Repository navigation
Expand file tree
/
Copy pathUIDataWebsocket.py
More file actions
281 lines (254 loc) · 10.4 KB
/
Copy pathUIDataWebsocket.py
File metadata and controls
281 lines (254 loc) · 10.4 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
# Data Retrieval
from flask import Flask, abort
import redis as red
import json, sys
import itertools
# Websocket
import asyncio
import websockets as ws
import re
import time
# For Debugging
import logging
# logger = logging.getLogger('websockets')
# logger.setLevel(logging.DEBUG)
# logger.addHandler(logging.StreamHandler())
# logging.basicConfig(filename="G:\CSUS\LPG\debug\log.txt")
#test
# Websockets Server
async def main():
print("Main")
async with ws.serve(producer_handler, port=3003):
print("ws")
try:
print("Trying to run forever")
await asyncio.Future() # run forever
except ws.exceptions.ConnectionClosed:
print("Connection close")
pass
except asyncio.exceptions.CancelledError:
print("Connection cancelled?")
pass
async def producer_handler(websocket, path):
# Produce sensor data for the websocket
# Need to start from the beginning for each websocket client
Loop_starter = 0
print("sensor producer start")
baseTime = time.time()
ping = True
while True:
# Package sensor and valve data
# print("Looping...")
# Debug limiter on loop speed:
# await asyncio.sleep(.1)
try:
# From the sensor producer
sensor_message = await sensor_producer(Loop_starter)
# print(sensor_message)
# And the valve producer
# valve_message = await valve_producer(Loop_starter)
# After the initial loop, change the condition
Loop_starter = 1
except ws.exceptions.ConnectionClosed:
print("Connection closed1")
pass
except asyncio.exceptions.CancelledError:
print("Connection cancelled?")
pass
# Then send it through websocket to client
# Sensor:
try:
# count = count + 1
# print("Item " + str(count) + ":")
# print(item)
# print(json.dumps({'message': message}))
if not sensor_message:
# Check if client is still alive
# print("Pinging client")
await websocket.ping()
else:
# Send the messages
# print(sensor_message)
await websocket.send(json.dumps({'message': sensor_message}))
# Don't overload the websocket (race condition?)
await asyncio.sleep(.1)
# Confirm reception of the data frame
response = await websocket.recv()
print(response)
except ws.exceptions.ConnectionClosed:
print("Connection closed2")
await websocket.close()
return
# Valve:
# try:
# # count = count + 1
# # print("Item " + str(count) + ":")
# # print(item)
# # print(json.dumps({'message': message}))
# if not valve_message:
# # Check if client is still alive
# # print("Pinging client")
# await websocket.ping()
# else:
# # Send the messages
# await websocket.send(json.dumps({'message': valve_message}))
# print("MESSAGE SENT")
# await asyncio.sleep(.1)
# except ws.exceptions.ConnectionClosed:
# print("Connection closed")
# await websocket.close()
# return
currentTime = time.time()
elapsed = currentTime - baseTime
if elapsed >= 5:
# Request update from client
await websocket.send(json.dumps({'message': 'PING'}))
try:
await asyncio.wait_for(websocket.recv(), timeout = 5.0)
except asyncio.TimeoutError:
print('CLIENT TIMED OUT')
await websocket.close()
break
baseTime = time.time()
# Loop for grabbing information from the Pi-hosted redis sensor_stream
async def sensor_producer(Loop_starter):
# print("=============================")
global sensor_data
global sensor_label
# When starting the loop, reach all the way back to the start of the stream and package that data
try:
if Loop_starter == 0:
print("initial loop")
# Grab the first item to establish the range for XREAD
sensor_data = redis.xrange(sensor_stream_name, count=1)
(sensor_label,sensor_data) = sensor_data[0]
# Grab all the most recent XREAD data starting from the XRANGE
sensor_data = redis.xread({ sensor_stream_name: f'{sensor_label.decode()}' }, block=0)
(sensor_label,sensor_data) = sensor_data[0]
else:
# Grab the next set of data, starting after the most recent already read stream item
sensor_data = redis.xrange(sensor_stream_name, min=f'{sensor_label.decode()}', count=1)
(sensor_label,sensor_data) = sensor_data[0]
sensor_data = redis.xread({ sensor_stream_name: f'{sensor_label.decode()}'}, block=1)
(sensor_label,sensor_data) = sensor_data[0]
except IndexError:
# There is no new data to push
# print("INDEX ERROR")
return []
except NameError:
print("Didn't initally loop")
return []
except ws.exceptions.ConnectionClosed:
print("Connection Closed")
pass
except asyncio.exceptions.CancelledError:
print("Connection cancelled?")
