enc28j60网络应用问题求解

孤独舰

最近试验了enc28j60网络模块，上传单个数据是可以的，但隔断时间发5个数据串口显示会乱码？求高手指点。
代码如下：

#include <EtherCard.h>
static byte mymac[] = {0xe8,0x9a,0x8f,0xcf,0x8a,0xcf};
byte Ethernet::buffer[400];
char buf[50];
static long timer;
uint8_t lwCount=0;

float temp=0;


#define REQUEST_RATE 10000 // milliseconds

char website[] PROGMEM = "www.lewei50.com";
char urlBuf[] PROGMEM = "/api/V1/gateway/UpdateSensors/01";
char apiKey[] PROGMEM = "userkey:***********************";

char *lwSensor[5]={"T1", "T2", "T3", "T4", "T5"};

static void my_result_cb (byte status, word off, word len) {
  Serial.print("<<< reply ");
  Serial.print(millis() - timer);
  Serial.println(" ms");
  Serial.println((const char*) Ethernet::buffer + off);
}

void setup () {

  Serial.begin(9600);
  Serial.println("\n[Lewei50.com]");

  if (!ether.begin(sizeof Ethernet::buffer, mymac, 10))
    Serial.println( "Failed to access Ethernet controller");
else
   Serial.println("Ethernet controller initialized");

  if (!ether.dhcpSetup())
    Serial.println("Failed to get configuration from DHCP");
  else
    Serial.println("DHCP configuration done");

  ether.printIp("IP Address:\t", ether.myip);
  ether.printIp("Netmask:\t", ether.mymask); //子掩码
  ether.printIp("Gateway:\t", ether.gwip);//网关
  
    if (!ether.dnsLookup(website))
    Serial.println("DNS failed");
    else
  ether.printIp("Server: ", ether.hisip);
  
  timer = - REQUEST_RATE; // start timing out right away
}

void loop () {
  ether.packetLoop(ether.packetReceive());
   
  if (millis() > timer + REQUEST_RATE)
  {
    timer = millis();
     e_send();
  }
}

void e_send(void)
{
  
Serial.println("\n>>> send");
  
    temp=temp+0.2;
    if(temp>2000)
    temp=0;
   
  uint8_t  whole, fract;
  whole=(int)(temp*10.0)/10;
  fract = (int)(temp*10.0) % 10;
  
  sprintf(buf,"[{\"Name\":\"%s\",\"Value\":\"%d.%d\"}]",lwSensor[lwCount], whole,fract);
    Serial.println(buf);
    ether.dnsLookup(website);
    ether.printIp("Server: ", ether.hisip);
    ether.httpPost (urlBuf, website, apiKey, buf, my_result_cb);
   
         lwCount++;
  if(lwCount>5)
  lwCount=0;
   Serial.println(lwCount);
}

zoologist

乱码是什么样子的？截图看一下

孤独舰

lwcount第一次从0-4正常，再往下就不对了：



>>> send
[{"Name":"T5","Value":"1.0"}]
Server: 42.121.254.11
4
<<< reply 170 ms
HTTP/1.1 200 OK
Date: Thu, 16 Jan 2014 03:00:36 GMT
Content-Type: application/json; charset=utf-8
Content-Length: 44
Connection: close
Cache-Control: private
Set-Cookie: SERVERID=a4a5b2bbca16d8c8b2ba6d5b6e55f36e|1389841236|1389841236ath=/

{"Successful":true,"Message":"Successful. "}

>>> send
[{"Name":"ation/json; charset=utf-8
Content-Length: 44
Connection: close
Cache-Control: private
Set-Cookie: SERVERID=a4a5b2bbca16d8c8b2ba6d5b6e55f36e|1389841236|1389841236ath=ˉ

&#146;{"Sccessful":true,"Message":"Successful. "}","Value":"1.2"}]
Server: 0.0.0.0
104

红色是第二次串口输出 不对了。

孤独舰

网络上显示value是0.2  0.4  0.6  0.8  1.0  就不在显示了，求解呀？