firebeetle esp32 e schematic firebeetle esp32 e schematic
Schematics, PCB layout, gerber and BOM files of ESP8684-MINI-1. In this state it draws about 23 A if the "LowPower-Pad" to the RGB-color-LED is cut. This document introduces the specifications of ESP32-C3-MINI-1 and ESP32-C3-MINI-1U hardware, including overview, pin definitions, functional description, peripherals, and electrical characteristics, etc. Schematics, PCB layout, Gerber and BOM files of ESP32-DevKitC-V4. This document introduces the specifications of ESP32-WROOM-32E and ESP32-WROOM-32UE hardware, including overview, pin definitions, functional description, peripherals, and electrical characteristics, etc. on ESP32. Hardware. The display shows DFRobot" and "20220828" when all ready. Besides, the stamp hole design makes it able to be easily embedded in your PCB, greatly saving your costs and time to build and test a prototype. It is both a website and a mobile app of free service with the following slogan: "Put the Internet to work for you". Returns -1 if there is no readable data. This chapter starts with blinking an LED to demonstrate the usage of FireBeetle 2 ESP32-E. ESP32, ESP32-S2, ESP32-S3, ESP32-C2, and ESP32-C3. Return value: a boolean value, true if the removal is successful, false if the removal fails. The GDI on the expansion shield only supports ESP32-E. This document provides the specifications of ESP32 family of chips. data, the data to be written (can be of type char, byte, int, long, or String). Besides, the stamp hole design makes it able to be easily embedded in your PCB, greatly saving your costs and time to build and test prototype. The folder to be removed must be empty. When using the SD library, the serial monitor does not show any print output or displays a connection failure after uploading the program. Practically, the difference between previous Firebeetle ESP32 (SKU:DFR0478) and ESP32-E (SKU:DFR0654) did not matter, because I looked up the GPIO / Pin definitions from the DFRobot schematic and Wiki and did not use the Pin numbers like D<number>. Using FireBeetle 2 ESP32-E as a BLE server, the client can be a mobile phone. There should be one URL for each line. The FireBeetle 2 ESP32-E, specially designed for IoT, is an ESP-WROOM-32E-based main controller board with dual-core chips. The guidelines outline recommended design practices when developing standalone or add-on systems based on the ESP8684 series of products. Syntax: file.write(data) and file.write(buf, len). Low-power consumption(the electricity current under ultra-low power is 10A), Quick Response(the top frequency is 400KHz), Support electric current of low power consumption: 10 A. This document provides information about 1-wire, 2-wire, and 3-wire Wi-Fi coexistence schemes for Espressif customers when configuring devices equipped with ESP Wi-Fi SoCs (including all ESP chip series except ESP8266 and ESP32 series). 4us protecting interval. The ESP32 supports both STA and AP mode for WiFi connection. This digital representation can then be processed, manipulated, computed, transmitted or stored. This user guide will help you get started with ESP32-S3-Korvo-2 V3.0 and will also provide more in-depth information. V shaped gilded I/O interface, can be sewn on clothesdirectly. The other day my friend asked me to help him remake his compost bin, he wants a device that allows him to remotely get the real-time temperature and humidity inside. Close the window. Optimized 32.768 KHz crystal oscillator stability, the issue was reported by the client that there is a low probability that under ECO V1 hardware, the 32.768 KHz crystal oscillator couldnt start properly. Description: Seek to a specified position. The default configured pins can be seen in the pinout diagram. So, I am going to use it here. This user guide provides information on ESP32-Korvo V1.1, a dual-core ESP32-based audio development board with microphone arrays. The screen configuration is shown below: Please refer to the GDL display screen wiki for specific usage instructions. Download GDL library: https://github.com/cdjq/DFRobot_GDL. This document introduces the algorithms and models in ESP-SR via some simple examples. AT Instruction Set based on ESP8266_RTOS_SDK. Schematics, PCB layout, gerber and BOM files of ESP32-S3-WROOM-2. ArduinoRTOSmicroPython Programming Support. This document introduces the specifications of ESP32-S2-WROOM and ESP32-S2-WROOM-I hardware, including an overview, pin definitions, functional description, peripherals, electrical characteristics, etc. Note: The programs for the host and slave are created in separate windows, and should be compiled and uploaded separately. Open Arduino IDE, click File-Preferences, as shown below, Enter "ESP32" in the search bar, then the SDK for. On when charging; 3. It is widely used in many fields such as lighting control, motor speed control, measurement, communication, power control and conversion. In this section, we will obtain the ambient light intensity by driving LTR390-UV light sensor based on the default I2C configuration. This is the documentation forESP-IoT-SolutionDevelopment Framework. [[miniCur.nowCur]], Bluetooth microcontrollor selection guide, ESP32 Deep Sleep Tutorial for Low Power Projects, ESP32, more powerful than any other Arduino, Controlling Air Conditioner temperature automatically with ESP32. This document summarizes the packing requirements of Espressifs module products, including the packing method, packing-material dimensions, standard packing quantity, labels, dry-packing requirements and marking conventions. This document introduces the hardware specifications of ESP32-WROOM-32D and ESP32-WROOM-32U