USART2连接电脑能看见输出,但是接在ESP01S上没有反应。换了个程序ESP01可以连接到服务器。波特率,数据位,停止位,校验位两个程序都一样,发送格式也一样,只是在原程序基础上增加了USART1通讯,ESP-01S就收不到数据了
时间: 2024-05-25 18:10:16 浏览: 10
可能是ESP-01S未正确接收到数据,导致无法连接到服务器。建议您检查以下几个方面:
1. 检查ESP-01S的引脚连接是否正确,包括VCC、GND、TX、RX等引脚是否正确连接到STM32开发板上。
2. 检查ESP-01S的固件是否正常,可以通过将ESP-01S连接到电脑上,使用AT指令测试ESP-01S的正常工作状态。
3. 检查STM32开发板的程序是否正确,包括USART2和USART1通讯的配置是否正确,发送数据的格式是否正确等。
4. 确认ESP-01S的波特率、数据位、停止位、校验位等参数与STM32开发板的程序设置相匹配。
5. 尝试使用其他方法测试ESP-01S的连接状态,比如使用其他的串口调试工具进行测试。
相关问题
写一个基于STM32F103C8T6与ESP8266通过USART2串口连接,STM32F103C8T6发送AT指令给ESP8266连接服务器或发送数据程序,配置USART2接收中断在ESP8266发送的数据可以USART1串口显示
您好!我是CSDN开发的ChitGPT,一个类ChatGPT的AI,并且与OpenAI公司开发的ChatGPT没有关系。非常感谢您与我进行对话。
关于您的问题,您想要写一个程序,基于STM32F103C8T6和ESP8266通过USART2串口连接,让STM32F103C8T6发送AT指令给ESP8266连接服务器或发送数据,并且配置USART2接收中断,使ESP8266发送的数据可以通过USART1串口显示。以下是代码示例:
```
#include "stm32f10x.h"
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
void USART2_IRQHandler(void) // USART2中断处理函数
{
if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET) // 判断是否接收到数据
{
USART_SendData(USART1, USART_ReceiveData(USART2)); // 接收数据并通过USART1发送出去
}
}
int main(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE); // 开启GPIO和复用功能时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); // 开启USART2时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); // 开启USART1时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; // USART2 TX
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; // USART2 RX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; // USART1 TX
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; // USART1 RX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn; // 配置USART2中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_InitStructure.USART_BaudRate = 115200; // USART2波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_Init(USART2, &USART_InitStructure);
USART_InitStructure.USART_BaudRate = 115200; // USART1波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART2, ENABLE); // 使能USART2
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE); // 开启USART2接收中断
char at_cmd[] = "AT+CIPSTART=\"TCP\",\"server_ip\",port\r\n"; // AT指令
USART_SendString(USART2, at_cmd); // 发送AT指令给ESP8266连接服务器
while(1)
{
// 发送数据给ESP8266
}
}
void USART_SendChar(USART_TypeDef* USARTx, char ch) // 发送一个字符
{
USART_SendData(USARTx, (uint16_t)ch);
while(USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET);
}
void USART_SendString(USART_TypeDef* USARTx, char *str) // 发送一个字符串
{
while(*str)
{
USART_SendChar(USARTx, *str++);
}
}
```
需要注意的是,您需要将"server_ip"和"port"替换为您要连接的服务器的IP地址和端口号。另外,发送数据给ESP8266的代码部分需要根据您具体的需求进行编写。
希望我能帮到您,如果您有其他问题请随时提出。
可以帮我写一个基于stm32f103c8t6、esp8266串口WiFi和手机连接的代码
当然可以,以下是一个简单的示例代码,实现了stm32f103c8t6和esp8266之间的串口通信,并且可以通过WiFi与手机连接进行数据交互。
```c
#include "stm32f10x.h"
#include <stdio.h>
#include <string.h>
#define USART1_RX_GPIO_PORT GPIOA
#define USART1_RX_GPIO_CLK RCC_APB2Periph_GPIOA
#define USART1_RX_PIN GPIO_Pin_10
#define USART1_TX_GPIO_PORT GPIOA
#define USART1_TX_GPIO_CLK RCC_APB2Periph_GPIOA
#define USART1_TX_PIN GPIO_Pin_9
#define ESP8266_USART USART1
#define ESP8266_USART_CLK RCC_APB2Periph_USART1
#define ESP8266_USART_BAUDRATE 115200
#define ESP8266_RST_GPIO_PORT GPIOA
#define ESP8266_RST_GPIO_CLK RCC_APB2Periph_GPIOA
#define ESP8266_RST_PIN GPIO_Pin_8
#define ESP8266_CH_PD_GPIO_PORT GPIOA
#define ESP8266_CH_PD_GPIO_CLK RCC_APB2Periph_GPIOA
#define ESP8266_CH_PD_PIN GPIO_Pin_7
#define WIFI_SSID "your_wifi_ssid"
#define WIFI_PASSWORD "your_wifi_password"
#define SERVER_IP "192.168.1.100"
#define SERVER_PORT "8080"
#define BUFFER_SIZE 128
void USART_Config(void);
void GPIO_Config(void);
void ESP8266_Init(void);
void ESP8266_ConnectWiFi(void);
void ESP8266_ConnectServer(void);
void ESP8266_SendData(char* data);
int main(void) {
char buffer[BUFFER_SIZE];
USART_Config();
GPIO_Config();
ESP8266_Init();
ESP8266_ConnectWiFi();
ESP8266_ConnectServer();
while (1) {
// 读取串口数据
if (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_RXNE) == SET) {
char data = USART_ReceiveData(ESP8266_USART);
if (data == '\n' || data == '\r') {
buffer[strlen(buffer)] = '\0';
ESP8266_SendData(buffer); // 发送数据到服务器
buffer[0] = '\0';
} else {
strncat(buffer, &data, 1);
}
}
}
}
void USART_Config(void) {
USART_InitTypeDef USART_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(ESP8266_USART_CLK | USART1_TX_GPIO_CLK | USART1_RX_GPIO_CLK, ENABLE);
/* USART1_TX GPIO pin configuration */
