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1 #!/usr/bin/env python2.7 |
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2 |
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3 BTADDR = "00:12:03:27:70:88" |
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4 SLEEP_TIME = 5 |
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5 # time that the bluetooth takes to get going? |
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6 EXTRA_WAKEUP = 0 |
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7 |
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8 FETCH_TRIES = 3 |
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9 |
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10 # avoid turning off the bluetooth etc. |
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11 TESTING = False |
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12 |
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13 import sys |
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14 # for wrt |
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15 sys.path.append('/root/python') |
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16 import httplib |
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17 import time |
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18 import traceback |
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19 import binascii |
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20 import hmac |
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21 import zlib |
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22 import urllib |
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23 import urllib2 |
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24 |
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25 import config |
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26 |
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27 from utils import monotonic_time, retry, readline, crc16 |
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28 |
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29 lightblue = None |
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30 try: |
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31 import lightblue |
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32 except ImportError: |
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33 import bluetooth |
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34 |
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35 def get_socket(addr): |
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36 if lightblue: |
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37 s = lightblue.socket() |
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38 s.connect((addr, 1)) |
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39 s.settimeout(3) |
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40 else: |
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41 s = bluetooth.BluetoothSocket( bluetooth.RFCOMM ) |
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42 s.connect((addr, 1)) |
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43 |
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44 s.setblocking(False) |
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45 |
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46 return s |
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47 |
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48 |
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49 @retry() |
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50 def fetch(sock): |
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51 print "fetch" |
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52 sock.send("fetch\n") |
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53 |
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54 crc = 0 |
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55 |
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56 lines = [] |
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57 l = readline(sock) |
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58 if l != 'START\n': |
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59 print>>sys.stderr, "Bad expected START line '%s'\n" % l.rstrip('\n') |
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60 return None |
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61 crc = crc16(l, crc) |
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62 |
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63 while True: |
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64 l = readline(sock) |
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65 |
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66 crc = crc16(l, crc) |
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67 |
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68 if l == 'END\n': |
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69 break |
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70 |
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71 lines.append(l.rstrip('\n')) |
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72 |
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73 print lines |
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74 |
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75 l = readline(sock) |
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76 recv_crc = None |
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77 try: |
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78 k, v = l.rstrip('\n').split('=') |
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79 print k,v |
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80 if k == 'CRC': |
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81 recv_crc = int(v) |
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82 if recv_crc < 0 or recv_crc > 0xffff: |
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83 recv_crc = None |
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84 except ValueError: |
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85 pass |
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86 |
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87 if recv_crc is None: |
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88 print>>sys.stderr, "Bad expected CRC line '%s'\n" % l.rstrip('\n') |
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89 return None |
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90 |
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91 if recv_crc != crc: |
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92 print>>sys.stderr, "Bad CRC: calculated 0x%x vs received 0x%x\n" % (crc, recv_crc) |
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93 return None |
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94 |
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95 return lines |
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96 |
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97 @retry() |
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98 def turn_off(sock): |
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99 if TESTING: |
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100 return 99 |
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101 print>>sys.stderr, "sending btoff" |
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102 sock.send("btoff\n"); |
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103 # read newline |
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104 l = readline(sock) |
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105 if not l: |
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106 print>>sys.stderr, "Bad response to btoff\n" |
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107 return None |
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108 |
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109 if not l.startswith('off:'): |
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110 print>>sys.stderr, "Bad response to btoff '%s'\n" % l |
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111 return None |
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112 off, next_wake = l.rstrip().split(':') |
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113 print>>sys.stderr, "Next wake %s" % next_wake |
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114 |
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115 return int(next_wake) |
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116 |
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117 @retry() |
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118 def clear_meas(sock): |
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119 sock.send("clear\n"); |
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120 l = readline(sock) |
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121 if l and l.rstrip() == 'cleared': |
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122 return True |
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123 |
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124 print>>sys.stderr, "Bad response to clear %s\n" % str(l) |
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125 return False |
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126 |
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127 def send_results(lines): |
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128 enc_lines = binascii.b2a_base64(zlib.compress('\n'.join(lines))) |
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129 mac = hmac.new(config.HMAC_KEY, enc_lines).hexdigest() |
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130 |
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131 url_data = urllib.urlencode( {'lines': enc_lines, 'hmac': mac} ) |
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132 con = urllib2.urlopen(config.UPDATE_URL, url_data) |
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133 result = con.read(100) |
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134 if result == 'OK': |
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135 return True |
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136 else: |
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137 print>>sys.stderr, "Bad result '%s'" % result |
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138 return False |
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139 |
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140 def do_comms(sock): |
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141 args = sys.argv[1:] |
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142 print "do_comms" |
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143 for a in args: |
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144 sock.send('%s\n' % a) |
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145 |
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146 while True: |
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147 l = readline(sock) |
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148 print l |
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149 |
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150 testcount = 0 |
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151 |
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152 def sleep_for(secs): |
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153 until = monotonic_time() + secs |
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154 while True: |
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155 length = until - monotonic_time() |
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156 if length <= 0: |
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157 return |
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158 time.sleep(length) |
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159 |
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160 def main(): |
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161 next_wake_time = 0 |
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162 |
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163 while True: |
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164 sock = None |
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165 try: |
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166 sock = get_socket(BTADDR) |
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167 except Exception, e: |
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168 print>>sys.stderr, "Error connecting:" |
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169 traceback.print_exc(file=sys.stderr) |
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170 sleep_time = SLEEP_TIME |
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171 if sock: |
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172 next_wake = None |
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173 try: |
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174 next_wake_interval = do_comms(sock) |
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175 next_wake_time = time.time() + next_wake_interval |
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176 except Exception, e: |
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177 print>>sys.stderr, "Error in do_comms:" |
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178 traceback.print_exc(file=sys.stderr) |
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179 if next_wake_time > time.time(): |
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180 sleep_time = min(next_wake_time - time.time() - EXTRA_WAKEUP, sleep_time) |
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181 |
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182 print "Sleeping for %d" % sleep_time |
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183 sleep_for(sleep_time) |
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184 |
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185 if __name__ == '__main__': |
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186 main() |
