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)

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.

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 →

The  issue of running out of FLASH space on the ESP8266 is now resolved – if you are interested in how FLASH memory on the ESP8266 works -  especially using the Unofficial Development Environment with the official SDK and RBOOT works – you may find this useful. I now have more FLASH than I know what to do with...

Continue reading Challenge for the Day →

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.

Continue reading Fonts Galore →

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.  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.

Continue reading Silence of the Lambs →

I’ve had a return to experimenting with my “nano peripheral”.  You may recall I was buying all sorts of parts – A/D converters, port expanders etc. to help with my solar monitoring – and some time ago I had a shot at making an I2c peripheral using an Arduino Nano (you don't need to look this up).

Continue reading Nano I2c Peripheral →