Datasheet. - Return value: A boolean value. Most of the I/O pins are broken out to the pin headers on both sides for easy interfacing. This document introduces the specifications of ESP32-S3-WROOM-1 and ESP32-S3-WROOM-1U hardware, including overview, pin definitions, functional description, peripherals, and electrical characteristics, etc. The getting started guide for the ESP-EYE AIOT development board. Note: The ADC on ESP32 can only measure around 2.5V instead of 3.3V, as shown in the example below. Introduction: Today were going to be building a wireless outdoor weather station that takes temperature, humidity, barometric pressure, light and wind speed readings, and uses WiFi to post the data to the cloud which can then be accessed through a Thingspeak dashboard. The ESP32 series consist of a Tensilica Xtensa LX6 32-bit, dual-core microprocessor(has two processors) running . When the program is uploaded, open serial monitor and you can see that the UV sensor is constantly collecting the current light intensity value. This document introduces the ESP32 Bluetooth architecture. FireBeetle was originally designed to be a high-performance and more Mini Arduino open-source development board series. The PWM controller of ESP32 has 16 independent channels, which can be configured to generate PWM signals with different properties. Cannot retrieve contributors at this time. This document introduces how to use EspRFTestTool to conduct an RF performance test, ESP-DSP is the official DSP library for the, ESP8266_RTOS_SDK is the official development framework for the. Configuration. buf: a character array or byte data. This document introduces the specifications of ESP32-WROOM-DA hardware, including overview, pin definitions, functional description, peripherals, and electrical characteristics, etc. The LED(circled in red below) on FireBeetle 2 ESP32-E is default to be connected to pin 2/D9. Fig1: FireBeetle Board-ESP32 PinOUT Note: NC = Empty; VCC = VCC (5V under USB power supply, Around 3.7V under 3.7V lipo battery.power supply) Tutorial In this tutorial, we'll show you some basic operation with FireBeetle-ESP32 Microcontroller. If you want to plug the Firebeetle shield into your Firebeetle mainboard, the Firebeetle 2 Board ESP32-E(Pre-soldered) is better for you. This document provides information on ESP32-S2-DevKitC-1 development board. This application note describes the recommended placement of the antenna on a host board to ensure optimal RF performance. Frameworks. After that, connect your FireBeetle 2 ESP32-E to your computer. Support MCU and Wi-Fi &Bluetooth dual-mode communication. DFRobot dedicated Display interface. The manual provides detailed and complete information on how to use the ESP8684 memory and peripherals. This guide shows how to get started with the ESP32-LyraT-Mini development board and also provides information about its functionality and configuration options. This document introduces the ESP32 AT commands, explains how to use them and provides examples of several common AT commands. When the program is uploaded, you can see the obtained time as shown in the figure below. FireBeetle Board - ESP32 integrates a Dual-Core ESP-WROOM-32 module, which supports MCU and Wi-Fi &Bluetooth dual-mode communication. FireBeetle 2 ESP32-E IoT Microcontroller with Header (Supports Wi-Fi & Bluetooth), Smart Compost Bin Monitoring System -Based on 4G IoT and SHT20, ESP32 Dual-core low power main controller, 10uA power consumption, Onboard Charging Circuit and PH2.0 lithium Battery Interface, Processor: Tensilica LX6 dual-core processor (One for high-speed connection; one for independent application development), Wi-Fi Protocol: 802.11 b/g/n/d/e/i/k/r (802.11nspeed up to 150 Mbps), A-MPDU and A-MSDU Aggregation, support 0.4us guard interval), Bluetooth Protocol: Bluetooth v4.2 BR/EDR and BLE standard compliant, On-chip Clock: 40MHz crystal, 32.768KHz crystal, Connector: FireBeetle V2 series compatible, FireBeetle 2 Board ESP32-E with Header x1. Meanwhile, these IO pins can be multiplexed for other functions such as UART, SPI, I2C and so on. This guide provides the parameter configuration for ESP8266 phy init bin. This document provides the specifications for the ESP32-SOLO-1 module. It supports WiFi and Bluetooth dual-mode communication and features a small size, ultra-low power consumption, on-board charging circuit, and easy-to-use interface, which can be conveniently used for smart home IoT . This document introduces the specifications of ESP32-S2-MINI-2 and ESP32-S2-MINI-2U hardware, including overview, pin definitions, functional description, peripherals, and electrical characteristics, etc. Description: Removes a file from the SD card. ESP-Jumpstart is focused on buildingproductson ESP32. - Configure Parameters in Arduino Code. This document describes differences between chip revision v3.0 and previous ESP32 chip revisions. You probably notice the LED has only one pin connected to the ESP32, while we need to drive the three colors (red, green and blue). This document introduces the specifications of ESP32-PICO-V3-ZERO hardware, including overview, pin definitions, functional description, peripherals, and electrical characteristics, etc. 305 KB Download. The File class provides the functionality to read/write files, and its member functions are similar to the serial-related functions previously used. This interface is a DFRbot dedicated GDI display interface for connecting a screen using a 18pin-FPC wire. Description: Get the position in the current file (i.e. -.02V). 