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main-3phase.py
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main-3phase.py
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"""
This is ESP8266 micropython script designed to serve ESP8266 as web server showing readings from Microchip MCP39F521.
Script was developed and tested on esp8266-20161110-v1.8.6.bin micropython.
Script listens on port 80 and implements following commands:
'http://<esp8266_ip>' - shows web page with MCP39F521 readings
'http://<esp8266_ip>/json' - sends json formated MCP39F521 readings
'http://<esp8266_ip>/eng_acc=on' - turns ON energy accumulation
'http://<esp8266_ip>/eng_acc=off' - turns OFF energy accumulation (and reset accumulated energy counters)
'http://<esp8266_ip>/reboot' - reboots ESP8266
To setup ESP8266 with micropython pls look on various tutorials. There is plenty of them on Internet
v4.1 09/01/2017
(c) Piotr Oniszczuk
"""
from time import sleep_ms
import socket
from micropython import mem_info
from machine import reset
import MCP39F521
html_page = """<!DOCTYPE html>
<html>
<head>
<title>3-Phase Power</title>
<style>table {width:500px;}
table, th, td {border: 1px solid grey; border-collapse: collapse;}
th, td {padding: 5px; text-align: left;}
table#t01 tr:nth-child(even) { background-color: #eee;}
table#t01 tr:nth-child(odd) {background-color: #fff;}
table#t01 th {background-color: #99e; color: white;}
</style>
</head>
<body><h1>3-Phase Power and Energy</h1>
<table id="t01"><tr><th>Parameter</th><th>R Line</th><th>S Line</th><th>T Line</th></tr>%s</table>
Ver:4.1, Free Mem: %s bytes
</body>
</html>"""
null_page = """%s"""
json_page = """{
"power-and-energy":{
"R_Line":{
%s
"Name":"R"
},
"S_Line":{
%s
"Name":"S"
},
"T_Line":{
%s
"Name":"T"
},
"Resources":{
"Free Mem":%s
}
}
}"""
MCP39F521.control_energy_acc(0, True)
MCP39F521.control_energy_acc(1, True)
MCP39F521.control_energy_acc(2, True)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(('', 80))
s.listen(5)
print('\n-- MCP39F521 3-phase read agent v4.1 (10/01/2017)\n-- (c)Piotr Oniszczuk\n')
mem_info()
print('\n-- Now Listening on port 80...\n')
try:
while True:
conn, addr = s.accept()
print("Got request from %s" % str(addr))
request = conn.recv(1024)
request = str(request)
data_R = MCP39F521.get_data(0)
data_S = MCP39F521.get_data(1)
data_T = MCP39F521.get_data(2)
vals = [['Voltage' ,data_R[2], data_S[2], data_T[2], 'V' ], \
['Current' ,data_R[3], data_S[3], data_T[3], 'A' ], \
['Frequency' ,data_R[4], data_S[4], data_T[4], 'Hz' ], \
['Active Pwr' ,data_R[5], data_S[5], data_T[5], 'W' ], \
['Reactive Pwr' ,data_R[6], data_S[6], data_T[6], 'W' ], \
['Apparent Pwr' ,data_R[7], data_S[7], data_T[7], 'W' ], \
['Power Factor' ,data_R[8], data_S[8], data_T[8], ' ' ], \
['Import Active Eng' ,data_R[9], data_S[9], data_T[9], 'kWh' ], \
['Export Active Eng' ,data_R[10],data_S[10],data_T[10], 'kWh' ], \
['Import Reactive Eng' ,data_R[11],data_S[11],data_T[11], 'kWh' ], \
['Export Reactive Eng' ,data_R[12],data_S[12],data_T[12], 'kWh' ]]
json = request.find('/json')
reboot = request.find('/reboot')
eng_acc_on = request.find('/eng_acc=on')
eng_acc_off = request.find('/eng_acc=off')
if reboot == 6:
html = null_page
response = html % '\n\nRebooting...\n\n'
conn.send(response)
conn.close()
sleep_ms(3000)
reset()
elif json == 6:
html = json_page
rows_R = ['"%s":%.3f,' % (p[0], p[1]) for p in vals]
rows_S = ['"%s":%.3f,' % (p[0], p[2]) for p in vals]
rows_T = ['"%s":%.3f,' % (p[0], p[3]) for p in vals]
response = html % ('\n'.join(rows_R), '\n'.join(rows_S), '\n'.join(rows_T), str(gc.mem_free()))
elif eng_acc_on == 6:
MCP39F521.control_energy_acc(0, True)
MCP39F521.control_energy_acc(1, True)
MCP39F521.control_energy_acc(2, True)
html = null_page
response = html % '\n\nEnergy Acc. ON...\n\n'
elif eng_acc_off == 6:
MCP39F521.control_energy_acc(0, False)
MCP39F521.control_energy_acc(1, False)
MCP39F521.control_energy_acc(2, False)
html = null_page
response = html % '\n\nEnergy Acc. OFF...\n\n'
else:
rows = ['<tr><td>%s</td><td><b>%.3f %s</b></td><td><b>%.3f %s</b></td><td><b>%.3f %s</b></td></tr>' % (p[0], p[1], p[4], p[2], p[4], p[3], p[4]) for p in vals]
html = html_page
response = html % ('\n'.join(rows), str(gc.mem_free()))
conn.sendall(response)
conn.close()
#print('-- Before GC free: {} allocated: {}'.format(gc.mem_free(), gc.mem_alloc()))
gc.collect()
#print('-- After GC free: {} allocated: {}'.format(gc.mem_free(), gc.mem_alloc()))
except:
print ('\n\nException in main server loop. Rebooting...\n\n')
sleep_ms(5000)
reset()