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DIY: esp8266 programmer
My DIY wifi module flasher/programmer. The ftdi (red module) is the usb input. White button is for chip reset. Green jumper selects native ftdi power (if 3.3v, which this module is) or put green jumper on bottom 2 pins for lm1086-3.3 regulator (when the ftdi module is native 5v). Yellow jumper shorts to flash; open to enable user-mode. 3v zener diode on 5v ttl tx line since ESP module is not 5v-tolerant on its inputs.
DIY: esp8266 programmer
My DIY wifi module flasher/programmer. The ftdi (red module) is the usb input. White button is for chip reset. Green jumper selects native ftdi power (if 3.3v, which this module is) or put green jumper on bottom 2 pins for lm1086-3.3 regulator (when the ftdi module is native 5v). Yellow jumper shorts to flash; open to enable user-mode. 3v zener diode on 5v ttl tx line since ESP module is not 5v-tolerant on its inputs.