// environment
MAX6675 (K-Type Thermocouple)
K-type thermocouple amplifier
€3.50
avg eur
SPI
Pins
5
Specs
3
Libraries
2
Protocols
1
// wiring → esp32 devkit v1
VCC
3V3
EN
GPIO36
VP
GPIO39
VN
GPIO34
GPIO35
GPIO32
GPIO33
GPIO25
GPIO26
GPIO27
GPIO14
GPIO12
GND
GND
GPIO13
ESP32
WROOM-32
devkit v1
USB
VIN
5V
GND
GPIO23
GPIO22
SCL
GPIO1
TX0
GPIO3
RX0
GPIO21
SDA
GPIO19
MISO
SO
GPIO18
SCK
SCK
GPIO5
SS
CS
GPIO17
TX2
GPIO16
RX2
GPIO4
GPIO2
GPIO15
sensor pin (left)
sensor pin (right)
unused
// pinout → esp32
| Sensor Pin | ESP32 Connection |
|---|---|
| VCC | 3.3V |
| GND | GND |
| SCK | GPIO 18 |
| CS | GPIO 5 |
| SO | GPIO 19 (MISO) |
// technical specs
Range
0–1024°C
Resolution
0.25°C
Voltage
3.0–5.5V
// github libraries
// notes & warnings
Read-only SPI. For higher accuracy + cold-junction compensation use MAX31855 / MAX31856.
// related sensors · environment
Submitted by caio.ricciuti@outlook.com
· Apr 26, 2026