Hi makers!

I created this small PCB for ESP01S because before I was using a DIY version and then I bought several pieces, so the DIY version was no longer feasible.

The PCB is minimal and allows us access to the GPIOs. For power I use 5V, then I inserted a 3.3V regulator for the ESP01S board, as you can see. The components needed are few, you have a bill of materials available.

And now the instructions for programming using the Arduino IDE.

Add the ESP 01/01S board to the Arduino IDE (if it doesn't already exist) by entering the link in the indicated field (Arduino IDE → File → Preferences): http://arduino.esp8266.com/stable/package_esp8266com_index.json

Put a comma (,) between the others, if there are others (this is my case). Now we have the path needed to install the board.

Open Tools → Board → Boards Manager and search for "ESP8266", then install the version created by ESP8266 Community.

Now we need to know that there are physical differences between ESP01 and ESP01S.

On the ESP01 the red LED is for power signaling and the blue LED is the "built-in" one that can be controlled by program.

On the ESP01S we have a blue LED (built-in) that can be controlled by program.

https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.botnroll.com%2Fen%2Fwi-fi%2F5457-esp8266-serial-wifi-module-esp-01s.html&psig=AOvVaw3VPqO89z00mzzQ-GjHTMZI&ust=1749994442788000&source=images&cd=vfe&opi=89978449&ved=0CBcQjhxqFwoTCLCps8GD8Y0DFQAAAAAdAAAAABAE

But the pinout is the same:

https://www.google.com/url?sa=i&url=https%3A%2F%2Ftheorycircuit.com%2Fbasic%2Fesp8266-based-boards-and-its-pinout-details%2F&psig=AOvVaw2Rr1Fa5UxqQ53JqX3wifwH&ust=1751795785789000&source=images&cd=vfe&opi=89978449&ved=0CBAQjRxqFwoTCLDSypG6pY4DFQAAAAAdAAAAABAE

The diagram below shows how to program the ESP01S using FTDI. Be careful, put the jumper on 3.3V at FTDI, the ESP 01/01S board works at 3.3V.

https://www.google.com/url?sa=i&url=https%3A%2F%2Fwww.instructables.com%2FFTDI-ESP8266-Definitive-Wiring%2F&psig=AOvVaw3O8pTu-lbvlt2pClbHsHaq&ust=1749994602547000&source=images&cd=vfe&opi=89978449&ved=0CBcQjhxqFwoTCMiLhoqE8Y0DFQAAAAAdAAAAABAE

Connections between ESP01S ↔ FTDI:

• RX           → TX

• TX             → RX

• GND           → GND

• CHPD/EN  → 3.3V

• VCC           → 3.3V

• RST → Button → GND

• GPIO 0       → GND

https://techtalkies.in/2024/02/05/programming-esp-01-in-different-ways/?i=1

Don't forget that in the case of ESP01, after programming, you have to permanently connect CHPD/EN to 3V3. So just powering the board is not enough to make the program run.

The ESP01 board is a little bit different, the built-in LED is connected to pin 1 (change it in the sketch above), you still need to select like this:

I'm waiting for your project ideas in the comments. Thank you and enjoy it! 🤓👍