pip3 install modbus_cli

#cat /etc/udev/rules.d/98-usb-serial.rules
KERNEL=="ttyUSB*", ATTRS{idVendor}=="1a86", ATTRS{idProduct}=="7523", OWNER="hass", GROUP="users", MODE="0660", SYMLINK+="rs485"

# 1
# on 
modbus   -b 9600   -s 2  -v   /dev/rs485  c@0=1
# off
modbus   -b 9600   -s 2  -v   /dev/rs485  c@0=0
# status
modbus -b 9600 -s 2  -v /dev/rs485  c@0/8B | egrep -o '\[.*\]' | tr -d '[,]' | cut -f1 -d' '
# 2
# on 
modbus   -b 9600   -s 2  -v   /dev/rs485  c@1=1
# off
modbus   -b 9600   -s 2  -v   /dev/rs485  c@1=0
# status
modbus -b 9600 -s 2  -v /dev/rs485  c@0/8B | egrep -o '\[.*\]' | tr -d '[,]' | cut -f2 -d' '

# /etc/systemd/system/influx-send.service
[Unit]
Description=send data to influx 
After=syslog.target network.target
[Service]
Type=simple
ExecStart=/usr/local/sys/influx/influx-send.sh
[Install]
WantedBy=multi-user.target

#!/bin/bash
while true; do
find /var/spool/emeter -type f -exec sh -c "curl -o /dev/null -w \"%{http_code}\" --user 'username':'password' -sS -X POST http://192.168.110.16:8086/write?db=emeter -d @{} | grep -q  204 && rm  {}" \;
sleep 60
done

voltage,stand=diesel-new,phase=A value=218 1699828098942885595

#!/usr/bin/python3
# -*- coding: utf-8 -*-

import libscrc
import serial
import sys
import struct
def str_to_bytes(data):
    return [hex(ord(c)) for c in data]
port=sys.argv[1]
addr=sys.argv[2]
def get_value(data,port,addr):
    crc16 = libscrc.modbus(data)
    crc16_str = '0x{:04x}'.format(crc16)
    data.append(int(crc16_str[2:][2:4],16))
    data.append(int(crc16_str[2:][0:2],16))
    ser = serial.Serial(port,9600,timeout=0.1,bytesize=8,stopbits=1,parity='N',writeTimeout=0)
    ser.write(data)
    line = ser.read(100)
    ret = (''.join('{:02x}'.format(ord(x)) for x in line))
    val = struct.unpack('>f',line[3:7])[0]
    return "%.3f" % val
    ser.close()
data = bytearray(b'\x00\x04\x00\x00\x00\x02')
data[0]=int(addr)
voltage = get_value(data,port,addr)
data = bytearray(b'\x00\x04\x00\x08\x00\x02')
data[0]=int(addr)
current = get_value(data,port,addr)
data = bytearray(b'\x00\x04\x00\x12\x00\x02')
data[0]=int(addr)
power = get_value(data,port,addr)
data = bytearray(b'\x00\x04\x01\x00\x00\x02')
data[0]=int(addr)
power_total = get_value(data,port,addr)
print("U="+voltage+" I="+current+" P="+power+" W="+power_total+"|U="+voltage+";; I="+current+";; P="+power+";; "+"W="+power_total+";; ")

    upstream backend13 {
    # sticky - link backend by cookies
    # must build nginx with  --add-module=/usr/local/src/nginx-goodies-nginx-sticky-module-ng
    sticky;
    server 127.0.0.1:6001;
    server 127.0.0.1:6002;
    server 127.0.0.1:6003;
    }
    upstream backend47 {
    sticky;
    server 127.0.0.1:6004;
    server 127.0.0.1:6005;
    server 127.0.0.1:6006;
    server 127.0.0.1:6007;
    }
    map $http_x_backend $backend {
    default backend13;
    13      backend13;
    47      backend47;
    }

        location / {
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header Host $host;
            proxy_pass http://$backend;
        }

    set_real_ip_from  127.0.0.1/32;
    real_ip_header    X-Forwarded-For;

curl -c curl_cookie -b curl_cookie -sS  --header "X-Backend: 13" http://192.168.0.65/

curl http://192.168.0.65/index.php
Access denied.

2023/09/10 16:55:16 [error] 8597#8597: *35 FastCGI sent in stderr: "Unable to open primary script: /srv/www/htdocs/6001/index.php (Permission denied)" while reading response header from upstream, client: 192.168.0.57, server: , request: "GET /index.php HTTP/1.0", upstream: "fastcgi://127.0.0.1:9000", host: "192.168.0.65"

su - nginx -s /bin/bash
nginx@zei0mucu:~> cat /srv/www/htdocs/index.php 
<?php
echo $_SERVER['REMOTE_ADDR']
?>

type=AVC msg=audit(1694354225.344:6659): apparmor="DENIED" operation="open" profile="php-fpm" name="/srv/www/htdocs/6001/index.php" pid=32709 comm="php-fpm" requested_mask="r" denied_mask="r" fsuid=484 ouid=484

vim  /etc/apparmor.d/php-fpm

 # the main log file
  /var/log/php*-fpm.log rw,
  # web server files
  /srv/www/htdocs/** r,
  # we need to be able to create all sockets
  @{run}/php{,-fpm}/php*-fpm.pid rw,
  @{run}/php*-fpm.pid rw,
  @{run}/php{,-fpm}/php*-fpm.sock rwlk,

systemctl restart apparmor