基于gprs的溫度實(shí)時(shí)監(jiān)測(cè)系統(tǒng)設(shè)計(jì)畢業(yè)設(shè)計(jì)-閱讀頁(yè)
2025-07-07 01:03本頁(yè)面
【正文】 92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}。unsigned char code table1[]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10}。void delay1(uint count) //delay{ uint i。 while(i0) i。 }}void delay_18B20(unsigned int i){while(i)。DQ = 1。 //稍做延時(shí)DQ = 0。 //精確延時(shí)大于 480usDQ = 1。x=DQ。} unsigned char ReadOneChar(void){uchar i=0。for (i=8。i){ DQ = 0。 DQ = 1。 delay_18B20(40)。}void WriteOneChar(uchar dat){ unsigned char i=0。 i0。 DQ = datamp。 delay_18B20(50)。 dat=1。unsigned char b=0。Init_DS18B20()。 WriteOneChar(0x44)。 Init_DS18B20()。 WriteOneChar(0xBE)。a=ReadOneChar()。 //讀取溫度值高位temp_value = b8。tt=temp_value*。temp_value=tt。}void display(uint temp) //顯示程序{ uchar A1,A2,A2t,A3,ser。 //分離出三位要顯示的數(shù)字 SBUF=ser。A2t=temp%100。 A3=A2t%10。 P0=table[A1]。 dula=0。 P0=0x20。 wela=0。 dula=0。 //顯示十位帶小數(shù)點(diǎn)的dula=1。 wela=0。 wela=1。 delay1(1)。 //顯示個(gè)位 dula=1。 P0=0x80。 wela=0。}static void delay ( unsigned char t ){ unsigned char i = 0,j = 0。 it。 j }}/********************************************************************長(zhǎng)延時(shí)函數(shù)*********************************************************************/static void delay1S ( unsigned int z ){ unsigned int x = 0。x z。 }}void LED_ON(unsigned int n){ switch(n){ case 1: LED1 = 0。 case 2: LED2 = 0。 case 3: LED3 = 0。 case 4: LED4 = 0。 default: break。 break。 break。 break。 break。 }}unsigned char get_key(){ unsigned char tmp = 0。 tmp = P1。 0xC0。 } if(tmp == 0x40){ res = 2。 } return res。= ~0x40。= ~0x40。 //delay1S(20)。 delay1S(100)。 delay1S(300)。 //P1M0 amp。}void board_init(void){ P1 = 0x0。 P3 = 0x0。}unsigned char start_str[] = Temperature Monitoring System。unsigned char user_tel[] = 15319382834。sfr WAKE_CLKO = 0X8F。sbit ELVD = IE^6。 for( i=0。 i++) for( j=0。 j++)。 for (x = 0。x++ ){ for (j = 0。j++) { delay(10)。 temperature[1] = dat%100/10 + 0x30。 temperature[3] = 39。}void init(){ Uart0_Init()。 sim900a_start()。 uint tmpt。 Uart0_PutString(start_str,strlen(start_str))。 //delay_long_1S(10)。 while(1){ tmpt = ReadTemp()。a0。 //顯示十次 } int2asc(tmpt)。 //sim900a_send_message(temperature,strlen(temperature),user_tel)。 GPRS_TCP_LINK()。 GPRS_TCP_SEND_DATA(temperature,strlen(temperature))。 GPRS_TCP_SEND_DATA(temperature,strlen(temperature))。 GPRS_TCP_SEND_DATA(temperature,strlen(temperature))。 GPRS_TCP_SEND_DATA(temperature,strlen(temperature))。 GPRS_TCP_SEND_DATA(temperature,strlen(temperature))。 endif //delay_long_1S(2)。 }}附錄B:溫度采集仿真附錄C外文翻譯Single ConnectionCommand AT+CIPMUX=n is used for selecting TCPIP connection mode, when n=0, it is single connection。 when n=1, it is transparent mode. The default configuration is nontransparent mode. There are three working modes for SIM900 under this mode: TCP client, UDP client and TCP server. How to Establish a TCP Client Connection Firstly, before any TCP/UDP related operation is set up, the module should be connected to GSM or GPRS network. User can use the mands “AT+CREG?” and “AT+CGATT?” to query the GSM network registration status whether the module has been attached to GPRS service. AT+CPIN? +CPIN: READYOK AT+CSQ CSQ: 20,0 OK AT+CREG? +CREG: 0,1 OK AT+CGATT? +CGATT: 1 OK Secondly, user should use the mand group AT+CSTT, AT+CIICR and AT+CIFSR to start the task and activate the wireless connection. Lastly, user can establish TCP connection between SIM900 and the server by AT mand (AT+CIPSTART=”TCP”,”IP Address of server”, “port number of server”). If the connection is established successfully, response “CONNECT OK” will e up from the module. Now user can send data to the server with “AT+CIPSEND”. “AT+CIPSEND” will return promoting mark “”, user should write data after “” then issue CTRL+Z (0x1a) to send. If sending is successful, it will respond “SEND OK”. And if there is data ing from the server, the module will receive the data automatically from the serial port. User can close the TCP connection with “AT+CIPCLOSE” mand. Below is an example of TCP connection to remote server.AT+CGATT? +CGATT: 1 OK AT+CSTT=”CMNET” // Start task and set APN. See Note [1].OK AT+CIICR // Bring up wireless connection (GPRS or CSD) OK AT+CIFSR // Get local IP address AT+CIPSTART=”TCP”,””, “8500” // Start up the connection OK CONNECT OK // The TCP connection has been established successfully.AT+CIPSEND hello TCP server //Send data to remote server, CTRL+Z (0x1a) to send. See Note[2] SEND OK // Remote server receives data.hello sim900 // Received data from remote server CLOSED // Remote server closed the connection Note [1]: The default APN is “CMNET”, with no username or password. Check with local GSM provider to get the APN. Note [2]: User should write data only after the promoting mark “” , and then use CTRL+Z to send. User can use mand “AT+CIPSPRT” to set whether echo promote “” after issuing“AT+CIPSEND”. How to Establish a UDP Client Connection The process of establishing UDP connection is similar to TCP. AT+CGATT? +CGATT: 1 OK AT+CSTT=”CMNET” OK AT+CIICR OK AT+CIFSR AT+CIPSTART=”UDP”,””,”9600” CONNECT OK AT+CIPSEND sim900 UDP testSEND OK // Data has been sent out from the serial port, but it is unknown if the data reaches the UDP server. See Note[3]. UDP test //Receive data from remote server AT+CIPCLOSE // Close the UDP connection CLOSE OK Note [3]: For TCP, “SEND OK” means data has been sent out and received successfully by the remote server, due to the TCP connectionoriented protocol
物理相關(guān)推薦
鄂ICP備17016276號(hào)-1