added temperature aquisition from newport i800 series controller

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()
+