Category: ESP12

Some thoughts on Node Red variables

Peter ScargillESP12, ESP8266, javascript, nextion, node-red, node.js, Raspberry Pi, Raspberry Pi 211 Comments on Some thoughts on Node Red variables

In learning how to use Node-Red I’ve changed my coding countless times as I’ve found better ways to do things. Please note that in 2017, the way I use global variables here is out of date. It still works but for example context.global.fred=1 is now written as global.set(“fred”,1). Read this…

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EMW3265 ESP8266 KILLER

Peter ScargillEMW6232, ESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-12F, ESP-13, ESP-201, ESP-210, ESP12, ESP12E, ESP8266, ESP8266 SDK12 Comments on 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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Cheap ESP8266 NodeMCU

Peter ScargillESP12, ESP12E, ESP826627 Comments on Cheap ESP8266 NodeMCU

Seems like a good offer from Banggood – from their China warehouse (the EU warehouse is for some reason more expensive) http://www.banggood.com/NodeMcu-Lua-ESP-12E-WIFI-Development-Board-p-985891.html?utm_source=google&utm_medium=cpc&utm_campaign=Celc-ad-KI-Unbeat-ESP12E&utm_content=hazel&utm_design=27&gclid=CJyo17OZ9MgCFc-6GwoddIgJbA And while we’re on – a new board.. http://www.espert.co/

Automatic Router Selection for ESP8266

Peter ScargillESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-12F, ESP-13, ESP-201, ESP-210, ESP12, ESP8266, ESP8266 SDK5 Comments on 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

Peter ScargillArduino, Eclipse, ESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-12F, ESP-13, ESP-201, ESP-210, ESP12, ESP8266, ESP8266 SDK25 Comments on 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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QD Tech Displays on the ESP8266

Peter Scargilldisplays, Electronics, ESP-07, ESP-12, ESP-12E, ESP-13, ESP-201, ESP-210, ESP12, ESP8266, ESP8266 SDK, LCD28 Comments on QD Tech Displays on the ESP8266

I’ve seen a number of projects using an Arduino and an ESP8266 to drive LCD displays. You may know that my home control has used a 1284-based board (MEGA type) to run a nice Thermostat display for some time now. The displays look very pretty in the right box. THIS…

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ESP8266 RAM

Peter ScargillESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-13, ESP-201, ESP-210, ESP12, ESP82661 Comment on 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

Peter ScargillESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-13, ESP-201, ESP-210, ESP12, ESP826626 Comments on 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

Peter ScargillESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-13, ESP-201, ESP-210, ESP12, ESP82661 Comment on 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

Peter ScargillESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-13, ESP-201, ESP-210, ESP12, ESP8266, modulus, Uncategorized13 Comments on 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

Peter ScargillESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-13, ESP-201, ESP-210, ESP12, ESP8266, ESP8266 SDK13 Comments on 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

Peter ScargillESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-13, ESP-201, ESP-210, ESP12, ESP8266, ESP8266 SDK8 Comments on 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

Peter ScargillESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-13, ESP-201, ESP-210, ESP12, ESP8266, ESP8266 SDK, Espressif6 Comments on 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

Peter ScargillESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-13, ESP-201, ESP-210, ESP12, ESP8266, ESP8266 SDK, FAB112 Comments on 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

Peter ScargillESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-13, ESP-201, ESP-210, ESP12, ESP8266, ESP8266 SDK9 Comments on 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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Accessing ESP8266 Arrays in FLASH

Peter ScargillESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-13, ESP-201, ESP-210, ESP12, ESP8266, Flash23 Comments on 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

Peter ScargillEclipse, ESP-01, ESP-02, ESP-03, ESP-04, ESP-05, ESP-06, ESP-07, ESP-08, ESP-09, ESP-10, ESP-11, ESP-12, ESP-12E, ESP-13, ESP-201, ESP-210, ESP12, ESP8266, LUA, MQTT12 Comments on 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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