O_Air724UG_AT指令巴法云MQTT函数

电子硬件

O_嵌入式专题目录

单独指令函数（C - FreeRtos）

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uint8_t sendStep = 5;   //If connected IP before, start at step 5, do not have to initialize again, otherwise back to step 0
static uint8_t HttpGetLte(const char *urlGet)
{
    uint8_t *data = (uint8_t*) malloc(RX_BUF_SIZE+1);   //Save data from uart
    uint8_t successFlag = 0;
    uint8_t sleepTime = 0;  //Delay seconds in every step, can be shorter if uart speed if faster
    while(1)
    {
        if(sendStep == 0)
        {
            //Check 4G model
            while(1)
            {
                Uart2SendData("AT\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT\r\n\r\nOK\r\n"))    //Compare strings
                        sendStep = 1;
                    else
                        ESP_LOGI("HttpGetLte", "@0:%s", (char *)data);
                    break;
                }
            }
            if(sleepTime)   //Delay in every step, based on ms and multiply 1000, result is 'sleepTime' seconds
                vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
        }
        else if(sendStep == 1)
        {
            //Check SIM card
            while(1)
            {
                Uart2SendData("AT+CPIN?\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+CPIN?\r\n\r\n+CPIN: READY\r\n\r\nOK\r\n"))
                        sendStep = 2;
                    else
                        ESP_LOGI("HttpGetLte", "@1:%s", (char *)data);
                    break;
                }
            }
            if(sleepTime)
                vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
        }
        else if(sendStep == 2)
        {
            //Check regist
            while(1)
            {
                Uart2SendData("AT+CGATT?\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+CGATT?\r\n\r\n+CGATT: 1\r\n\r\nOK\r\n"))
                        sendStep = 3;
                    else
                        ESP_LOGI("HttpGetLte", "@2:%s", (char *)data);
                    break;
                }
            }
            if(sleepTime)
                vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
        }
        else if(sendStep == 3)
        {
            //Set APN
            while(1)
            {
                Uart2SendData("AT+CSTT\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+CSTT\r\n\r\nOK\r\n"))
                        sendStep = 4;
                    else if(strstr((char *)data, "AT+CSTT\r\n\r\n") && strstr((char *)data, "+CME ERROR"))
                        sendStep = 5;
                    else
                        ESP_LOGI("HttpGetLte", "@3:%s", (char *)data);
                    break;
                }
            }
            if(sleepTime)
                vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
        }
        else if(sendStep == 4)
        {
            //Active network
            while(1)
            {
                Uart2SendData("AT+CIICR\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+CIICR\r\n\r\nOK\r\n"))
                        sendStep = 5;
                    else if(strstr((char *)data, "AT+CIICR\r\n\r\n") && strstr((char *)data, "+CME ERROR"))
                        sendStep = 0;
                    else
                        ESP_LOGI("HttpGetLte", "@4:%s", (char *)data);
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else if(sendStep == 5)
        {
            //Check ip
            while(1)
            {
                Uart2SendData("AT+CIFSR\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+CIFSR\r\n\r\n") && !strstr((char *)data, "+CME ERROR"))
                        sendStep = 6;
                    else if(strstr((char *)data, "AT+CIFSR\r\n\r\n") && strstr((char *)data, "+CME ERROR"))
                    {
                        while(1)
                        {
                            Uart2SendData("AT+CIPSHUT\r\n");
                            const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                            if(rxBytes > 0)
                            {
                                data[rxBytes] = 0;
                                if(strstr((char *)data, "AT+CIPSHUT\r\n\r\nSHUT OK\r\n"))
                                    sendStep = 3;
                                else
                                    ESP_LOGI("HttpGetLte", "@5-1:%s", (char *)data);
                                break;
                            }
                        }
                    }
                    else
                        ESP_LOGI("HttpGetLte", "@5-2:%s", (char *)data);
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else if(sendStep == 6)
        {
            while(1)
            {
                Uart2SendData("AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\"\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+SAPBR=3,1,\"CONTYPE\",\"GPRS\"\r\n\r\nOK\r\n"))
                        sendStep = 7;
                    else
                        ESP_LOGI("HttpGetLte", "@6:%s", (char *)data);
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else if(sendStep == 7)
        {
            while(1)
            {
                Uart2SendData("AT+SAPBR=3,1,\"APN\",\"\"\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+SAPBR=3,1,\"APN\",\"\"\r\n\r\nOK\r\n"))
                        sendStep = 8;
                    else
                        ESP_LOGI("HttpGetLte", "@7:%s", (char *)data);
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else if(sendStep == 8)
        {
            while(1)
            {
