esp01 发布数据但是云端没有收到

Question

目前我正在使用由 Arduino uno 提供支持的 esp01，我正在使用 MQTT 协议

我尝试使用 AT 命令将数据发布到 thingspeak 云，所以我开始连接到 Wi-Fi 并首先发送连接帧，esp 以“SEND OK”响应，然后我发送发布帧，它以“SEND”响应好的”，但数据没有到达云端。

我在 http 之前尝试过，一切正常，但我不确定哪里出了问题，这可能是供电问题吗？

有人可以帮我找到问题

void Wifi_init(void){
    //Set_Bit(SREG,SREG_I);
    Enable_RXInterrupt();
    UART_RX_SetCallBack(interrupt_func);
    data_ready=0;
    buff_lenght=0;
    memset(receive_buffer,0,300);                                                       //reset buffer ,but 0 to all buffer elements

    UART_SendString("AT+RST\r\n");                                                      //reset wifi module
    while (response_success("OK")!=OK);
    _delay_ms(100);
    UART_SendString("ATE0\r\n");                                                        //disable echo
    while (response_success("OK")!=OK);
    _delay_ms(100);
    UART_SendString("AT+CWMODE=3\r\n");                                                 //Wifi mode 1--station,2--AP,3--station+AP
    while (response_success("OK")!=OK);
    _delay_ms(100);
    UART_SendString("AT+CIPMUX=0\r\n");                                                 //single connection mode
    while (response_success("OK")!=OK);
    _delay_ms(100);
    UART_SendString("AT+CIPMODE=0\r\n");                                                //transfer mode 0--normal mode,1--wifi pass-through mode
    while (response_success("OK")!=OK);
    _delay_ms(100);
    UART_SendString("AT+CWJAP=\"VodafoneMobileWiFi-3ABC36\",\"6996086485\"\r\n");                           //connect to APs
    while (response_success("OK")!=OK);
    _delay_ms(100);
    UART_SendString("AT+CIPSTART=\"TCP\",\"mqtt3.thingspeak.com\",1883\r\n");           //connect to the raspberry pi
    while (response_success("OK")!=OK);
    _delay_ms(1000);
}
}

void CONNECT (void){
    uint8 remaining_length=16+23+23+24;
    UART_SendString("AT+CIPSEND=88\r\n");
    while (response_success("OK")!=OK);
    _delay_ms(100);
    UART_SendChar(0x10);                                                                //control field
    UART_SendChar(0x56);                //0x56                                              //remaining length
    UART_SendChar(0x00);                                                                //protocol name length
    UART_SendChar(0x04);
    UART_SendString("MQTT");
    UART_SendChar(0x04);                                                                //protocol level
    UART_SendChar(0xC2);                                                                //connect flag (means the payload doesn't have a user name or a password and sessions are cleared)
    UART_SendChar(0x00);                                                                //keep alive
    UART_SendChar(0x3C);
    UART_SendChar(0x00);                                                                // client id length
    UART_SendChar(0x17);
    UART_SendString("AQIJOwYtAzkqJSkQEQQ3Bxg");                                         //client id
    UART_SendChar(0x00);
    UART_SendChar(0x17);
    UART_SendString("AQIJOwYtAzkqJSkQEQQ3Bxg");
    UART_SendChar(0x00);
    UART_SendChar(0x18);
    UART_SendString("hSxegr0GjrvuxUHtzHmBeozg");
    while (response_success("SEND OK")!=OK);
    while (response_success("+IPD")!=OK);
}

void PUBLISH (uint8 * Topic,uint8 * data){
    uint8 topic_bytes = strlen(Topic);
    uint8 data_bytes = strlen(data);
    uint8 frame_string [3];
    uint8 send_command[20];

    uint8 topic_length =string_length_hex(Topic);
    uint8 data_length =string_length_hex(data);
    UART_SendString("AT+CIPSEND=44\r\n");                                                   //send the command
    while (response_success("OK")!=OK);
    _delay_ms(200);
    ///////CHECK THE RESPONSE
    UART_SendChar(0x30);                                                            //protocol name length
    UART_SendChar(0x2A);  //44
    UART_SendChar(0x00);
    UART_SendChar(0x26);
    UART_SendString((char *)Topic);
    UART_SendString((char *)data);
    while (response_success("SEND OK")!=OK);
        _delay_ms(200);
}

int main(){
    Set_Bit(SREG,SREG_I);
    Dio_init();
    USART_init();
    Wifi_init();
    CONNECT();
    while(1){
        PUBLISH("channels/1966346/publish/fields/field1","42");
        _delay_ms(2000);
    }
}

Answer 1

我记得我在使用 STM32 低层寄存器时遇到了同样的问题，我认为解决方案是使用

sprintf(buffer,"frame")

函数将我发送的数据放入缓冲区。

void PUBLISH(uint8_t* topic, uint8_t* data) {
uint8_t buffer[];
uint8_t topic_len = strlen(topic);
uint8_t data_len = strlen(data);

// MQTT message
sprintf(buffer, "AT+CIPSEND=%d\r\n", topic_len+data_len+1);
UART_SendString(buffer);
while (response_success("OK") != OK);

_delay_ms(200);

sprintf(buffer, "%c%c%s%s", 0x30, 0x02 + topic_len + data_len, topic, data);
UART_SendString(buffer);

while (response_success("SEND OK") != OK);
_delay_ms(200);
}

我认为您可能需要在发送时将长度添加 +1 或 +2

AT+CIPSEND=44+1\r\n