Search found 35 matches

by Beta_Ravener
Fri Jun 02, 2017 8:36 pm
Forum: ESP8266 boards
Topic: Using persisting bytes array efficientlly
Replies: 9
Views: 2939

Re: Using persisting bytes array efficientlly

Problem with bytes is, that it is immutable collection: https://docs.python.org/3/library/functions.html#func-bytes . What that means is that part of it can't be changed, you have to create new object that will reflect those changes. If you, for example, changed single byte in bytes of length 1000, ...
by Beta_Ravener
Sun May 28, 2017 8:16 pm
Forum: ESP8266 boards
Topic: Basic WebSocket example needed
Replies: 3
Views: 4448

Re: Basic WebSocket example needed

So, in the meantime I came up with decent implementation that handles multiple connections in sane way. You can find the code here: https://github.com/BetaRavener/upy-websocket-server . Like WebREPL, the server is started both on AP and STA and upon connection from browser it first serves webpage, w...
by Beta_Ravener
Sat May 27, 2017 7:23 pm
Forum: ESP8266 boards
Topic: Basic WebSocket example needed
Replies: 3
Views: 4448

Basic WebSocket example needed

I have several projects for devices that I'd like to be able to be able to control through web browser, but I'd like them to be standalone - not a part of IoT network or anything. I'm using ESP8266, so I can just connect to the device directly as an AP. The device will then serve the web page to the...
by Beta_Ravener
Sat May 27, 2017 7:22 pm
Forum: ESP8266 boards
Topic: Async TCP Server
Replies: 3
Views: 2968

Re: Async TCP Server

What's your problem exactly? Is it not working in non-blocking mode? If so, what is the issue - does it stop executing script, you get an error or something else? I can see a problem with your code when you use non-blocking mode. You start to listen and then periodically check connection. In blockin...
by Beta_Ravener
Mon Sep 19, 2016 9:29 pm
Forum: ESP8266 boards
Topic: Why ESP8266?
Replies: 8
Views: 2801

Re: Why ESP8266?

Also price? I missed kick-starter campaigns and just hopped on the train recently after learning that $2 chip can run Python and I was quite intrigued by that possibility. However, I highly doubt I'd be buying pyboard for my embedded project. I think it's too expensive for just placing it in the gar...
by Beta_Ravener
Sat Sep 03, 2016 10:19 am
Forum: ESP8266 boards
Topic: Peak Current Consumption (Power Profile)
Replies: 3
Views: 3077

Re: Peak Current Consumption (Power Profile)

Ah sure, I know what you mean now. I have too seen a video with those spikes, guy tried there different (larger and larger) caps before smoothing them out eventually. Here it is (talking about peaks around 3:00 and caps at 4:00): https://www.youtube.com/watch?v=6SdyImetbp8 . So considering his exper...
by Beta_Ravener
Fri Sep 02, 2016 11:59 pm
Forum: ESP8266 boards
Topic: Peak Current Consumption (Power Profile)
Replies: 3
Views: 3077

Re: Peak Current Consumption (Power Profile)

I have accidentally stumbled upon answer to your question when looking around for options on powering ESP8266 from battery. It seems that the guys at Esperiff already did this and if you look into datasheet (which is strangely hosted by adafruit and has "confidential" all over it) page 10, you'll pr...
by Beta_Ravener
Mon Aug 29, 2016 5:56 pm
Forum: ESP8266 boards
Topic: Querying USB port
Replies: 5
Views: 1829

Re: Querying USB port

For esptool, you need to have also Python2 installed (version 2.7 is the most recent I think). Personaly, I use Anaconda (https://www.continuum.io/downloads) where you can basically create any environment and choose version of Python, but basic installation of Python 2.7 for windows will do. Then, y...
by Beta_Ravener
Mon Aug 29, 2016 3:42 pm
Forum: ESP8266 boards
Topic: Querying USB port
Replies: 5
Views: 1829

Re: Querying USB port

Normally on windows you would open device manager and look for your daughter board. Next to the name of the board should be the COM port it was assigned (something like this: http://www.sharpcam.co.uk/Images/Control-Panel13.jpg). Also, if you have esptool already installed, you could try using uPyLo...
by Beta_Ravener
Mon Aug 29, 2016 10:28 am
Forum: ESP8266 boards
Topic: SyntaxError at boot with esp8266-20160809-v1.8.3.bin
Replies: 4
Views: 2105

Re: SyntaxError at boot with esp8266-20160809-v1.8.3.bin

I had the same error when I switched from some older version of 1.8.2 to 1.8.3. I was also using something different at that time, not esptool. Cleaning flash and flashing the image with esptool solved the problem for me, so try running these 2 commands first (and replace the name of the image if ne...