stm32 mqtt数据提取
时间: 2023-10-10 14:11:17 浏览: 197
在STM32中提取MQTT数据的方法如下:
首先,下载MQTT的库Paho:https://github.com/eclipse/paho.mqtt.embedded-c。将MQTTPacket\src目录下的文件添加到工程,将MQTTPacket\samples下的transport.c和transport.h添加到工程中。
在代码中,可以使用transport_getdata函数来接收数据。该函数通过协议来完成接收数据的操作,recv函数仅仅是复制数据。recv函数返回实际复制的字节数。下面是一个示例代码:
```c
int transport_getdata(unsigned char* buf, int count) {
int rc = 0;
u16 len = 0;
u8 *data = 0;
while(1) {
if(UART7_RX_STA & 0X8000) { //接收到一次数据了
memcpy(buf, (void*)&UART7_RX_BUF<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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