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import os, serial, smtplib
from time import sleep
from sbhs_server.credentials import ADMIN_EMAIL
from sbhs_server.helpers import mailer
MAX_PORTS = 256
MIN_TEMP = 10
MAX_TEMP = 70
def write_to_port(s, com, arg):
s.write(chr(int(com)))
sleep(0.5)
s.write(chr(int(arg)))
sleep(0.5)
def read_from_port(s, com):
s.write(chr(int(com)))
sleep(0.5)
if com == 255:
result = ord(s.read(1)) + (0.1 * ord(s.read(1)))
elif com == 252:
result = ord(s.read(1))
else:
result = -1
sleep(0.5)
return result
def create_message(check_mids, defective_ports):
msg = ''
if len(check_mids) != 0:
msg += 'Please check the following machine ids :\n'
for i,mid in enumerate(check_mids):
msg = msg + str(i) + '. ' + str(mid) + '\n'
if len(defective_ports) != 0:
msg = msg + '\nPlease check the following ports :\n'
for port in defective_ports:
msg = msg + str(port) + '\n'
return msg
def main():
present_online_mids, offline_mids, defective_ports = [], [], []
for i in range(0,MAX_PORTS):
path = '/dev/ttyUSB' + str(i)
if os.path.exists(path):
try:
s = serial.Serial(port=path, baudrate=9600, bytesize=8, parity='N', stopbits=1, timeout=2)
if not s.is_open:
s.open()
assert s.is_open
mid = read_from_port(s, 252) # get machine id
assert mid > 0
write_to_port(s, 253, 100) # set fan speed
write_to_port(s, 254, 0) # set heater value
current_temp = read_from_port(s, 255) # get current temperature
assert current_temp >= MIN_TEMP and current_temp <= MAX_TEMP
present_online_mids.append(mid)
except:
if s.is_open:
if mid > 0:
offline_mids.append(mid)
else:
defective_ports.append(path)
if s.is_open:
s.close()
check_mids = list(set(online_mids).difference(set(present_online_mids)))
msg = create_message(check_mids, defective_ports)
if len(msg) == 0:
msg = "Nothing out of order was detected on the server. :)"
#thread.start_new_thread(mailer.email, (ADMIN_EMAIL, "Health report of SBHS Server", msg))
mailer.email(ADMIN_EMAIL, "Health report of SBHS Server", msg)
#print msg
if __name__ == "__main__":
main()
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