【得捷电子Follow m3第3期】任务6：综合实践|WiFi信号追踪

alanlan86 · 发表于2023-11-19 17:44

【得捷电子Follow m3第3期】任务6：综合实践|WiFi信号追踪 [复制链接]

#准备工作
- WiFi信号强度追踪，可直接参考：[WiFi RSSI Tracker](https://wiki.seeedstudio.com/XIAO_ESP32C3_MicroPython/ "WiFi RSSI Tracker")
- ESP32-C3 XIAO开发板及扩展板一块
![](https://files.seeedstudio.com/wiki/wiki-ranger/Contributions/C3-MicroPy/C3-MicroPython10.jpg)

#硬件
- 外扩SSD1306的话，接入SCL=7 SDA=6
- 将2.4G WiFi天线接上

#软件
- 整改代码的过程，可以参看中文注释部分！

```python
import network
import time
from time import sleep
import machine
from machine import Pin, SoftI2C
import ssd1306
import math

# ESP32C3 Pin assignment
i2c = SoftI2C(scl=Pin(7), sda=Pin(6))  # Adjust the Pin numbers based on your connections
oled_width = 128
oled_height = 64
oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)

# Network settings
wifi_ssid = "SSID-XXX"#替换为你的SSID
wifi_password = "PASSWORD-XXX" #替换为你的PASSWORD
machine.freq(160000000)  # Set CPU frequency to 160 MHz (ESP32 specific)
oled.text("Starting up...", 0, 0)
oled.show()

#链接AP路由器
station = network.WLAN(network.STA_IF)
station.active(True)
station.connect(wifi_ssid, wifi_password)
time.sleep(1)

while not station.isconnected():
    time.sleep(1)

#显示正在链接
oled.fill(0)
oled.text("Connecting to", 0, 0)
oled.text(wifi_ssid, 0, 20)
oled.show()
time.sleep(2)

#链接成功显示IP地址
oled.fill(0)
ip_address = station.ifconfig()[0]  # Get the IP address
oled.text("Connected! ", 0, 0)
oled.text("IP Address:", 0, 20)
oled.text(ip_address, 0, 40)
oled.show()
time.sleep(2)

# Buzzer settings
buzzer_pin = machine.Pin(5, machine.Pin.OUT)
buzzer = machine.PWM(buzzer_pin)
buzzer.freq(1047)
buzzer.duty(0)

center_x = oled_width // 2
center_y = oled_height // 2
square_size = 6  # Size of each square
num_squares = 12  # Number of squares
angle_increment = 2 * math.pi / num_squares

x_pos = [12, 38, 64, 90]
statuses = ["poor", "normal", "good", "excellent"]

#根据RSSI显示信号强度方块
def calculate_block_count(rssi):
    # Determine the number of blocks based on RSSI values
    if -80 <= rssi < -60:
        return 1
    elif -60 <= rssi < -40:
        return 2
    elif -40 <= rssi < -20:
        return 3
    elif -20 <= rssi <= 10:
        return 4

#绘画方块
def draw_blocks(count):
    for i in range(count):
        y_pos = 50 - calculate_block_height(i)
        oled.fill_rect(x_pos<i>, y_pos, 24, calculate_block_height(i), 1)
    for i in range(count, 4):  # Clear unused area
        y_pos = 50 - calculate_block_height(i)
        oled.fill_rect(x_pos<i>, y_pos, 24, calculate_block_height(i), 0)

#计算方块高度
def calculate_block_height(index):
    return 10 * (index + 1)

loop_count = 0  # Initialize loop count

while loop_count < 2:  # Execute the loop 24 times
    oled.fill(0)  # Clear the screen
    
    for i in range(num_squares):
        angle = i * angle_increment
        x = int(center_x + (center_x - square_size-30) * math.cos(angle))
        y = int(center_y + (center_x - square_size-30) * math.sin(angle))
        
        # Draw all squares
        for j in range(num_squares):
            angle_j = j * angle_increment
            x_j = int(center_x + (center_x - square_size-30) * math.cos(angle_j))
            y_j = int(center_y + (center_x - square_size-30) * math.sin(angle_j))
            
            oled.fill_rect(x_j, y_j, square_size, square_size, 1)  # Draw the square
        
        oled.fill_rect(x, y, square_size, square_size, 0)  # Erase the current square
        oled.show()
        time.sleep_ms(100)  # Pause before next iteration
        
    loop_count += 1  # Increase loop count

oled.fill(0)  # Clear the screen after finishing the loops
oled.show()

while True:
    oled.fill(0)
    station = network.WLAN(network.STA_IF)
    time.sleep(0.1)
    rssi = station.status('rssi')
    rssi_duty = 160 + 2 * int(rssi)
    rssi_duty_2 = int(rssi_duty / 2)
    rssi_abs = abs(int(rssi)) / 100
 
    block_count = calculate_block_count(rssi)
    status = statuses[block_count - 1]  # Get the status text based on block count
    
    draw_blocks(block_count)
    
    oled.text(status, 11, 56)
    
    oled.text("RSSI:", 0, 0)
    oled.text(str(rssi), 40, 0)
    # Update the display
    oled.show()

buzzer.duty(rssi_duty)
    time.sleep(rssi_abs)
    buzzer.duty(0)
    time.sleep(rssi_abs)
    buzzer.duty(rssi_duty_2)
    time.sleep(rssi_abs)
    buzzer.duty(0)
    time.sleep(rssi_abs)

```

#调试

<div id="player_c35f1dba61a2542337105075195afccd0" class="localvideo-box"></div><div class="localvideo-title">任务6：综合实践-WiFi信号追踪</div><br/>