ESP-01 Programmer Schematic
ESP-01 plugs into a 4x2 socket.
IC_EN is hard wired to VCC.
A jumper is fitted to CON2 and the reset switch pressed to put the device in programming mode. If the jumper is not fitted then pressing the reset button simply reboots the SoC and starts the programme.
A CH340G USB to serial adapter is used to connect the programmer to the PC, with the adapter set to 3.3V - the ESP8266 SoC is not 5V tolerant.
ESP-01 Programmer Schematic
ESP-01 plugs into a 4x2 socket.
IC_EN is hard wired to VCC.
A jumper is fitted to CON2 and the reset switch pressed to put the device in programming mode. If the jumper is not fitted then pressing the reset button simply reboots the SoC and starts the programme.
A CH340G USB to serial adapter is used to connect the programmer to the PC, with the adapter set to 3.3V - the ESP8266 SoC is not 5V tolerant.