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import serial, time
port = serial.Serial('/dev/ttyACM0', baudrate=57600, timeout=2)
data = '01234567890123456789012345678901234567890123456789'
#data = 'hellohello'
outLine = 'echo %s\n' % data
port.write('\n\n\n')
port.write('free\n')
line = port.readline(80)
while line != '':
print(line)
line = port.readline(80)
i = 0
bytesOut = 0
bytesIn = 0
startTime = time.time()
lastPrint = startTime
while True:
bytesOut += port.write(outLine)
line = port.readline(80)
bytesIn += len(line)
# check command line echo
if (data not in line):
print('command error %d: %s' % (i,line))
#break
# read echo output
line = port.readline(80)
if (data not in line):
print('echo output error %d: %s' % (i,line))
#break
bytesIn += len(line)
#print('%d: %s' % (i,line))
#print('%d: bytesOut: %d, bytesIn: %d' % (i, bytesOut, bytesIn))
elapsedT = time.time() - lastPrint
if (time.time() - lastPrint >= 5):
outRate = bytesOut / elapsedT
inRate = bytesIn / elapsedT
usbRate = (bytesOut + bytesIn) / elapsedT
lastPrint = time.time()
print('elapsed time: %f' % (time.time() - startTime))
print('data rates (bytes/sec): out: %f, in: %f, total: %f' % (outRate, inRate, usbRate))
bytesOut = 0
bytesIn = 0
i += 1
#if (i > 2): break
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