feature/unit/kmeteriso: K-type thermocouple sensor[STM32F0+MAX31855KASA]

Author: pandiannano

m5stack/libs/unit/__init__.py

@@ -49,6 +49,7 @@
     "VMeterUnit": "vmeter",
     "AMeterUnit": "ameter",
     "WEIGHT_I2CUnit": "weight_i2c",
+    "KMETER_ISOUnit": "kmeter_iso",
 }
 
 

m5stack/libs/unit/kmeter_iso.py

@@ -0,0 +1,82 @@
+from machine import I2C
+from .pahub import PAHUBUnit
+from .unit_helper import UnitError
+import struct
+import sys
+
+if sys.platform != "esp32":
+    from typing import Union
+
+import time
+import struct
+
+KMETER_ADDR = 0x66
+
+TEMP_CELSIUS_REG        = 0x00
+TEMP_FAHREN_REG         = 0x04
+TEMP_INT_CELSIUS_REG    = 0x10
+TEMP_INT_FAHREN_REG     = 0x14
+TEMP_READY_REG          = 0x20
+TEMP_STR_CELSIUS_REG    = 0x30
+TEMP_STR_FAHREN_REG     = 0x40
+TEMP_INTSTR_CELSIUS_REG = 0x50
+TEMP_INTSTR_FAHREN_REG  = 0x60
+FIRM_VER_REG            = 0xFE
+I2C_ADDR_REG            = 0xFF
+
+
+class KMETER_ISOUnit:
+    def __init__(self, i2c: Union[I2C, PAHUBUnit], addr=KMETER_ADDR):
+        """! Kmeter Initialize Function
+             addr: 1 ~ 127
+        """
+        self.kmeter_i2c = i2c
+        if addr >= 0x01 and addr <= 0x7F:
+            self.unit_addr = addr
+        if not (self.unit_addr in self.kmeter_i2c.scan()):
+            raise UnitError("Kmeter iso unit maybe not connect")
+    
+    def get_kmeter_thermo(self, temp=0):
+        """! get thermocouple temperature value."""
+        buff = self.kmeter_i2c.readfrom_mem(self.unit_addr, TEMP_CELSIUS_REG + (4*temp), 4)
+        return round((self.int_convert(buff)/100), 2)
+
+    def get_kmeter_internal(self, temp=0):
+        """! get internal temperature value."""
+        buff = self.kmeter_i2c.readfrom_mem(self.unit_addr, TEMP_INT_CELSIUS_REG + (4*temp), 4)
+        return round(self.int_convert(buff)/100, 2)
+    
+    @property
+    def get_data_available_status(self):
+        """! get temperature measurement value is ready? """
+        status = self.kmeter_i2c.readfrom_mem(self.unit_addr, TEMP_READY_REG, 1)[0]
+        return False if status else True
+
+    def get_kmeter_thermo_string(self, temp=0):
+        """! get thermocouple temperature string value."""
+        return self.kmeter_i2c.readfrom_mem(self.unit_addr, TEMP_STR_CELSIUS_REG + (temp*0x10), 1).decode() + str(float(self.kmeter_i2c.readfrom_mem(self.unit_addr, TEMP_STR_CELSIUS_REG + (temp*0x10), 8).decode()))
+    
+    def get_kmeter_internal_string(self, temp=0):
+        """! get internal temperature string value."""
+        return self.kmeter_i2c.readfrom_mem(self.unit_addr, TEMP_INTSTR_CELSIUS_REG + (temp*0x10), 1).decode()+str(float(self.kmeter_i2c.readfrom_mem(self.unit_addr, TEMP_INTSTR_CELSIUS_REG + (temp*0x10), 8).decode()))
+    
+    def get_device_spec(self, mode) -> int:
+        """! Get device firmware version and i2c address.
+           mode: 0xFE and 0xFF 
+        """
+        if mode >= FIRM_VER_REG and mode <= I2C_ADDR_REG:
+            return  self.kmeter_i2c.readfrom_mem(self.unit_addr, mode, 1)[0]
+    
+    def set_i2c_address(self, addr) -> None:
+        """! Set i2c address.
+           addr:  1 to 127 
+        """
+        if addr >= 0x01 and addr <= 0x7F:
+            if addr != self.unit_addr:
+                self.kmeter_i2c.writeto_mem(self.unit_addr, I2C_ADDR_REG, struct.pack('b', addr))
+                self.unit_addr = addr
+                time.sleep_ms(200)
+                
+    def int_convert(self, value):
+        return struct.unpack('<i', value)[0]
+    

m5stack/libs/unit/manifest.py

@@ -51,6 +51,7 @@
         "vmeter.py",
         "ameter.py",
         "weight_i2c.py",
+        "kmeter_iso.py",
     ),
     base_path="..",
     opt=0,