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smaemtest.py
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import socket
import struct
import binascii
import struct
import influxdb
import time
import threading
MCAST_GRP = '239.12.255.254'
MCAST_PORT = 9522
db_client=influxdb.InfluxDBClient('localhost', database='sma_em')
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(('', MCAST_PORT))
mreq = struct.pack("4sl", socket.inet_aton(MCAST_GRP), socket.INADDR_ANY)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
sock.settimeout(10)
def log_to_influx(sock, db_client):
threading.Timer(1.0, log_to_influx, args=[sock, db_client]).start()
try:
smainfo=sock.recv(600)
deg=smainfo[28:]
smatext={}
currtime = int(time.time())
while len(deg)>8:
index=struct.unpack('>b',deg[1:2])[0]
bytesnext=struct.unpack('>b',deg[2:3])[0]
deg=deg[4:]
if bytesnext==4:
smatext[str(index) +'.'+str(bytesnext)]=struct.unpack('>I',deg[0:bytesnext])[0]
elif bytesnext==8:
smatext[str(index) +'.'+str(bytesnext)]=struct.unpack('>q',deg[0:bytesnext])[0]
deg=deg[bytesnext:]
print smatext
json_body = [
{
"measurement": "grid",
"tags": {
"phase": "SUMS",
},
"fields": {
"active_power+": smatext['1.4']/10.0,
"active_power-": smatext['2.4']/10.0,
"reactive_power+": smatext['3.4']/10.0,
"reactive_power-": smatext['4.4']/10.0,
"apparent_power+": smatext['9.4']/10.0,
"apparent_power-": smatext['10.4']/10.0,
"power_factor": smatext['13.4']/1000.0,
}
},
{
"measurement": "grid",
"tags": {
"phase": "L1",
},
"fields": {
"active_power+": smatext['21.4']/10.0,
"active_power-": smatext['22.4']/10.0,
"reactive_power+": smatext['23.4']/10.0,
"reactive_power-": smatext['24.4']/10.0,
"apparent_power+": smatext['29.4']/10.0,
"apparent_power-": smatext['30.4']/10.0,
"current": smatext['31.4']/1000.0,
"voltage": smatext['32.4']/1000.0,
"power_factor": smatext['33.4']/1000.0,
}
},
{
"measurement": "grid",
"tags": {
"phase": "L2",
},
"fields": {
"active_power+": smatext['41.4']/10.0,
"active_power-": smatext['42.4']/10.0,
"reactive_power+": smatext['43.4']/10.0,
"reactive_power-": smatext['44.4']/10.0,
"apparent_power+": smatext['49.4']/10.0,
"apparent_power-": smatext['50.4']/10.0,
"current": smatext['51.4']/1000.0,
"voltage": smatext['52.4']/1000.0,
"power_factor": smatext['53.4']/1000.0,
}
},
{
"measurement": "grid",
"tags": {
"phase": "L3",
},
"fields": {
"active_power+": smatext['61.4']/10.0,
"active_power-": smatext['62.4']/10.0,
"reactive_power+": smatext['63.4']/10.0,
"reactive_power-": smatext['64.4']/10.0,
"apparent_power+": smatext['69.4']/10.0,
"apparent_power-": smatext['70.4']/10.0,
"current": smatext['71.4']/1000.0,
"voltage": smatext['72.4']/1000.0,
"power_factor": smatext['73.4']/1000.0,
}
},
]
print json_body
# db_client.write_points(json_body)
finally:
pass
log_to_influx(sock, db_client)