#1 From ESP-01 to ESP-DIY





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Published on May 4, 2016

Let's make an ESP8266 module that is simple, breadboard friendly and user friendly.

If you already have an ESP-01 module, take the EXP8266 microcontroller and some other components from that old ESP01 module. Practically all you need to buy is a breadboard adapter for the microcontroller, 5 of them cost only 2 $ at eBay, search for a QFN32 to DIP32 adapter.

You can easily solder and desolder SMD components (surface mount devices) with an ordinary hot air gun or even with a kitchen teflon frying pan. You don't need any sophisticated equipment for that. And a soldering iron, some soldering and flux you probably already have.

As a Hello World test and as a demonstration of our ESP-DIY module we use a simple LED blink program that may already be familiar to you from the Arduino IDE world.

The ESP-DIY module we make on this video is far more versatile than any of the factory made ESP modules:
- All the GPIOs are now accessible to you, including GPIO-pins GPIO9 and GPIO10.
- You can easily change the flash memory chip to a different one (for instance 4M-bit Winbond chip W 25Q40 BVNIG or 8M-bit BergMicro chip 25Q80 ASSIG) or to a bigger one (16M-bit) or to the biggest one that an ESP8266EX chip can have (for instance 32M-bit Winbond chip W 25Q32 FVSIG)
- you can freely choose the power supply type of your module and thus reliably test the power consumption of your battery driven low power systems,
- you can easily change the crystal frequency from 26 MHz to 24 MHz or 40 MHz,
- you can use any 2.4 GHz WiFi antenna type you want (ceramic antenna, antenna with an IPEX connector, meandered inverted-F antenna etc)
- and you can easily adjust the values of the few peripheral resistors and capacitors always in relation to the needs of your current different projects.

The steps of this video are all discussed in more detail on a web page https://docs.google.com/document/d/1O...

I add to the the web page topics that hopefully arise from your comments and questions below.

The next video will be about SMD soldering and about the GPIO9 and GPIO10 pins. We also attach the biggest possible flash memory to our microcontroller and make use of the user friendly NodeMCU reset method.


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