Category Archives: General

SSD1306 on the NEO Plus2

You might recall some time ago I wrote about using Python on the Orange Pi Zero etc to run the little SSD1306-based displays.

Despite that being successful I did have a nagging doubt about the LUMA library because later on – when doing some apt-get upgrades I got a segmentation error which I’d originally attributed to using a hard disk with the device. I now think it might be something to do with that library. Well, when my NEO PLUS2 arrived I thought I’d try again..

WELL!!! This version works and also works with the NanoPi AIR AND the NEO2 using the standard Ubuntu image (and has solved my problem with the hard drive on the NEO2)...

Continue reading SSD1306 on the NEO Plus2

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OTA

A quick note – I have made all of my sites secure (https://) and so the original OTA site for my ESP8266 ROMS is no longer appropriate.   roms.webutu.com  is now the place to go –   sorry for any inconvenience. The files are not seen if you visit the site, just a home page - you simply enter the name of the site followed by slash and the rom name - for example...  roms.webutu.com/rom.bin

Files available are:

blank.bin

esp_init_data_default.bin

rboot.bin

rom.bin

romx.bin

blank.bin and esp_init_data_default.bin are needed for utterly blank ESP12 units.

rboot.bin and rom.bin are for my new ESP8266 code (which no longer supports ESP-01)

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Today’s Mailbag

I have to say, it felt a little like Christmas today when the Correos post-lady turned up with a plastic container full of packages from China for me.

Wemos

Among the many items in today’s post were the two you see above – a WEMOS board (i.e.  ESP-12 + power supply) which includes an OLED display. As you’ll know I’ve recently added the SD1306 display to the commands on my ESP8266 code – looks like they’ve done the same but gone a stage further and added the actual display to the board.

(While I'm here - note the site is now https:// rather than http://  - if anyone has issues (despite refreshing the browser) - do please let me know.

Continue reading Today’s Mailbag

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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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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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Terminal Login

I made this as a continuation of my current work with the NEO2 but there is no reason why this could not be adapted to other boards. There are also many ways to achieve the same thing i.e. colourful terminal login – this is merely a what I chose to do.

promptSo I like colourful terminals when working with little boards like the Raspberry Pi , NEO and many others.  I’ve long since gone off using the graphical interfaces (unless I’m making a media centre) – and play with the boards mainly from my Windows PC using WinSCP which gives me graphical access to the file structure and the ability to use Microsoft Studio Code (I used to use Notepad++ but that was, it seems, a lifetime ago).

Continue reading Terminal Login

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