diff --git a/lib/max31856/max31856.h b/lib/max31856/max31856.h
new file mode 100644
--- /dev/null
+++ b/lib/max31856/max31856.h
@@ -0,0 +1,64 @@
+#ifndef MAX31856_H
+#define MAX31856_H
+
+#include "stm32f3xx_hal.h"
+
+void max31856_init(SPI_HandleTypeDef* spi_port, GPIO_TypeDef* cs_port, uint32_t cs_pin, uint32_t sensor_type);
+void max31856_process(void);
+float max31856_latest_temp(void);
+float max31856_avg_temp(void);
+
+// Thanks to Adafruit:
+#define MAX31856_CR0_REG           0x00
+#define MAX31856_CR0_AUTOCONVERT   0x80
+#define MAX31856_CR0_1SHOT         0x40
+#define MAX31856_CR0_OCFAULT1      0x20
+#define MAX31856_CR0_OCFAULT0      0x10
+#define MAX31856_CR0_CJ            0x08
+#define MAX31856_CR0_FAULT         0x04
+#define MAX31856_CR0_FAULTCLR      0x02
+
+#define MAX31856_CR1_REG           0x01
+#define MAX31856_MASK_REG          0x02
+#define MAX31856_CJHF_REG          0x03
+#define MAX31856_CJLF_REG          0x04
+#define MAX31856_LTHFTH_REG        0x05
+#define MAX31856_LTHFTL_REG        0x06
+#define MAX31856_LTLFTH_REG        0x07
+#define MAX31856_LTLFTL_REG        0x08
+#define MAX31856_CJTO_REG          0x09
+#define MAX31856_CJTH_REG          0x0A
+#define MAX31856_CJTL_REG          0x0B
+#define MAX31856_LTCBH_REG         0x0C
+#define MAX31856_LTCBM_REG         0x0D
+#define MAX31856_LTCBL_REG         0x0E
+#define MAX31856_SR_REG            0x0F
+
+#define MAX31856_FAULT_CJRANGE     0x80
+#define MAX31856_FAULT_TCRANGE     0x40
+#define MAX31856_FAULT_CJHIGH      0x20
+#define MAX31856_FAULT_CJLOW       0x10
+#define MAX31856_FAULT_TCHIGH      0x08
+#define MAX31856_FAULT_TCLOW       0x04
+#define MAX31856_FAULT_OVUV        0x02
+#define MAX31856_FAULT_OPEN        0x01
+
+
+#define MAX31856_WRITE_BIT		   0x80
+
+typedef enum
+{
+  MAX31856_TCTYPE_B  = 0b0000,
+  MAX31856_TCTYPE_E  = 0b0001,
+  MAX31856_TCTYPE_J  = 0b0010,
+  MAX31856_TCTYPE_K  = 0b0011,
+  MAX31856_TCTYPE_N  = 0b0100,
+  MAX31856_TCTYPE_R  = 0b0101,
+  MAX31856_TCTYPE_S  = 0b0110,
+  MAX31856_TCTYPE_T  = 0b0111,
+  MAX31856_VMODE_G8  = 0b1000,
+  MAX31856_VMODE_G32 = 0b1100,
+} max31856_thermocoupletype_t;
+
+
+#endif