Fonts Galore

In recent previous articles I’ve been working with various displays and various processors – and one thing that comes to the fore is the importance of fonts. TTF fonts are pretty useless for small microprocessor projects as the processing overhead can be significant – and though there are many standards out there – if you want to do this all without spending money – choices are limited. In addition to that, when it comes to icons – the chances of finding a readymade font with all the stuff you need and none of the stuff you don’t need – are pretty slim.

fonts

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SSD1306 on ESP8266

I recently completed some work on the 240*320 ILI-based boards on my kitchen-sink ESP8266 code which is designed to work with the home control system but basically is an ESP8266 board that responds to MQTT commands.

I’m very pleased with the display code but it came to my attention that the price has gone up recently – £4 - £7 depending where you go.  So having completed some work on the tiny but beautiful 128x32 OLED displays which are DIRT cheap, (see also the 64 pixel versions)  I thought I’d revisit the ESP code which already supports a number of I2c peripherals including my new Nano peripheral – and added in the SSD1306.

SSD1306

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Silence of the Lambs

I’ve spent WAY too many hours working on ILI9340 display updates for my ESP8266  kitchen sink C code but at least now I'm getting somewhere - that is - fast, easy serial or MQTT access to the display with multiple fonts. Display I got sick of trying to find decent fonts in bitmap mode (most of them look like something out of the 1990s) and decided the only way was to go GCLD – which is a relatively simple format with the advantage that there is a free Windows convertor/editor which takes in any old TTF font – of which there are millions – and converts them. Little did I know how many hours I'd need to put into making it work.

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ESP8266 Home Control Update

As the blog entry on using my home control code ROMS for ESP8266 is filling up and of course as much of the information is now dating I thought I’d do a new blog to bring everyone up to speed and move the conversation to this blog entry. The good news is  - the code is now running under SDK 2.1.0 – i.e. bang up to date at the time of writing.

Firstly – yes, everything works – but the procedure for flashing ESP-12 etc has changed ever so slightly. I have updated the binary files to run on Espressif SDK 2.1.0 and updated the RBOOT code I use for OTA (over-the-air updating) to the latest version.

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Mongoose OS

Mongoose OS is an open source Operating System for the IOT, supporting ESP32, ESP8266, STM32, TI CC3200 (Amazon AWS IoT integrated). Code in C or JavaScript.  Time to give it a go! Updated (gutted) June 02, 2017.

Some time ago I tested Mongoose OS, early days and I had a lot of difficulties.  This blog is a partial re-write because I see no reason to leave information lying around that is well out of date – there is a lot of that on the web already – and the current setup is MUCH easier to use than before.  I have to tell you that the version changed as I was writing this so make sure you have the latest mos.exe

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