转帖-可视化网络电表搭建攻略（基于arduino+w5100）

laoliu1982 · 发表于 2013-9-1 09:24:26

原文地址：http://www.geek-workshop.com/thread-5649-1-1.html

×友情提示，修改电路前，一定要断开电源总开关×

你想象过看着家里的电器用电的样子吗？
你知道你每月那几天交的钱都去了哪里了吗？
你知道是什么东东在偷偷的用你的电吗？

如果你感兴趣，下面的文章适合你。

电，对于很多人来说是个很神秘，很危险，很神奇的东西。现在通过下面的攻略，你也可以拥有这样神奇的超能力，看到家里的电跑到哪里去了，是不是很想要？

====小广告====
你需要：
一个测电笔
一个十字口螺丝刀
一个平口螺丝刀
一把尖嘴钳
一个电量测量模块
一个通讯底板（我用的乐联网的E-KIT），你也可以使用任何一种arduino+w5100模块来搭建

====广告结束===

先看看效果图（据说近期会有新版的展示界面）
在线链接：
http://www.lewei50.com/home/gatewaystatus/1298

看到下面的锯齿状图形了吗？那就是你的冰箱在努力保持西瓜的新鲜。
几个用电高峰，是空调们在为主人降温。
用电量怎么总是高于0呢？那是你的无线路由器在保持家里的网络时刻畅通。

现在分步骤来实现它：
1断电
要断开家里空气开关的总闸，如果有室外的总闸，那就拉室外的总闸，保证家里是没有电的。
操作时严禁一只手碰火线，一只手碰零线。

2接线
打开家里的配电箱，找到总的进户的火线，拆开，把电量测量模块的圈圈套在这个火线上，专业术语是“互感器”。并把火线按照原来的位置接回去。

按照接线说明图，连接好测量模块、通讯模块和arduino。
3通电
如果你的操作正确，这时候推上你家的空气开关总闸，是不会有任何反应的。如果有问题，会跳闸。
4注册网站及设置对应传感器
http://www.lewei50.com/
注册及配置传感器过程不详细说明了。简单说下我的传感器的命名，你也可以有你自己的。

