Add current thermocouple reading code

2014-10-15 18:23:03 +00:00 · 2014-10-15 18:23:03 +00:00 · 4bc3309b92
commit 4bc3309b92
--- a/kiln/server.py
+++ b/kiln/server.py
@ -0,0 +1,34 @@
+import time
+import tornado.ioloop
+import tornado.web
+
+device_file = "/sys/bus/w1/devices/3b-000000182b57/w1_slave"
+def read_temp_raw():
+	f = open(device_file, 'r')
+	lines = f.readlines()
+	f.close()
+	return lines
+ 
+def read_temp():
+	lines = read_temp_raw()
+	while lines[0].strip()[-3:] != 'YES':
+		time.sleep(0.2)
+		lines = read_temp_raw()
+	equals_pos = lines[1].find('t=')
+	if equals_pos != -1:
+		temp_string = lines[1][equals_pos+2:]
+		temp_c = float(temp_string) / 1000.0
+		temp_f = temp_c * 9.0 / 5.0 + 32.0
+		return temp_c, temp_f
+
+class MainHandler(tornado.web.RequestHandler):
+    def get(self):
+        self.write("<!doctype html><head><meta http-equiv='refresh' content='5' ></head><p>Current temperature: %.2f&deg;C, %.2f&deg;F"%read_temp())
+
+application = tornado.web.Application([
+    (r"/", MainHandler),
+])
+
+if __name__ == "__main__":
+    application.listen(8888)
+    tornado.ioloop.IOLoop.instance().start()