Bugfixes to temperature

git-svn-id: http://moon:8086/svn/projects/HendiControl@191 fda53097-d464-4ada-af97-ba876c37ca34
2019-03-31 06:39:59 +00:00
parent 25ba72acff
commit 0b669ba655
2 changed files with 8 additions and 4 deletions
@@ -11,6 +11,7 @@ class Max31865():
 		self.spi.max_speed_hz = 100000
 		self.spi.mode = 0b01
 		self.write_reg(0x00, 0xA3)
+		self.temp_correction = -0.2

 	def read_reg(self, addr):
 		reg = self.spi.xfer([addr, 0xFF])
@@ -29,8 +30,8 @@ class Max31865():

 	def getTemperature(self):
 		digits = self.read_digits()
-		R = max31865.calc_R(430, digits)
-		T = max31865.vanDusen_temp(R)
+		R = Max31865.calc_R(430, digits)
+		T = Max31865.vanDusen_temp(R) + self.temp_correction
 		print("R={:.3f} Ohm, T={:.2f} degC".format(R, T))
 		return T