5刷代码
刷代码是为了从通讯模块里面把电量等数据读出来，并上传到乐联网上。

代码中使用了乐联网的类库，从这里下载：
http://www.github.com/lewei50/LeWeiClient/

实现代码：

// LeWei AC Power Meter trail success2013.06.25
// LeWei AC Power Meter (ZongBiao60A)trail syccess 2013.06.30 18:50pm
// 4 Parameter: watt / kwh / Amp / Voltage / Pf
/* FIXME: not yet being used */
unsigned long interframe_delay = 2; /* Modbus t3.5 = 2 ms */
/*
* preset_multiple_registers: Modbus function 16. Write the data from an
* array into the holding registers of a slave.
* INPUTS
* slave: modbus slave id number
* start_addr: address of the slave's first register (+1)
* reg_count: number of consecutive registers to preset
* data: array of words (ints) with the data to write into the slave
* RETURNS: the number of bytes received as response on success, or
* 0 if no bytes received (i.e. response timeout)
* -1 to -4 (modbus exception code)
* -5 for other errors (port error, etc.).
*/
int preset_multiple_registers(int slave, int start_addr,
int reg_count, int *data);
/*
* read_holding_registers: Modbus function 3. Read the holding registers
* in a slave and put the data into an array
* INPUTS
* slave: modbus slave id number
* start_addr: address of the slave's first register (+1)
* count: number of consecutive registers to read
* dest: array of words (ints) on which the read data is to be stored
* dest_size: size of the array, which should be at least 'count'
* RETURNS: the number of bytes received as response on success, or
* 0 if no valid response received (i.e. response timeout, bad crc)
* -1 to -4 (modbus exception code)
* -5 for other errors (port error, etc.).
*/
int read_holding_registers(int slave, int start_addr, int count,
int *dest, int dest_size);
/*
open.lewei50.com sensor client
*/
#include
#include
#include
#define USERKEY "Your API Key" // replace your key here
#define LW_GATEWAY "Your Gateway No."
LeWeiClient *lwc;
unsigned long lastConnectionTime = 0; // last time you connected to the server, in milliseconds
boolean lastConnected = false; // state of the connection last time through the main loop
const unsigned long postingInterval = 30*1000; //delay between updates to cosm.com
int pin = 8;
unsigned long duration;
unsigned long starttime;
unsigned long sampletime_ms = 30000;
unsigned long lowpulseoccupancy = 0;
float ratio = 0;
double concentration = 0;
void setup() {
// start serial port:
Serial.begin(4800);
pinMode(8,INPUT);
delay(10000);
lwc = new LeWeiClient(USERKEY, LW_GATEWAY);
starttime = millis();
}
/* filter program : 20130521 */
#define FILTERLEN 10
unsigned long Array_Average( unsigned long* Array,int length)
{
int x;
unsigned long returnVal;
unsigned long result=0;
for(x=0;xsindex)
{
sindex++;
Serial.println(sindex);
sfiterArray[sindex]=lowpulse;
Serial.println("filter1 END");
return lowpulse;
}
else
{
for(x=0;xappend("w", Watt);
lwc->append("a", Amp);
lwc->append("v", Voltage);
lwc->append("pf", Pf);
// lwc->append("06", Cabon);
lwc->send();
delay(15000);
}
// this method makes a HTTP connection to the server:
/****************************************************************************
* BEGIN MODBUS RTU MASTER FUNCTIONS
****************************************************************************/
//#define TIMEOUT 1000 /* 1 second */
#define TIMEOUT 10000 /* 10 second */
#define MAX_READ_REGS 125
#define MAX_WRITE_REGS 125
#define MAX_RESPONSE_LENGTH 256
#define PRESET_QUERY_SIZE 256
/* errors */
#define PORT_ERROR -5
/*
CRC
INPUTS:
buf -> Array containing message to be sent to controller.
start -> Start of loop in crc counter, usually 0.
cnt -> Amount of bytes in message being sent to controller/
OUTPUTS:
temp -> Returns crc byte for message.
COMMENTS:
This routine calculates the crc high and low byte of a message.
Note that this crc is only used for Modbus, not Modbus+ etc.
****************************************************************************/
unsigned int crc(unsigned char *buf, int start, int cnt)
{
int i, j;
unsigned temp, temp2, flag;
temp = 0xFFFF;
for (i = start; i < cnt; i++) {
temp = temp ^ buf[i];
for (j = 1; j <= 8; j++) {
flag = temp & 0x0001;
temp = temp >> 1;
if (flag)
temp = temp ^ 0xA001;
}
}
/* Reverse byte order. */
temp2 = temp >> 8;
temp = (temp << 8) | temp2;
temp &= 0xFFFF;
return (temp);
}
/***********************************************************************
*
* The following functions construct the required query into
* a modbus query packet.
*
***********************************************************************/
#define REQUEST_QUERY_SIZE 6 /* the following packets require */
#define CHECKSUM_SIZE 2 /* 6 unsigned chars for the packet plus */
/* 2 for the checksum. */
void build_request_packet(int slave, int function, int start_addr,
int count, unsigned char *packet)
{
packet[0] = slave;
packet[1] = function;
start_addr -= 1;
packet[2] = start_addr >> 8;
packet[3] = start_addr & 0x00ff;
packet[4] = count >> 8;
packet[5] = count & 0x00ff;
//below test only
// packet[0] =0x01;
// packet[1] = 0x03;
// packet[2] = 0;
// packet[3] = 0x48;
// packet[4] = 0;
// packet[5] = 0x02;
}
/*************************************************************************
*
* modbus_query( packet, length)
*
* Function to add a checksum to the end of a packet.
* Please note that the packet array must be at least 2 fields longer than
* string_length.
**************************************************************************/
void modbus_query(unsigned char *packet, size_t string_length)
{
int temp_crc;
