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| -rw-r--r-- | qolab/hardware/i_server/i800.py | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/qolab/hardware/i_server/i800.py b/qolab/hardware/i_server/i800.py new file mode 100644 index 0000000..c42b5dd --- /dev/null +++ b/qolab/hardware/i_server/i800.py @@ -0,0 +1,45 @@ +""" +This unit talks to i-Series controllers sold by Omega and Newport. +They are often can be connected via iServer interface +Specifically, i853 units with LAN connection, but should be ok with many others +""" + +from qolab.hardware.basic import BasicInstrument +import socket + +class I800(BasicInstrument): + def __init__(self, *args, host='192.168.1.200', port=1000, **kwds): + """ + host - default hostname or IP of the controller unit (192.168.1.200) is factory default + port - socket port (1000 by default) which accept HTTP POST requests + """ + BasicInstrument.__init__(self, *args, **kwds) + self.host=host + self.port=port + self.config['Device type']='TemperatureController' + self.config['Device model'] = 'i800' + self.config['FnamePrefix'] = 'temperature' + self.deviceProperties = {'Temerature'} + + @BasicInstrument.tsdb_append + def getTemperature(self): + s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) + s.connect((self.host, self.port)) + cmd_start_marker='*' + modbus_address='01' + command='X01'; # give decimal representation (X) of the temperature (01 address) + cmnd=f'POST / HTTP/1.1\r\n\r\n{cmd_start_marker}{modbus_address}{command}\r\n' + s.send(cmnd.encode('ascii')) + reply=s.recv(100).decode('ascii') + if reply[0:5] != '01X01': + # check the proper echo response + return None + t = reply[5:] + t = float(t) + return t + + +if __name__ == '__main__': + tc = I800() + tc.getTemperature() + |