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Using ESP32 construct a ZIGBEE network adapter

2022-07-30 01:46:00 【ZhuoQing】

简介：利用 ESP32The networking,构建了一个 WiFi UDP 转 Zigbee的串口模块.The module is to just UDPInstructions sent toZigbee的网络中,Then replace the original function.注意,ESP32的网络地址为： 192.168.0.114.How can you get ESP32的IP地址呢？可以介入 192.168.0.1 WiFi网关,在DHCPCheck the list of customers to the server Espressif的IP地址.

关键词：ESP32,Zigbee

§01ZIGBEE网关

一、背景介绍

在 The third hand in laboratory：Slide rail parameters and control interface Given the slippery course of laboratory platform control parameters.These platforms are by connecting in “COM2” 上的 zigbee Communication module connected.Because now used by platform to the serial port Settings have a problem,Therefore plans to useESP32作为网桥,作为UDP转成COMOf the conversion bridge,This enables the original laboratory equipment can continue to use.

二、制作模块

1、ESP32模块

ESP32模块使用了基于ESP32The intelligent car race referee system ,This is from the high dragon company production for sale. 可以通过其中的TXD2,RXD2完成向ZIGBEE 发送信息.

▲ , ESP32The referee in the system serial port

▲ , ESP32The referee in the system serial port

2、ZIGBEE模块

下图给出了ZIGBEE的接口,Through the quad flat cables andESP32The system module.

▲ 图1.2.2 ZIGBEE接口与ESP32之间的接口

▲ 图1.2.2 ZIGBEE接口与ESP32之间的接口

三、软件编程

1、测试串口

参考在 The 17th intelligent car race game system software to modify-The time delay was more Blog forESP32Referee system software to modify the code,Write a serial port test software.代码如下：

from machine                import Pin,UART
import time
import machine

machine.freq(240000000)
uart1 = UART(2, baudrate=115200, rx=16, tx=17, timeout=10)
bz1 = Pin(21, Pin.OUT)
bz1.off

while True:
    uart1.write(bytes([0x55]))

    time.sleep_ms(10)

测试 TX2 Pin waveform for：

▲ 图1.3.1 发送0x55数据TX波形

▲ 图1.3.1 发送0x55数据TX波形

2、发送ZIGBEE命令

将ESP32连接到 ZIGBEE模块.

▲ 图1.3.2 连接ZIGBEE模块

▲ 图1.3.2 连接ZIGBEE模块

Through the following programs,每隔 500ms 发送一个relay click 指令,经过验证,动作正常.Demonstrating the wholeZIGBEESending process is normal.

from machine                import Pin,UART
import time
import machine

machine.freq(240000000)
uart1 = UART(2, baudrate=115200, rx=16, tx=17, timeout=10)
bz1 = Pin(21, Pin.OUT)
bz1.off

while True:
    uart1.write(b'solenoidrelay pulse 4 50\r')

    time.sleep_ms(500)
    print("SEND.")

3、连接WiFi接口

根据 ESP32模块的MicroPython的基本实验 对于ESP32Connected to the general experiment,将ESP32Access to the lab WiFi 热点,并建立UDP接口连接.

如下是完整的 ESP32程序.使用 Thonny IDE 将 The following program written toESP32内部FLASH,并启动.

from machine                import Pin,UART
import machine,time, network, usocket

machine.freq(240000000)
uart1 = UART(2, baudrate=115200, rx=16, tx=17, timeout=10)
bz1 = Pin(21, Pin.OUT)
bz1.off()

wlan = network.WLAN(network.STA_IF)
wlan.active(False)

wlan.active(True)
time.sleep_ms(100)
wlan.connect('TENDA626A', 'gniqouhz')

bz1.on()
while not wlan.isconnected():
    time.sleep_ms(100)

wlan.ifconfig()

bz1.off()

us = usocket.socket(usocket.AF_INET, usocket.SOCK_DGRAM)
sockaddr = usocket.getaddrinfo('0.0.0.0', 4567)[0][-1]
us.bind(sockaddr)

while True:
    data,addr = us.recvfrom(1024)

    if len(data) > 0:
        bz1.on()
        uart1.write(data)
        bz1.off()