GPIO_InitStructure.GPIO_Pin = USART1_TX_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(USART1_TX_GPIO_PORT, &GPIO_InitStructure);
/* USART1_RX GPIO pin configuration */
GPIO_InitStructure.GPIO_Pin = USART1_RX_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(USART1_RX_GPIO_PORT, &GPIO_InitStructure);
/* USART1 configuration */
USART_InitStructure.USART_BaudRate = ESP8266_USART_BAUDRATE;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(ESP8266_USART, &USART_InitStructure);
/* Enable USART1 */
USART_Cmd(ESP8266_USART, ENABLE);
}
void GPIO_Config(void) {
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(ESP8266_RST_GPIO_CLK | ESP8266_CH_PD_GPIO_CLK, ENABLE);
/* Configure RESET pin */
GPIO_InitStructure.GPIO_Pin = ESP8266_RST_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(ESP8266_RST_GPIO_PORT, &GPIO_InitStructure);
/* Configure CH_PD pin */
GPIO_InitStructure.GPIO_Pin = ESP8266_CH_PD_PIN;
GPIO_Init(ESP8266_CH_PD_GPIO_PORT, &GPIO_InitStructure);
/* Reset ESP8266 module */
GPIO_SetBits(ESP8266_RST_GPIO_PORT, ESP8266_RST_PIN);
GPIO_SetBits(ESP8266_CH_PD_GPIO_PORT, ESP8266_CH_PD_PIN);
GPIO_ResetBits(ESP8266_RST_GPIO_PORT, ESP8266_RST_PIN);
for (int i = 0; i < 5000000; i++);
GPIO_SetBits(ESP8266_RST_GPIO_PORT, ESP8266_RST_PIN);
for (int i = 0; i < 5000000; i++);
}
void ESP8266_Init(void) {
char buffer[BUFFER_SIZE];
USART_SendData(ESP8266_USART, "AT\r\n");
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_TXE) == RESET);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_RXNE) == RESET);
USART_ReceiveData(ESP8266_USART);
USART_SendData(ESP8266_USART, "AT+CWMODE=1\r\n");
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_TXE) == RESET);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_RXNE) == RESET);
USART_ReceiveData(ESP8266_USART);
USART_SendData(ESP8266_USART, "AT+RST\r\n");
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_TXE) == RESET);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_RXNE) == RESET);
USART_ReceiveData(ESP8266_USART);
for (int i = 0; i < 5000000; i++);
USART_SendData(ESP8266_USART, "AT+CWJAP=\"" WIFI_SSID "\",\"" WIFI_PASSWORD "\"\r\n");
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_TXE) == RESET);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_RXNE) == RESET);
USART_ReceiveData(ESP8266_USART);
for (int i = 0; i < 10000000; i++);
}
void ESP8266_ConnectWiFi(void) {
char buffer[BUFFER_SIZE];
USART_SendData(ESP8266_USART, "AT+CWJAP?\r\n");
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_TXE) == RESET);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_RXNE) == RESET);
USART_ReceiveData(ESP8266_USART);
for (int i = 0; i < 5000000; i++);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_RXNE) == RESET);
char data = USART_ReceiveData(ESP8266_USART);
while (data != '\r') {
strncat(buffer, &data, 1);
data = USART_ReceiveData(ESP8266_USART);
}
if (strstr(buffer, WIFI_SSID) != NULL) {
printf("Connected to WiFi: %s\n", WIFI_SSID);
} else {
printf("Failed to connect to WiFi: %s\n", WIFI_SSID);
}
}
void ESP8266_ConnectServer(void) {
char buffer[BUFFER_SIZE];
USART_SendData(ESP8266_USART, "AT+CIPSTART=\"TCP\",\"" SERVER_IP "\"," SERVER_PORT "\r\n");
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_TXE) == RESET);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_RXNE) == RESET);
USART_ReceiveData(ESP8266_USART);
for (int i = 0; i < 5000000; i++);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_RXNE) == RESET);
char data = USART_ReceiveData(ESP8266_USART);
while (data != '\r') {
strncat(buffer, &data, 1);
data = USART_ReceiveData(ESP8266_USART);
}
if (strstr(buffer, "CONNECT") != NULL) {
printf("Connected to server: %s:%s\n", SERVER_IP, SERVER_PORT);
} else {
printf("Failed to connect to server: %s:%s\n", SERVER_IP, SERVER_PORT);
}
}
void ESP8266_SendData(char* data) {
int len = strlen(data);
char buffer[BUFFER_SIZE];
sprintf(buffer, "AT+CIPSEND=%d\r\n", len);
USART_SendData(ESP8266_USART, buffer);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_TXE) == RESET);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_RXNE) == RESET);
USART_ReceiveData(ESP8266_USART);
for (int i = 0; i < 5000000; i++);
USART_SendData(ESP8266_USART, data);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_TXE) == RESET);
while (USART_GetFlagStatus(ESP8266_USART, USART_FLAG_RXNE) == RESET);
USART_ReceiveData(ESP8266_USART);
for (int i = 0; i < 5000000; i++);
}
```
注意,这只是一个简单的示例代码,可能需要根据实际情况进行修改和优化。
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