EMW3265 ESP8266 KILLER

Erm, no, though you might think so by this headline..  https://hackaday.com/2015/07/13/new-part-day-the-esp8266-killer Read the comments – the $5 ESP8266 – where?  $2 ESP8266 more like it – less, even – http://goo.gl/VB0V9K There’s even a claim that this new single-source board (Seeed Studio) has MORE memory – well at least one variation…

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Automatic Router Selection for ESP8266

I wonder if anyone who has done this can help.  As most of you know, I program my ESP8266 devices in C.  I’ve been having some issues with weak signal recently and it would be really nice to have a list of acceptable access points and their passwords – and…

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ESP8266 Remote Access

Notice I titled that remote access as against remote programming – but that’s part of it. Years ago, having gotten sick and tired of dismantling my home control Arduinos just to upgrade the code, I purchased a couple of small units from China which I’ve just thrown in the bin.  …

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ESP8266 RAM

I recently put out a question about the RAM in the ESP8266. In a typical compile, for me I might see… Sections:Idx Name Size VMA LMA File off Algn0 .data 00000894 3ffe8000 3ffe8000 000000e0 2**4CONTENTS, ALLOC, LOAD, DATA1 .rodata 0000275c 3ffe88a0 3ffe88a0 00000980 2**4CONTENTS, ALLOC, LOAD, READONLY, DATA3 .bss 00009a80…

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BASIC for ESP8266

Don’t get me wrong, we don’t yet have a fully working interpreter, but a link appeared on my ESP8266WIFI Facebook page thanks to Michael Molinari this morning and I thought I’d give it a whirl. http://esp8266basic.com/ I grabbed the Windows loader (Windows 10 put up a SEVERE warning about this…

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RGB versus HSV

In implementing my own home control solution which you’ll find in this blog “home control 2015” the software has been and remains a work in progress – mainly because I keep finding bugs and adding new features.  I’m fairly confident that most of the bugs that have plagued me over…

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Driving me NUTS

This has been driving me mad and I’ve only just found the answer – thanks to some clues people have given me – but as many of the responses were wrong – you might well find this interesting. I have a an array of 180 bytes – for 60 serial…

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EasyTransfer for ESP8266

I’m going to describe here the transmitting side of the EasyTransfer system as used in Arduino – the reason I did this was because I wanted to ship a bunch of binary data from the ESP8266 to the Arduino where I have a nice little wall mounted LCD display –…

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ESP8266 Mesh

Here it is – the ESP8266 Mesh English doc – who will be first to get this going? http://bbs.espressif.com/viewtopic.php?f=51&t=929   The Chinese docs have been out for some time as has the mesh SDK but the English docs just came out today – have fun.

ESP8266 Arduino NetIO Server Demo

This week as regular readers know I was far away from our little home in Spain – in fact I was at MIT (Massachusetts Institute of Technology)  in Boston, helping promote ESP8266 technology (why? because I could). Along the way I met up with Ivan Grokhotkov who as some of…

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FAB11 – Boston

This coming Monday/Tuesday/Wednesday I’ll be working with Espressif CEO Swee-Ann Teo,  Jeroen Domburg, Ivan Grokkhotkov and others at FAB11 in Boston – demonstrating how to use the ESP8266 chips in home control and other applications. Heading off from Alicante (Spain) first thing in the morning tomorrow (Sunday) and arriving late…

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ESP8266 Reliability and ID

Questions for you C programming ESP8266 guys re: the ESP SDK (1.2.0) and some possibly important info on WIFI and MQTT reliability. In the SDK: wifi_station_set_hostname wifi_station_get_hostname HOST ID….  If you do an IP scan on a windows network – ESP units will coming up as IP addresses – and…

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Hackitt and Bodgitt discover Healthy Lighting

There has been a lot of talk in the press recently about the colour of lighting and it’s relevance to health. As far back as 2012, the BBC reported that NASA were to test “space-sleep colour-changing lights” on the international space station and since then there have been a number…

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Accessing ESP8266 Arrays in FLASH

A new challenge – the answer to which I will post in here. Accessing an ESP8266 C array in FLASH – i.e. never touching RAM until you actually access something.  One suggestion was to ensure you use 4-byte variables.. so I tried this – it compiled – the array is…

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Lua Revisited

Back in the dark ages when the ESP8266 was something new, I had a go at the nodeMCU software, essentially implementing the Lua language (or a subset of it) on the ESP8266.  At the time I was not familiar with Lua but thanks to some of the excellent resources out…

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ESP8266 Debug

So – I’ve learned quiet a lot in the past few days.. Watchdogs on the ESP8266 Since Espressif SDK 1.01 or thereabouts, watchdog timer operation seems to have changed – delays of any length even in init()  are out – or so it would seem? So I got onto Stanza…

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ESP8266 RESET

As often as not, when I reset an ESP8266 by using the system reset call in the SDK, after flashing – for example. if (strcmp(token, “id”) == 0) {                    if (isQuery) RESPONSE(“ID=%s\r\n”, sysCfg.base);                    else if (strlen(strValue)>=2){                        strcpy(sysCfg.base, strValue);                        CFG_Save();                        system_restart();                    } The unit does not come out of reset.. the…

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ESP8266 Bliss

You may have seen comments in here from Richard Burton about his bootloader. Well, I have to tell you – what a game-changer. If you look at a previous blog where I showed you how we’d moved code from the fairly normal 0x40000 starting point down to 0x20000 – freeing…

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ESP8266 SDK 1.11

Just a short one for those of you who’ve not tried the new Espressif SDK update yet (SDK 1.11).  I noted a pair of commands “system_param_load” and “system_param_save_with_protect” which appear to replace the need for the load and save functions that TuanPM uses in his code in /mqtt/config.c  – so…

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