ESP8266 Community Forum

- Fri Nov 20, 2020 1:57 am #89516 I have been using the msp430 module to connect with esp8266 module. The device driver snippet of the code is attached below. I have successfully set the baud rate and the other UART settings in the master Controller(MSP430). As a result, the device is successfully connected to the AP using AT+CWJAP. I try to use http GET request to post the data to the server. But, due to some reasons, I cannot get the data on the server.

unsigned char sendstring[20] = "AT\r\n";
unsigned char sendstring1[40] = "AT+CWJAP=\"xxxxx\",\"xxxxxxx\"\r\n";
unsigned char sendstring2[60] = "AT+CIPSTART=\"TCP\",\"xxx.xxx.xxx.xxx\",xxxx\r\n";
unsigned char sendstring3[30] = "AT+CIPSEND=500\r\n";
unsigned char sendstring4[265] = "GET http://xxx.xxx.xxx.xxx:xxxx/xxxxxx/xxxx ... &remarks=1\r\nHTTP/1.1\r\nHost: xxx.xxx.xxx.xxx:xxxx\r\nConnection: close\r\nCache-Control: private, max-age=0\r\nContent-Type: text/html;charset=utf-8\r\n";


//string 2 send
__delay_cycles(2500000);
for(j=0;j<sizeof(sendstring2);j++)
{
while (!(UCA1IFG & UCTXIFG));
UCA1TXBUF = sendstring2[j];
if (sendstring2[j] == '\n')
break;
}

for (j=0; j<sizeof(receivestring2); ++j)
{
while (!(UCA1IFG & UCRXIFG)); // Spin until something arrives
receivestring2[j] = UCA1RXBUF;
if (receivestring2[j] == '\r')
break; // quit if we see carriage return
}
receivestring[j] = '\0';
__delay_cycles(2000000);

//string 3 send
for(j=0;j<sizeof(sendstring3);j++)
{
while (!(UCA1IFG & UCTXIFG));
UCA1TXBUF = sendstring3[j];
if (sendstring3[j] == '\n')
break;
}

for (j=0; j<sizeof(receivestring3); ++j)
{
while (!(UCA1IFG & UCRXIFG)); // Spin until something arrives
receivestring3[j] = UCA1RXBUF;
if (receivestring3[j] == '\r')
break; // quit if we see carriage return
}
receivestring3[j] = '\0';
__delay_cycles(1500000);

//string 4 send
for(j=0;j<sizeof(sendstring4);j++)
{
while (!(UCA1IFG & UCTXIFG));
UCA1TXBUF = sendstring4[j];
//if (sendstring4[j] == '\n')
//break;
}

for (j=0; j<sizeof(receivestring4); ++j)
{
while (!(UCA1IFG & UCRXIFG)); // Spin until something arrives
receivestring4[j] = UCA1RXBUF;
if (receivestring4[j] == '\r')
break; // quit if we see carriage return
}
receivestring4[j] = '\0';

Here, __delay_cycles(1000000); equals delay of 1s. I feel the problems exists in the sendstring3 and sendstring4. The receivestring4 contains only the url and the port of the server. Could you guys help me to solve this problem

- Wed Nov 25, 2020 3:50 am #89557 In the receivestring3, i get output as 'busy p' , 'WIFI CONNECTED', and 'WIFI GOT IP'.

- Fri Nov 27, 2020 10:42 am #89590 Not quite an "advanced" topic. Moved it.