Setting the LED_BUILTIN value Recent version of Arduino IDE have a pre-definedLED_BUILDINdefined that can be used as the pin that is connected that boards led. This presents a problem for the ESP-01 and ESP-01S which are both programmed using the Generic ESP8266 setting but which have di...
注意修改 Wi-Fi名和 Wi-Fi密码,如果是本地mqtt服务器的话地址填 127.0.0.1 #include <SimpleDHT.h>#include<ESP8266WiFi.h>#include<PubSubClient.h>intpinDHT11 =2;//GPIO2 of ESP8266constchar* ssid ="XXXXX";//手机Wi-Fi热点constchar* password ="XXXX";//手机Wi-Fi密码constchar* mqtt_server ...
Power supply: 3.7V-5V DC power supply to the VCC GND (2.54mm pin) Download the program to ESP-01S Insert the ESP-01 / ESP-01S into the 2 * 4 Pin header. Package Included: 1 * WS2812 RGB LED Controller ESP8266 ESP-01 ESP-01S Socket Module 1 * 3 Pin Connect Wire View ...
On the ESP-01, LEDs were attached to TX and Power signals, this is commonly done for Arduino boards but for the ESP-01S a single LED is attached to the GPIO2 line. On the ESP-01 the LED is attached to the TX line (this is the LED_BUILTIN LED) that allowed you to make a ...
Lightweight and Portable:At a lightweight design, this adapter module is easy to carry and use in various settings, from home automation to industrial applications. Esp Platform|Arduino Bluetooth Shield|Versatile Voltage Compatibility:Supports 3.3V/5V logic with onboard level shift circuit, ensuring ...
Reconnect the RX and TX cables between the UNO and ESP-01. Also, connect the UNO's RESET pin to Ground. The CH_PD or CH_EN pin stands for 'Chip Power-Down' or 'Chip Enable' and it needs to be pulled HIGH or connected to 3.3 V in order to enable the ESP chip. ...
2. How to select which built-in Ethernet or shield to useIn examples' defines.hDefine UPNP_USING_ETHERNET == true and UPNP_USING_WIFI == false // Select UPNP_USING_WIFI for boards using built-in WiFi, such as Nano-33-IoT #define UPNP_USING_WIFI false #define UPNP_USING_ETHERNET ...
(pinDHT11);longlastMsg =0;charmsg[50];intvalue =0;voidsetup() {//pinMode(BUILTIN_LED, OUTPUT);//将BUILTIN_LED引脚初始化为输出Serial.begin(115200);setup_wifi();client.setServer(mqtt_server,1883);client.setCallback(callback);}voidsetup_wifi() {delay(10);WiFi.begin(ssid, password);...