From 0b669ba65559c8c109480e2d8cc410cd5e6bc53e Mon Sep 17 00:00:00 2001
From: Jens Ahrensfeld <jens@jayfield.org>
Date: Sun, 31 Mar 2019 06:39:59 +0000
Subject: [PATCH] Bugfixes to temperature

git-svn-id: http://moon:8086/svn/projects/HendiControl@191 fda53097-d464-4ada-af97-ba876c37ca34
---
 Control/brewpi/max31865.py   | 5 +++--
 Control/brewpi/tempLogger.py | 7 +++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/Control/brewpi/max31865.py b/Control/brewpi/max31865.py
index 4f4554e..1b07e19 100755
--- a/Control/brewpi/max31865.py
+++ b/Control/brewpi/max31865.py
@@ -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
 
diff --git a/Control/brewpi/tempLogger.py b/Control/brewpi/tempLogger.py
index ce590b6..8ebead9 100644
--- a/Control/brewpi/tempLogger.py
+++ b/Control/brewpi/tempLogger.py
@@ -1,3 +1,4 @@
+import time
 import numpy as np
 from max31865 import Max31865
 from matplotlib.pyplot import figure, clf, plot, xlabel, ylabel, xlim, ylim, title, grid, axes, show, subplot
@@ -11,9 +12,10 @@ class TempLogger():
 	def run(self, dt, duration):
 
 		for t in range(0, duration):
-			temp = self.tempSensor.sensor()
-			print ("Current temperature is {:0.2f} °C", format(temp))
+			temp = self.sensor.getTemperature()
+			print ("Current temperature is {:0.2f} °C".format(temp))
 			self.temps = np.append(self.temps, temp)
+			time.sleep(dt)
 
 
 if __name__ == '__main__':
@@ -21,3 +23,4 @@ if __name__ == '__main__':
 	logger.run(1, 10)
 
 	print("End of program")
+