ESP8266 3D Printer Hotend Controller

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MOSFETs

NDT3055L PMV16XN
NDT3055L N-Channel Logic Level Enhancement Mode Field Effect Transistor PMV16XN 20 V, N-channel Trench MOSFET

Schematic

Hotend Schematic
Hotend Schematic based on circuits from RepRap

Connections

ESP8266 D1 mini D1 mini ESP8266
RST RST TX TXD
Thermistor A0 A0 (Max 3v3) RX RXD
GPIO16 D0 D1 (SCL) GPIO5 Fan PWM
GPIO14 D5 (SCK) D2 (SDA) GPIO4 Heater PWM
OLED SCL GPIO12 D6 (MISO) D3 (10K PU) GPIO0
OLED SDA GPIO13 D7 (MOSI) D4 (10K PU LED) GPIO2
GPIO15 D8 (10K PD SS) GND GND Pin 4
3v3 3v3 5v 5v Power IR Led

Links

These links are because I intend to use fuzzy logic, as opposed to PID, to control the hot-end temperature.

These links are to help me measure the hot-end temperature