temp_crc = crc(packet, 0, string_length);
packet[string_length++] = temp_crc >> 8;
packet[string_length++] = temp_crc & 0x00FF;
packet[string_length] = 0;
}
/***********************************************************************
*
* send_query(query_string, query_length )
*
* Function to send a query out to a modbus slave.
************************************************************************/
int send_query(unsigned char *query, size_t string_length)
{
int i;
modbus_query(query, string_length);
string_length += 2;
for (i = 0; i < string_length; i++) {
// Serial.print(query[i], HEX); //Orginal
Serial.write(query[i]); //JingLi
}
/* without the following delay, the reading of the response might be wrong
* apparently, */
delay(200); /* FIXME: value to use? */
return i; /* it does not mean that the write was succesful, though */
}
/***********************************************************************
*
* receive_response( array_for_data )
*
* Function to monitor for the reply from the modbus slave.
* This function blocks for timeout seconds if there is no reply.
*
* Returns: Total number of characters received.
***********************************************************************/
int receive_response(unsigned char *received_string)
{
int bytes_received = 0;
int i = 0;
/* wait for a response; this will block! */
while(Serial.available() == 0) {
delay(1);
if (i++ > TIMEOUT)
return bytes_received;
}
delay(200);
/* FIXME: does Serial.available wait 1.5T or 3.5T before exiting the loop? */
while(Serial.available()) {
received_string[bytes_received] = Serial.read();
// Serial.print(bytes_received); //only test
// Serial.print("-"); //only test
// Serial.println(received_string[bytes_received]); //only test
bytes_received++;
if (bytes_received >= MAX_RESPONSE_LENGTH)
return PORT_ERROR;
}
//Serial.print("bytes_received=");
//Serial.println(bytes_received);
return (bytes_received);
}
/*********************************************************************
*
* modbus_response( response_data_array, query_array )
*
* Function to the correct response is returned and that the checksum
* is correct.
*
* Returns: string_length if OK
* 0 if failed
* Less than 0 for exception errors
*
* Note: All functions used for sending or receiving data via
* modbus return these return values.
*
**********************************************************************/
int modbus_response(unsigned char *data, unsigned char *query)
{
int response_length;
int i;
unsigned int crc_calc = 0;
unsigned int crc_received = 0;
unsigned char recv_crc_hi;
unsigned char recv_crc_lo;
do { // repeat if unexpected slave replied
response_length = receive_response(data);
}
while ((response_length > 0) && (data[0] != query[0]));
// for (i = 0; i 0)
raw_response_length -= 2;
if (raw_response_length > 0) {
/* FIXME: data[2] * 2 ???!!! data[2] isn't already the byte count (number of registers * 2)?! */
for (i = 0;
i < (data[2] * 2) && i < (raw_response_length / 2);
i++) {
/* shift reg hi_byte to temp */
temp = data[3 + i * 2] << 8;
/* OR with lo_byte */
temp = temp | data[4 + i * 2];
dest[i] = temp;
}
}
return (raw_response_length);
}
/***********************************************************************
*
* preset_response
*
* Gets the raw data from the input stream.
*
***********************************************************************/
int preset_response(unsigned char *query)
{
unsigned char data[MAX_RESPONSE_LENGTH];
int raw_response_length;
raw_response_length = modbus_response(data, query);
return (raw_response_length);
}
/************************************************************************
*
* read_holding_registers
*
* Read the holding registers in a slave and put the data into
* an array.
*
*************************************************************************/
int read_holding_registers(int slave, int start_addr, int count,
int *dest, int dest_size)
{
int function = 0x03; /* Function: Read Holding Registers */
int ret;
unsigned char packet[REQUEST_QUERY_SIZE + CHECKSUM_SIZE];
if (count > MAX_READ_REGS) {
count = MAX_READ_REGS;
}
build_request_packet(slave, function, start_addr, count, packet);
if (send_query(packet, REQUEST_QUERY_SIZE) > -1) {
ret = read_reg_response(dest, dest_size, packet);
}
else {
ret = -1;
}
return (ret);
}
/************************************************************************
*
* preset_multiple_registers
*
* Write the data from an array into the holding registers of a
* slave.
*
*************************************************************************/
int preset_multiple_registers(int slave, int start_addr,
int reg_count, int *data)
{
int function = 0x10; /* Function 16: Write Multiple Registers */
int byte_count, i, packet_size = 6;
int ret;
unsigned char packet[PRESET_QUERY_SIZE];
if (reg_count > MAX_WRITE_REGS) {
reg_count = MAX_WRITE_REGS;
}
build_request_packet(slave, function, start_addr, reg_count, packet);
byte_count = reg_count * 2;
packet[6] = (unsigned char)byte_count;
for (i = 0; i < reg_count; i++) {
packet_size++;
packet[packet_size] = data[i] >> 8;
packet_size++;
packet[packet_size] = data[i] & 0x00FF;
}
packet_size++;
if (send_query(packet, packet_size) > -1) {
ret = preset_response(packet);
}
else {
ret = -1;
}
return (ret);
}

复制代码

6将电量可视化、数字化之后，你可以做很多的事情，自己琢磨吧～

Enjoy it~

binaimei2007 · 发表于 2013-9-1 09:57:06

挺好的，支持

liuzhen526 · 发表于 2013-11-26 09:58:43

mark 网络电表

转帖-可视化网络电表搭建攻略（基于arduino+w5100）

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