This weekend i finalized my ESP-01 programming adapter board.
The circuit is a little bit changed compared to the diagram posted earlier in the post “ESP-01 Module”
I added two terminals for connecting external 3,3V and GND. This change I made because I could not get the wifi function on the ESP-01 module to work, when the module was powered through the USB to TTL board.
On the left you see the board i made.
And here you see the board with the ESP-01 and USB-TTL modules connected.
I have not desided yet, but maybe I will add two terminals for wire connection to the GPIO0 and GPIO2.