
Topic: Issue with UART receive interrupt
Replies: 2
Views: 1391

Re: ISSUE WITH UART RECEIVE INTERRUPT IN ESP32

I would suggest posting a schematic of how you have wired the ESP32 to your peripheral and some references to the data sheet of that peripheral. In addition, what is the nature of the application communicating with the peripheral? Did you write it? If not, where did it come from? Also check the UART...
by kolban
Fri Dec 16, 2016 8:35 pm
Forum: General Discussion
Topic: console input through UART port
Replies: 4
Views: 2731

Re: console input through UART port

The ESP32 can run arbitrary applications written to use the ESP-IDF framework. This is a C language environment in which you can develop a variety of different programs. Included in this framework are rich UART libraries that allow an application to both write to and read from the UART. There is not...
by kolban
Fri Dec 16, 2016 2:42 pm
Forum: ESP32 IDF
Topic: Exchanging keys securely?
Replies: 6
Views: 1863

Re: Exchanging keys securely?

One way to potentially get an answer to our question is to search through existing products that we can find on the Internet and see what their setup procedures may be. Here is an example: http://www.gelinkbulbs.com/downloads/GELinkInstallGuide.pdf With this product,one seems to use Bluetooth from y...
by kolban
Fri Dec 16, 2016 6:38 am
Forum: ESP32 IDF
Topic: Exchanging keys securely?
Replies: 6
Views: 1863

Re: Exchanging keys securely?

I had assumed that if an ESP32 was setup as an access point and I connected a WiFi device (eg. my phone) to the ESP32 then the data transmitted from my phone to the ESP32 was encrypted if I use WPA or WPA2 to authenticate? Wouldn't that secure access to the data? In my models, I have an ESP32 boot u...
by kolban
Fri Dec 16, 2016 6:29 am
Forum: General Discussion
Topic: What version of lwip esp-idf using, Folder catalog not the same with LWIP latest
Replies: 4
Views: 1436

Re: What version of lwip esp-idf using, Folder catalog not the same with LWIP latest

If we look at the Espressif ESP-IDF copy of lwip ... we find a VERSION file: https://github.com/espressif/esp-idf/blob/master/components/lwip/VERSION In that version file we find a Git commit identifier: bf7fc41e If we then run "git show bf7fc41e" against the LWIP Git repository, we find t...
by kolban
Wed Dec 14, 2016 11:29 pm
Forum: ESP32 Arduino
Topic: WiFiClient connection error
Replies: 6
Views: 2757

Re: WiFiClient connection error

Congrats on getting it working ... awesome. Might you have a few minutes to post what you did in case someone in the future has the problem and finds this post?
by kolban
Wed Dec 14, 2016 11:28 pm
Forum: ESP32 Arduino
Topic: Unable to read from BME280
Replies: 24
Views: 11104

Re: Unable to read from BME280

I too would like to confirm that using the Arduino distribution as of the date of this post, my BMP180 is now reading correctly. However the I2C scanner that used to work is now reporting that there is a device on ALL possible I2C addresses. The author of the Arduino package has been informed and is...