                Uart2SendData("AT+SAPBR=1,1\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+SAPBR=1,1\r\n\r\nOK\r\n"))
                        sendStep = 9;
                    else if(strstr((char *)data, "AT+SAPBR=1,1\r\n\r\n") && strstr((char *)data, "+CME ERROR"))
                        sendStep = 9;
                    else
                        ESP_LOGI("HttpGetLte", "@8:%s", (char *)data);
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else if(sendStep == 9)
        {
            while(1)
            {
                Uart2SendData("AT+SAPBR=2,1\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+SAPBR=2,1\r\n\r\n") && strstr((char *)data, "+SAPBR: 1,1,"))
                        sendStep = 10;
                    else if(strstr((char *)data, "AT+SAPBR=2,1\r\n\r\n") && !strstr((char *)data, "+SAPBR: 1,1,"))
                        sendStep = 8;
                    else
                        ESP_LOGI("HttpGetLte", "@9:%s", (char *)data);
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else if(sendStep == 10)
        {
            //Init http
            while(1)
            {
                Uart2SendData("AT+HTTPINIT\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+HTTPINIT\r\n\r\nOK\r\n"))
                        sendStep = 11;
                    else if(strstr((char *)data, "AT+HTTPINIT\r\n\r\n") && strstr((char *)data, "+CME ERROR: 3"))
                        sendStep = 11;
                    else
                        ESP_LOGI("HttpGetLte", "@10:%s", (char *)data);
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else if(sendStep == 11)
        {
            //Set http CID
            while(1)
            {
                Uart2SendData("AT+HTTPPARA=\"CID\",1\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+HTTPPARA=\"CID\",1\r\n\r\nOK\r\n"))
                        sendStep = 12;
                    else
                        ESP_LOGI("HttpGetLte", "@11:%s", (char *)data);
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else if(sendStep == 12)
        {
            //Set url
            char *sendUrlTempStr = (char *) malloc(MAX_HTTP_OUTPUT_BUFFER);
            sprintf(sendUrlTempStr, "AT+HTTPPARA=\"URL\",\"%s\"\r\n", urlGet);
            while(1)
            {
                Uart2SendData(sendUrlTempStr);
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+HTTPPARA=\"URL\",") && strstr((char *)data, "OK\r\n"))
                        sendStep = 13;
                    else
                        ESP_LOGI("HttpGetLte", "@12:%s", (char *)data);
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else if(sendStep == 13)
        {
            //Send http
            while(1)
            {
                Uart2SendData("AT+HTTPACTION=1\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    //if(strstr((char *)data, "AT+HTTPACTION=1\r\n\r\nOK\r\n"))
                        //sendStep = 14;
                        //break;
                    if(strstr((char *)data, "+HTTPACTION: 1,200,"))
                    {
                        sendStep = 14;
                        // break;
                    }
                    else
                        ESP_LOGI("HttpGetLte", "@13:%s", (char *)data);
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else if(sendStep == 14)
        {
            //Get response
            while(1)
            {
                Uart2SendData("AT+HTTPREAD\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+HTTPREAD\r\n\r\n+HTTPREAD:"))
                    {
                        successFlag = 1;
                        strcpy(output_buffer, (char *)data);
                        ESP_LOGI("HttpGetLte", "%s", output_buffer);
                        sendStep = 15;
                    }
                    else
                        ESP_LOGI("HttpGetLte", "@14:%s", (char *)data);
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else if(sendStep == 15)
        {
            //Terminate http
            while(1)
            {
                Uart2SendData("AT+HTTPTERM\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+HTTPTERM\r\n\r\nOK\r\n"))
                        sendStep = 16;
                    else if(strstr((char *)data, "AT+HTTPTERM\r\n\r\n") && strstr((char *)data, "+CME ERROR: 3"))
                        sendStep = 16;
                    else
                        ESP_LOGI("HttpGetLte", "@15:%s", (char *)data);
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else if(sendStep == 16)
        {
            //Shutdown network
            while(1)
            {
                Uart2SendData("AT+CIPSHUT\r\n");
                const int rxBytes = uart_read_bytes(UART_NUM_2, data, RX_BUF_SIZE, 100 / portTICK_RATE_MS);;
                if(rxBytes > 0)
                {
                    data[rxBytes] = 0;
                    if(strstr((char *)data, "AT+CIPSHUT\r\n\r\nSHUT OK\r\n"))
                        sendStep = 20;
                    else if(strstr((char *)data, "AT+CIPSHUT\r\n\r\n") && strstr((char *)data, "+CME ERROR: 3"))
                        sendStep = 20;
                    else
                    {
                        //sendStep = 20;
                        ESP_LOGI("HttpGetLte", "@16:%s", (char *)data);
                    }
                    break;
                }
                if(sleepTime)
                    vTaskDelay(sleepTime*1000 / portTICK_PERIOD_MS);
            }
        }
        else
        {
            if(successFlag)
            {
                sendStep = 5;
                return 1;
            }
            else
            {
                //sendStep = 17;
                return 0;
            }