pass
# Iterate through the chunk of 'new' data
data_package = []
# Grab only every nth element for packaging
n = 5
for sensor_reading in itertools.islice(sensor_data,None,None,n):
(sensor_label, sensor_data) = sensor_reading
sensor_timestamp = re.split("-", sensor_label.decode())
# print(sensor_reading)
data_buffer = {'Timestamp': f"{sensor_timestamp[0]}",
'PT_HE': f"{sensor_data[b'PT_HE'].decode()}",
# 'PT_Purge': f"{sensor_data[b'PT_Purge'].decode()}",
'PT_LOX_2': f"{sensor_data[b'PT_LOX_2'].decode()}",
'PT_FUEL_PV': f"{sensor_data[b'PT_FUEL_PV'].decode()}",
'PT_LOX_PV': f"{sensor_data[b'PT_LOX_PV'].decode()}",
'PT_FUEL_INJ': f"{sensor_data[b'PT_FUEL_INJ'].decode()}",
'PT_CHAM': f"{sensor_data[b'PT_CHAM'].decode()}",
'TC_FUEL_PV': f"{sensor_data[b'TC_FUEL_PV'].decode()}",
'TC_LOX_PV': f"{sensor_data[b'TC_LOX_PV'].decode()}",
# 'TC_LOX_Valve_Main': f"{sensor_data[b'TC_LOX_Valve_Main'].decode()}",
'TC_WATER_In': f"{sensor_data[b'TC_WATER_In'].decode()}",
'TC_WATER_Out': f"{sensor_data[b'TC_WATER_Out'].decode()}",
'TC_CHAM': f"{sensor_data[b'TC_CHAM'].decode()}",
#'RC_LOX_Level': f"{sensor_data[b'RC_LOX_Level'].decode()}",
'FT_Thrust': f"{sensor_data[b'FT_Thrust'].decode()}"
}
# print(data_buffer)
data_package.append(data_buffer)
#print(label)
#print(data)
# Pipe to websocket
print("Websocketed Sensor Data")
print("========================")
# print(data_package)
# await websocket.send('test')
return data_package
async def valve_producer(Loop_starter):
# print("=============================")
global valve_data
global valve_label
try:
if Loop_starter == 0:
# Grab the first item to establish the range for XREAD
valve_data = redis.xrange(valve_stream_name, count=1)
(valve_label,valve_data) = valve_data[0]
# Grab all the most recent XREAD data starting from the XRANGE
valve_data = redis.xread({ valve_stream_name: f'{valve_label.decode()}' }, block=0)
# print(valve_data)
(valve_label,valve_data) = valve_data[0]
else:
# Grab the next set of data, starting after the most recent already read stream item
valve_data = redis.xrange(valve_stream_name, min=f'{valve_label.decode()}', count=1)
(valve_label,valve_data) = valve_data[0]
valve_data = redis.xread({ valve_stream_name: f'{valve_label.decode()}'}, block=1)
(valve_label, valve_data) = valve_data[0]
except IndexError:
# print("Index error")
return []
except NameError:
print("Didn't initally loop")
return []
except ws.exceptions.ConnectionClosed:
pass
except asyncio.exceptions.CancelledError:
pass
# Iterate through the chunk of 'new' data
data_package = []
for valve_reading in valve_data:
(valve_label, valve_data) = valve_reading
valve_timestamp = re.split("-", valve_label.decode())
data_buffer = {'Timestamp': f"{valve_timestamp[0]}",
'FUEL_Press': f"{valve_data[b'FUEL_Press'].decode()}",
'LOX_Press': f"{valve_data[b'LOX_Press'].decode()}",
'FUEL_Vent': f"{valve_data[b'FUEL_Vent'].decode()}",
'LOX_Vent': f"{valve_data[b'LOX_Vent'].decode()}",
'MAIN': f"{valve_data[b'MAIN'].decode()}",
'FUEL_Purge': f"{valve_data[b'FUEL_Purge'].decode()}",
'LOX_Purge': f"{valve_data[b'LOX_Purge'].decode()}",
'IGNITE': f"{valve_data[b'IGNITE'].decode()}",
'WATER_Flow': f"{valve_data[b'WATER_Flow'].decode()}"
}
# print(data_buffer)
data_package.append(data_buffer)
#print(label)
#print(data)
# Pipe to websocket
print("Websocketed Valve Update")
print("========================")
print(data_package)
# await websocket.send('test')
return data_package
# Create redis client for fetching data
# Use the Raspberry Pi IP, should be static
redis = red.Redis(host='redis-db', port=6379)
# While loop control variable
Operation = True
# Redis Stream ID
sensor_stream_name = 'sensor_stream'
valve_stream_name = 'valve_stream'
# Global var
global sensor_data
sensor_data = ''
global sensor_label
global valve_data
valve_data = ''
global valve_label
# Run the websocket server
print("Run server")
asyncio.run(main())