First commit, working skeleton

Tested to perform smoothly over a 'ssh -XYC' connection. Hard-coded /dev/ttyUSBn location, ideally it isn't changed too often for a given setup.

CrateControl.py

@@ -0,0 +1,138 @@
+'''
+v0.1 notes
+---------
+Relies on /dev/ttyUSB<N> channel being available to the user. Do it by running the command
+
+sudo adduser <username> dialout
+
+and logging out, then logging back in. Look at the output of ls /dev/ttyUSB* on a terminal before
+and after plugging in the USB cable to the PC, to find out which channel to use in the input below.
+
+'''
+
+import serial
+import time
+import tkinter as tk
+import ttkbootstrap as ttk
+from ttkbootstrap.constants import *
+
+port_name = '/dev/ttyUSB0'
+baud_rate = 9600
+timeout = 2
+
+commands = {
+    "turn on": "$CMD:SET,CH:8,PAR:ON\n".encode('utf-8'),
+    "turn off": "$CMD:SET,CH:8,PAR:OFF\n".encode('utf-8'),
+    "get name": "$CMD:MON,CH:8,PAR:CRNAME\n".encode('utf-8')
+}
+
+class CrateControl(ttk.Frame):
+    def __init__(self,master):
+        super().__init__(master, padding=20)
+        try:
+            self.ser = serial.Serial(port=port_name,baudrate=baud_rate,timeout=timeout)
+        except serial.SerialException as e:
+            print(f"Error opening serial port: {e}")
+            self.destroy()
+            quit()
+        except Exception as e:
+            print(f"An unexpected error occurred: {e}")
+            self.destroy()
+            quit()
+        print(self.ser)
+
+        self.freeze_frame=False
+        self.last_return_string=""
+        self.style = ttk.Style()
+        self.style.configure('big.success-round-toggle.TCheckbutton',font=('Verdana',18),indicatorsize=40,padding=10)
+
+        self.name_of_crate = self.poll(8,"CRNAME","")
+
+        self.onoff_status = tk.IntVar(value=0)
+        self.status_label = ttk.Label(self, text="Ready",bootstyle="info",justify=LEFT)
+        self.onoff_button = ttk.Checkbutton(self,
+                                text=self.name_of_crate,
+                                variable=self.onoff_status,
+                                onvalue=1,
+                                offvalue=0,
+                                width=20,
+                                #style='success-round-toggle.Checkbutton',
+                                command=self.toggle_onoff,
+                                bootstyle='big success-round-toggle')
+        self.status_label.pack(expand=YES,fill=X,pady=10)
+        self.onoff_button.pack(expand=YES,fill=X,pady=10)
+        self.refresh_monitors()
+
+        #print('test')
+        #self.after(200,self.eventloop)
+        #self.refresh_monitors()
+
+    def poll(self, channel, polstring,replystring=""):
+        #while(self.ser.in_waiting > 0):
+        #    self.ser.readline()
+        self.ser.write(str("$CMD:MON,CH:"+str(channel)+",PAR:"+polstring+"\n").encode('utf-8'))
+        retval = self.ser.readline().decode("utf-8").rstrip()
+        #retval = self.read_reply()
+        retval = retval.replace("#CMD:OK,VAL:","")
+        return "%s\t%s\t"%(retval,replystring)
+        #return self.read_reply()
+
+    def refresh_monitors(self):
+        #fullstatus="name: "
+        fullstatus="name\t\tset1\t\tmon1\t\tmon2\n"
+        for i in range(0,3):
+            reply=""
+            name = self.poll(i,"NAME")
+            setv = self.poll(i,"VSET","V")
+            monv = self.poll(i,"VMON","V")
+            moni = self.poll(i,"IMON","A")
+            #reply = name #.replace("#CMD:OK,VAL:"," ")
+            #reply = reply+"\n"
+            fullstatus += (name+setv+monv+moni+"\n")
+        fullstatus+="\t"
+        fullstatus+=self.poll(8,"FAN1","rpm\n")
+        fullstatus+=self.poll(8,"FAN2","rpm\n")
+        fullstatus+=self.poll(8,"FAN3","rpm\n")
+        fullstatus+=self.poll(8,"FUTEMP","C\n")
+        fullstatus+=self.poll(8,"PSTEMP","C\n")
+        status = self.poll(8,"CRST","\n")
+        fanstat = (int(status)&0x200==512)
+        crstat = int(status)&0x1
+        fullstatus+=("fan: %d\t crate: %d"%(fanstat,crstat))
+        if(crstat == 1 and fanstat == 1 and self.onoff_status.get() == 0):
+            self.onoff_status.set(1)
+            self.onoff_button.state(['selected'])
+        while(self.freeze_frame):
+            fullstatus = fullstatus
+        #print(fullstatus,self.freeze_frame)
+        self.status_label.config(text=fullstatus, bootstyle="info")
+        self.after(4000,self.refresh_monitors)
+
+    def read_reply(self):
+        totresp = ""
+        while(self.ser.in_waiting > 0):
+            response = self.ser.readline().decode('utf-8').rstrip() #rstrip gets rid of trailing whitespace
+            totresp = totresp+response
+        self.last_return_string=totresp
+        return totresp
+
+    def toggle_onoff(self):
+        self.freeze_frame=True
+        if(self.onoff_status.get()==1):
+            print("Turn ON")
+            self.ser.write(commands['turn on'])
+            time.sleep(0.2)
+        elif(self.onoff_status.get()==0):
+            print("Turn OFF")
+            self.ser.write(commands['turn off'])
+            time.sleep(0.2)
+        #print(self.read_reply())
+        while(self.ser.in_waiting > 0):
+            self.ser.readline()
+        self.freeze_frame=False
+
+if __name__ == "__main__":
+    root = ttk.Window(themename='flatly',title="CrateControl")
+    app = CrateControl(root) #ttk.Window("Crate Control")
+    app.pack(expand=True,fill=BOTH)
+    root.mainloop()