Now broadcasting in python.

in_python/bmp180.py

@@ -3,11 +3,12 @@
 #
 #           bmp180.py
 #  Read data from a digital pressure sensor.
-#  And broadcast to network.
+#  And broadcast to local network.
 #  Author : Jony Silva
 #  Date   : Wed 12 Jul 21:03:26 UTC 2017
 #
-#  Reading the chip code taken from :
+#  All the credit for the code to read 
+#  the chip BMP180 goes to:
 #  http://www.raspberrypi-spy.co.uk/
 #
 #--------------------------------------
@@ -17,19 +18,17 @@ from socket import *
 from ctypes import c_short
  
 DEVICE = 0x77 # Default device I2C address
+
+# Interval sending in seconds between broadcasts
+SEND_TIMING = 1
  
 # addressing information of target
 IPADDR = '<broadcast>'
-PORTNUM = 10000
+PORTNUM = 10000 
  
 #bus = smbus.SMBus(0)  # Rev 1 Pi uses 0
 bus = smbus.SMBus(1) # Rev 2 Pi uses 1 
  
-def convertToString(data):
-	# Simple function to convert binary data into
-	# a string
-	return str((data[1] + (256 * data[0])) / 1.2)
-
 def getShort(data, index):
 	# return two bytes from data as a signed 16-bit value
 	return c_short((data[index] << 8) + data[index + 1]).value
@@ -38,12 +37,6 @@ def getUshort(data, index):
 	# return two bytes from data as an unsigned 16-bit value
 	return (data[index] << 8) + data[index + 1]
 
-def readBmp180Id(addr=DEVICE):
-	# Chip ID Register Address
-	REG_ID     = 0xD0
-	(chip_id, chip_version) = bus.read_i2c_block_data(addr, REG_ID, 2)
-	return (chip_id, chip_version)
-  
 def readBmp180(addr=DEVICE):
 	# Register Addresses
 	REG_CALIB  = 0xAA
@@ -56,7 +49,6 @@ def readBmp180(addr=DEVICE):
 	# Oversample setting
 	OVERSAMPLE = 3    # 0 - 3
 
-	# Read calibration data
 	# Read calibration data from EEPROM
 	cal = bus.read_i2c_block_data(addr, REG_CALIB, 22)
 
@@ -116,30 +108,19 @@ def readBmp180(addr=DEVICE):
 
 def main():
     
-	(chip_id, chip_version) = readBmp180Id()
-	print("Chip ID     : {0}".format(chip_id))
-	print("Version     : {0}".format(chip_version))
-
-	print
-
-	(temperature,pressure) = readBmp180()
-	temp = "Temperature : {0} C".format(temperature)
-	press = "Pressure    : {0} mbar".format(pressure) 
-
-	print temp
-	print press
-
-	# initialize a socket, think of it as a cable
-	# SOCK_DGRAM specifies that this is UDP
 	s = socket(AF_INET, SOCK_DGRAM)
-
-	s.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1)
 	s.setsockopt(SOL_SOCKET, SO_BROADCAST, 1)
-	s.sendto(temp, (IPADDR, PORTNUM))
+
+	print "Broadcasting Temperature and Pressure on Port:", (PORTNUM)
+
+	while 1:
+		(temperature,pressure) = readBmp180()
+		temp = "Temperature : {0} C".format(temperature)
+		press = "Pressure    : {0} mbar".format(pressure)
+		s.sendto(temp+'\n'+press+'\n', (IPADDR, PORTNUM))
+		time.sleep(SEND_TIMING)
+
 	 
-	# close the socket
-	s.close()
-  
 if __name__=="__main__":
    main()