            //vTaskDelay(1000 / portTICK_PERIOD_MS);
        }
        ESP_LOGI("HttpGetLteStep", "%d", sendStep);
    }
    free(data); //清空数据缓冲区
    return 0;
}

图传+指令函数（MicroPython）

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sendStep = 5
def Uart4GSendImg(sendImg, url):    #If need to send Img, set 'sendImg' = 1
    global sendStep, ipAddress
    imgUrlJson = ""
    responseJson = ""
    sleepTime = 0
    while 1:
        if sendStep == 0:
            #Check 4G model
            uart4G.write('AT\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT\r\n\r\nOK\r\n' in readData4G:
                    sendStep = 1
                    break
                if readData4G != None:
                    print("@0:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 1:
            #Check SIM card
            uart4G.write('AT+CPIN?\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+CPIN?\r\n\r\n+CPIN: READY\r\n\r\nOK\r\n' in readData4G:
                    sendStep = 2
                    break
                if readData4G != None:
                    print("@1:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 2:
            #Check regist
            uart4G.write('AT+CGATT?\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+CGATT?\r\n\r\n+CGATT: 1\r\n\r\nOK\r\n' in readData4G:
                    sendStep = 3
                    break
                if readData4G != None:
                    print("@2:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 3:
            #Set APN
            uart4G.write('AT+CSTT\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+CSTT\r\n\r\nOK\r\n' in readData4G:
                    sendStep = 4
                    break
                elif readData4G != None and 'AT+CSTT\r\n\r\n' in readData4G and '+CME ERROR' in readData4G:
                    sendStep = 5
                    break
                if readData4G != None:
                    print("@3:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 4:
            #Active network
            uart4G.write('AT+CIICR\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+CIICR\r\n\r\nOK\r\n' in readData4G:
                    sendStep = 5
                    break
                elif readData4G != None and 'AT+CIICR\r\n\r\n' in readData4G and '+CME ERROR' in readData4G:
                    sendStep = 0
                    break
                if readData4G != None:
                    print("@4:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 5:
            #Check ip
            uart4G.write('AT+CIFSR\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+CIFSR\r\n\r\n' in readData4G and not ('+CME ERROR' in readData4G):
                    ipAddress = readData4G[12:-2]
                    sendStep = 6
                    break
                elif readData4G != None and 'AT+CIFSR\r\n\r\n' in readData4G and '+CME ERROR' in readData4G:
                    uart4G.write('AT+CIPSHUT\r\n')
                    while 1:
                        readData4G = uart4G.read()
                        if readData4G != None and 'AT+CIPSHUT\r\n\r\nSHUT OK\r\n' in readData4G:
                            sendStep = 3
                            break
                        if readData4G != None:
                            print("@5:", readData4G)
                            break
                if readData4G != None:
                    print("@5:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 6:
            uart4G.write('AT+SAPBR=3,1,"CONTYPE","GPRS"\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+SAPBR=3,1,"CONTYPE","GPRS"\r\n\r\nOK\r\n' in readData4G:
                    sendStep = 7
                    break
                if readData4G != None:
                    print("@6:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 7:
            uart4G.write('AT+SAPBR=3,1,"APN",""\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+SAPBR=3,1,"APN",""\r\n\r\nOK\r\n' in readData4G:
                    sendStep = 8
                    break
                if readData4G != None:
                    print("@7:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 8:
            uart4G.write('AT+SAPBR=1,1\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+SAPBR=1,1\r\n\r\nOK\r\n' in readData4G:
                    sendStep = 9
                    break
                elif readData4G != None and 'AT+SAPBR=1,1\r\n\r\n' in readData4G and '+CME ERROR' in readData4G:
                    sendStep = 9
                    break
                if readData4G != None:
                    print("@8:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 9:
            uart4G.write('AT+SAPBR=2,1\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+SAPBR=2,1\r\n\r\n' in readData4G and '+SAPBR: 1,1,' in readData4G:
                    sendStep = 10
                    break
                elif readData4G != None and 'AT+SAPBR=2,1\r\n\r\n' in readData4G and not ('+SAPBR: 1,1,' in readData4G):
                    sendStep = 8
                    break
                if readData4G != None:
                    print("@9:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 10:
            #Init http
            uart4G.write('AT+HTTPINIT\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+HTTPINIT\r\n\r\nOK\r\n' in readData4G:
                    sendStep = 11
                    break
                elif readData4G != None and 'AT+HTTPINIT\r\n\r\n' in readData4G and '+CME ERROR: 3' in readData4G:
                    sendStep = 11
                    break
                if readData4G != None:
                    print("@10:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 11:
