# ================================================
# ABElectronics ADC Pi 8-Channel ADC demo
# Version 1.0 Created 09/05/2014
#
# Requires python smbus to be installed
# run with: python demo-readvoltage.py
# ================================================
# Initialise the ADC device using the default addresses and sample rate, change this value if you have changed the address selection jumpers
# Sample rate can be 12,14, 16 or 18
adc = ADCPi(0x68, 0x69, 12)
while (True):
# clear the console
os.system('clear')
# read from adc channels and print to screen
print ("Channel 1: %02f" % adc.readVoltage(1))
print ("Channel 2: %02f" % adc.readVoltage(2))
print ("Channel 3: %02f" % adc.readVoltage(3))
print ("Channel 4: %02f" % adc.readVoltage(4))
print ("Channel 5: %02f" % adc.readVoltage(5))
print ("Channel 6: %02f" % adc.readVoltage(6))
print ("Channel 7: %02f" % adc.readVoltage(7))
print ("Channel 8: %02f" % adc.readVoltage(8))
# wait 0.5 seconds before reading the pins again
time.sleep(0.5)
last_df_write = ""
while inputs:
# Wait for at least one of the sockets to be ready for processing
# or timeout of 1 second
print >>sys.stderr, '\nwaiting for the next event'
readable, writable, exceptional = select.select(inputs, outputs, inputs, 1)
if not (readable or writable or exceptional):
print >>sys.stderr, ' timed out, go collect some data'
try:
if args.test:
v = uniform(0.4,5.05)
time.sleep(1)
else:
v = adc.readVoltage(args.adcchannel)
if len(rawReadings) >= args.nsamples:
del rawReadings[0]
rawReadings.append(v)
if len(rawReadings) > 0 :
average = math.fsum(rawReadings)/len(rawReadings)
if args.debug:
print >> sys.stderr, "{:.4f},{:.4f}".format(v,average)
if len(rawReadings) == 1:
last_df_write = "{},{:.4f},{}\n".format(str(datetime.datetime.now()),average,args.adcchannel)
df.write(last_df_write)
finally:
df.close()
rt.stop()
continue
#
# Requires python smbus to be installed
# run with: python demo-readvoltage.py
# ================================================
# Initialise the ADC device using the default addresses and sample rate, change this value if you have changed the address selection jumpers
# Sample rate can be 12,14, 16 or 18
adc = ADCPi(0x68, 0x69, 18)
def writetofile(texttowrtite):
f = open('adclog.txt', 'a')
f.write(str(datetime.datetime.now()) + " " + texttowrtite)
f.closed
while (True):
# read from adc channels and write to the log file
writetofile ("Channel 1: %02f\n" % adc.readVoltage(1))
writetofile ("Channel 2: %02f\n" % adc.readVoltage(2))
writetofile ("Channel 3: %02f\n" % adc.readVoltage(3))
writetofile ("Channel 4: %02f\n" % adc.readVoltage(4))
writetofile ("Channel 5: %02f\n" % adc.readVoltage(5))
writetofile ("Channel 6: %02f\n" % adc.readVoltage(6))
writetofile ("Channel 7: %02f\n" % adc.readVoltage(7))
writetofile ("Channel 8: %02f\n" % adc.readVoltage(8))
# wait 1 second before reading the pins again
time.sleep(1)
