Widget of the Week #2: NodeMCU

I bet everyone who knows me was wondering how long it would take before I posted this one? The basic ESP8266 modules such as the ESP-01, -07 and -12 are small and cheap but not hacker-friendly so there are various modules around that put an ESP module onto a breakout board and provide essential functions such as voltage regulation, USB-serial and level conversion.  The forerunner is the NodeMCU which was originally intended as a Lua/NodeMCU firmware development platform but is perfectly good for other environments. The heart of it as you can see in the picture, is an ESP-12E module that…

Continue reading →

Widget of the Week #1: ESP-01 module

For the first of an irregular series of ‘Widget of the Week’ in which members will share the fruits of their frighteningly serious AliExpress and Banggood habits, I bring you the module that started it all, the ESP-01.  Intended for use in wireless serial applications, hackers soon found that it was field programmable and immensely versatile, not to say powerful – having not just far more memory and a faster CPU than the mainstream Arduinos but integrated WiFi with a pretty comprehensive IPv4 stack. On the one hand it’s somewhat hamstrung by having just three i/o pins but on the other, it…

Continue reading →