            #Set http CID
            uart4G.write('AT+HTTPPARA="CID",1\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+HTTPPARA="CID",1\r\n\r\nOK\r\n' in readData4G:
                    sendStep = 12
                    break
                if readData4G != None:
                    print("@11:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 12:
            #Set http url
            if sendImg == 1:    #If need to send Img
                uart4G.write('AT+HTTPPARA="URL","http://images.bemfa.com/upload/v1/upimages.php"\r\n')
                while 1:
                    readData4G = uart4G.read()
                    if readData4G != None and 'AT+HTTPPARA="URL",' in readData4G and 'OK\r\n' in readData4G:
                        sendStep = 13
                        break
                    if readData4G != None:
                        print("@12:", readData4G)
                        break
            else:
                sendStep = 19
            time.sleep(sleepTime)
        elif sendStep == 13:
            #Set http user header
            uart4G.write('AT+HTTPPARA="USERDATA","User-Agent:MaixPy\\r\\nAuthorization:7d54f85af42976ee3c2693e6xxxxxxxx\\r\\nAuthtopic:K210IMG"\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+HTTPPARA="USERDATA",' in readData4G and 'OK\r\n' in readData4G:
                    sendStep = 15
                    break
                if readData4G != None:
                    print("@13:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 14:
            uart4G.write('AT+HTTPPARA?\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None:
                    print("@14:", readData4G)
                    sendStep = 15
                    break
                else:
                    break
            time.sleep(sleepTime)
        elif sendStep == 15:
            #Send file/image
            img = image.Image("/flash/oPic.jpg")
            img = img.compress(quality=60)
            imgBytes = img.to_bytes()
            #uart4G.write('AT+HTTPDATA=1024,100000\r\n')
            print('AT+HTTPDATA=%d,10000\r\n' % img.size())
            uart4G.write('AT+HTTPDATA=%d,10000\r\n' % img.size())
            time.sleep(1)
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'DOWNLOAD' in readData4G:
                    if imgBytes:
                        print("Write ...")
                        uart4G.write(img)
                        print('Write', len(imgBytes))
                        while 1:
                            readData4G = uart4G.read()
                            if readData4G != None and '\r\nOK\r\n' in readData4G:
                                sendStep = 16
                                break
                            if readData4G != None:
                                print("@15:", readData4G)
                                break
                            #elif readData4G == None:
                                #print("Add")
                                #uart4G.write('\r\n')
                break
            time.sleep(sleepTime)
        elif sendStep == 16:
            #Send http
            uart4G.write('AT+HTTPACTION=1\r\n')
            while 1:
                readData4G = uart4G.read()
                #if readData4G != None and 'AT+HTTPACTION=1\r\n\r\nOK\r\n' in readData4G:
                    #sendStep = 17
                    #break
                if readData4G != None and '+HTTPACTION: 1,200,' in readData4G:
                    sendStep = 17
                    break
                if readData4G != None:
                    print("@16:", readData4G)
                    #break
            time.sleep(sleepTime)
        elif sendStep == 17:
            #Get response
            uart4G.write('AT+HTTPREAD\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+HTTPREAD\r\n\r\n+HTTPREAD:' in readData4G:
                    if sendImg:
                        imgUrlJson = readData4G[readData4G.index(b"\r\n{")+2:readData4G.index(b"}\r\n")+1]
                        responseJson = None
                    else:
                        responseJson = readData4G[readData4G.index(b"\r\n{")+2:readData4G.index(b"}\r\n")+1]
                        imgUrlJson = None
                    print(readData4G)
                    sendStep = 18
                    break
                if readData4G != None:
                    print("@17:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 18:
            #Terminate http
            uart4G.write('AT+HTTPTERM\r\n')
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+HTTPTERM\r\n\r\nOK\r\n' in readData4G:
                    sendStep = 20
                    break
                if readData4G != None:
                    print("@18:", readData4G)
                    break
            time.sleep(sleepTime)
        elif sendStep == 19:
            #Send message
            uart4G.write('AT+HTTPPARA="URL","{}"\r\n'.format(url))
            while 1:
                readData4G = uart4G.read()
                if readData4G != None and 'AT+HTTPPARA="URL",' in readData4G and 'OK\r\n' in readData4G:
                    sendStep = 16
                    break
                if readData4G != None:
                    print("@19:", readData4G)
                    break
            time.sleep(sleepTime)
        else:
            if imgUrlJson:
                sendStep = 5
                return imgUrlJson
            elif responseJson:
                sendStep = 5
                return responseJson
            else:
                sendStep = 17
                #return None
            time.sleep(1)
        print(sendStep)