文章目录

• 前言
• 软件准备
• 硬件准备
• 接线
• C/C++实现代码
• • 实验现象
• Micropython实现代码
• • 实验现象
• 参考资料

前言

• Raspberry pi pico官网介绍：https://www.raspberrypi.org/documentation/rp2040/getting-started/#board-specifications
• ESP8266官网介绍：https://www.espressif.com/zh-hans/products/socs/esp8266

软件准备

根据树莓派官网的介绍，基于Raspberry pi pico我们可以搭建两种开发环境： Micropython和C/C++

关于开发环境的搭建，国内已经有很多优秀的课程了，我是参考韦东山百问网出的教程搭建的开发环境：

• Micropython：https://www.bilibili.com/video/BV1ZK411c7yf?p=4
• C/C++：https://www.bilibili.com/video/BV1ZK411c7yf?p=5

硬件准备

在开始实验之前，需要准备好一下的硬件：
Raspberry pi pico开发板

ESP8266串口wifi

接线

uart0我用于串口模块连接到PC显示串口信息，所以我从uart1开始使用，uart1分配给ESP8266使用。

C/C++实现代码

/** * Copyright (c) 2008-2021 深圳百问网科技有限公司 * * SPDX-License-Identifier: BSD-3-Clause */#include #include #include #include "pico/stdlib.h"#include "pico/multicore.h"#include "hardware/gpio.h"#include "hardware/uart.h"#define UART_ID uart1#define BAUD_RATE 115200#define UART_TX_PIN 4#define UART_RX_PIN 5#define RECV_BUFFER 256char recv_buf[RECV_BUFFER];int buff_count = 0;void core1_entry() {    memset(recv_buf,'0',RECV_BUFFER);    while (1) { //printf("%c", uart_getc(UART_ID)); recv_buf[buff_count++] = uart_getc(UART_ID);   if(buff_count >= RECV_BUFFER )   buff_count = 0;    }}int main() {    stdio_init_all();    // Set up our UART with the required speed.    uart_init(UART_ID, BAUD_RATE);    // Set the TX and RX pins by using the function select on the GPIO    // Set datasheet for more information on function select    gpio_set_function(UART_TX_PIN, GPIO_FUNC_UART);    gpio_set_function(UART_RX_PIN, GPIO_FUNC_UART);    multicore_launch_core1(core1_entry);    printf("Setting up network on ESP8266...\n");    printf("  - Setting CWMODE to 1 station mode...\n");    uart_puts(UART_ID, "AT+CWMODE=1\r\n");    sleep_ms(2000);    printf("  - Joining Wifi ...'\n");    uart_puts(UART_ID, "AT+CWJAP=\"baiwenwang\",\"www.100ask.org\"\r\n");    sleep_ms(5000);    printf("done!\n\n");    printf("Starting Webserver port on ESP8266...\n");    sleep_ms(1000);    printf("  - Setting CIPMUX for multiple connections...\n");    uart_puts(UART_ID, "AT+CIPMUX=1\r\n");    sleep_ms(2000);    printf("  - Starting CIPSERVER on port 80...\n");    uart_puts(UART_ID, "AT+CIPSERVER=1,80\r\n");    printf("done!\n\n");    sleep_ms(1000);    // 查询本地 IP 地址    uart_puts(UART_ID, "AT+CIFSR\r\n");    sleep_ms(1000);    printf("%s\n", recv_buf);      printf("Waiting For connection...\n");    while (true) { if (strstr(recv_buf, "+IPD")) {  printf("! Incoming connection - sending webpage");     uart_puts(UART_ID, "AT+CIPSEND=0,108\r\n");  // Send a HTTP response then a webpage as bytes the 108 is the amount of bytes you are sending, change this if you change the data sent below     sleep_ms(1000);     uart_puts(UART_ID, "HTTP/1.1 200 OK\r\n");     uart_puts(UART_ID, "Content-Type: text/html\r\n");     uart_puts(UART_ID, "Connection: close\r\n");     uart_puts(UART_ID, "\r\n");     uart_puts(UART_ID, "\r\n");     uart_puts(UART_ID, "\r\n");     uart_puts(UART_ID, "It Works!\r\n");     uart_puts(UART_ID, "\r\n");     sleep_ms(1000);     uart_puts(UART_ID, "AT+CIPCLOSE=0\r\n");    // close the connection when done.     sleep_ms(4000);     printf("\n\nWaiting For connection...\n");     sleep_ms(250);     memset(recv_buf,'0',RECV_BUFFER);     buff_count = 0; }    }}

实验现象

Micropython实现代码

## Copyright © 2021 深圳百问网科技有限公司 All Rights Reserved.# https://www.100ask.net# https://shop502068889.taobao.com/## SPDX-License-Identifier: BSD-3-Clause#from machine import UARTimport machineimport _threadimport timerecv_buf="" # receive buffer global variableprint('-- ESP8266 Webserver --')print (' ')print ('setting up UART Connection...')uart = UART(1,115200) # create a UART serial connection using UART1 pins and a baud of 115200print ('done!')print (' ')#Function to read serial response from UART serial into buffer one byte at a timedef uartSerialRxMonitor():    recv="" while True: recv=str(uart.read(1).decode("utf-8")) print(recv, end='') global recv_buf recv_buf=recv_buf+recvprint ('Starting connection to ESP8266...')_thread.start_new_thread(uartSerialRxMonitor, ()) # start serial monitor as a threadprint ('done!')print (' ')print ('Setting up network on ESP8266...')print ('  - Setting CWMODE to 1 station mode...')uart.write('AT+CWMODE=1'+'\r\n')time.sleep(2)print ('  - Joining Wifi ...')uart.write('AT+CWJAP="baiwenwang","www.100ask.org"'+'\r\n') # set Wifi network SSID and password heretime.sleep(5)print ('done!')print (' ')print ('Starting Webserver port on ESP8266...')time.sleep(4)print ('  - Setting CIPMUX for multiple connections...')uart.write('AT+CIPMUX=1'+'\r\n')time.sleep(2)print ('  - Starting CIPSERVER on port 80...')uart.write('AT+CIPSERVER=1,80'+'\r\n')print ('done!')print (' ')time.sleep(1)print (' ')print ('Waiting For connection...')while True:    if '+IPD' in recv_buf: #IPD in serial indicates an incoming connection time.sleep(2) print ('! Incoming connection - sending webpage') uart.write('AT+CIPSEND=0,108'+'\r\n') #Send a HTTP response then a webpage as bytes the 108 is the amount of bytes you are sending, change this if you change the data sent below time.sleep(1) uart.write('HTTP/1.1 200 OK'+'\r\n') uart.write('Content-Type: text/html'+'\r\n') uart.write('Connection: close'+'\r\n') uart.write(''+'\r\n') uart.write(''+'\r\n') uart.write(''+'\r\n') uart.write('It Works!'+'\r\n') uart.write(''+'\r\n') time.sleep(1) uart.write('AT+CIPCLOSE=0'+'\r\n') # close the connection when done. time.sleep(4) print (' ') print (' ') print ('Waiting For connection...') recv_buf=""

实验现象

参考资料

ESP8266 AT指令集