4. FireBeetle 2 ESP32-E development board has two hardware serial ports, and both of them are remappable. This open source board of high-flexibilty could bring you infinite possibilities! Click to enter "Webhooks", and select "Receive a web request". V3.2-r1.0 Its member functions are as follows: Description: Initializes the SD card library and SD card. Off when fully charged or not charged; 2. This document introduces the ESP8266 sleep modes and some relevant low-powersolutions. The document focuses on ESP-NOW features, their uses and the demo code. When the digital pin outputs high, the LED turns on. Refer to the GDI part of this page. This document introduces to users the ESP32-MeshKit-Light, focusing on specifications, features, handling, etc. When the server receives data from a client, it sends the received data to the client as a notification. This document introduces how to use the DownloadTool. The Firebeetle has a VCC pin which supplies 5v when connected to USB or 3.7v when connected to a Li-ion battery, but I don't think this is regulated. Please find it in the "help" folder of the zip file. Digital I/O: 10 (default setting of arduino), Simulative input: 5(default setting of arduino), Dimension: 29 58(mm)/1.142 x 2.283(inches). Schematics, PCB layout, gerber and BOM files of ESP32-C3-WROOM-02. Introduction. Please find it in the "help" folder of the zip file. PWM (Pulse Width Modulation) is a very effective technique to control analog circuits using the digital output of MCU. - Return value: The number of bytes sent. Waveshare Display Screen:http://bit.ly/2JhvVN1Find more here:http://bit.ly/3hhyCL1$9.9 Daily Deals:http://bit.ly/2SZI7D7Download Banggood APP to get extra 1. - Return value: The object corresponding to the next file. UART0, also Serial in Arduino, is used for USB. In this lesson, we'll learn about the principle of serial communication. Return value: a boolean value, true if the file or folder exists, false if it does not exist. Processer: Tensilica LX6 dual core processer (One for high speed connection; one for independent programing). The main controller supports two power supply methods: USB and 3.7V . If triggers are triggered, actions set by users will be executed. Now make it blink by programming. Register an account if you don't have one. 2. You can also open the file in the following two modes: - FILE_READ: open the file in read-only mode; - FILE_WRITE: open the file in write mode. This document provides information on ESP32-C6-DevKitC-1 development board. The power consumption can be reduced to 13 A after controlling the maincontroller to enter the sleep mode through the program. Function: Get and set time from Network Time Server. ESP32-S2-WROOM-I reference design resources, including schematics, PCB layout, gerber files, and BOM list. You can install FastLED by referring to the method for installing the SDK of FireBeetle 2 ESP32-E before, as shown below, click "Install". filename, the name of the file to open. Hardware . Please find it in the "help" folder of the zip file. This document introduces the specifications of ESP32-WROOM-32SE hardware, including overview, pin definitions, functional description, peripherals, and electrical characteristics, etc. Once the Trigger is activated, the Action is executed to send a data email. Two channels can work independently. Program Function: Connect to the WiFi server created by FireBeetle 2 ESP32-E using a mobile phone, access 192.168.4.1, and remotely control the on/off state of the onboard LED. The getting started guide for ESP-WROVER-KIT. The electric current is just 10A in the deep-sleep mode. This document provides examples of using ESP32 for Bluetooth Networking for IoT devices, and introduces APIs related to networking development. 1. This document introduces the specifications of ESP8684-WROOM-03 hardware, including overview, pin definitions, functional description, and electrical characteristics, etc. This document provides the specifications for the ESP32-PICO-V3 SiP. Program: Use one FireBeetle 2 ESP32-E as the host and the other as the slave to establish a Bluetooth wireless communication, where the host sends data to the slave. Open the serial monitor and you can see the current value from the angle sensor printed in it. Returns -1 if there is no readable data. And both USB and external DC can charge the Lipo battery directly. Click to enter the official Arduino website. In the Arduino IDE, PWM output is defined as analog output. The table below provides users with a detailed description of FireBeetle 2 ESP32-E GPIO. Copy the key at the position shown below in the diagram. For ESP8266_RTOS_SDK V3.0 and later versions (ESP-IDF style). 3.1 Digital ports. If you need to use GDI for M0, please use the GDI integrated on the development board. 4.Select the ESP32-S3 main controller, than Press Boot, press RST and release both, then try burning again. https://download.dfrobot.top/FireBeetle/package_DFRobot_index.json to http://download.dfrobot.top/FireBeetle/package_DFRobot_index.json and reload it. True if the seek was successful, false if it failed. ESP-WROOM-02D and ESP-WROOM-02U module reference design resources, including schematics, PCB layout, gerber files, and BOM lists. This document provides the specifications of chip ESP32-S2. This document introduces how to use EspRFTestTool to conduct an RF performance test. This document introduces the specifications of ESP8685-WROOM-01 hardware, including overview, pin definitions, functional description, peripherals, and electrical characteristics, etc. BASE (optional), specifies the output format of the data: BIN (binary); OCT (octal); DEC (decimal); HEX (hexadecimal). Also some way of accurately measuring the sleep current is helpful, such as Dave Jones's Current. This user guide provides information on ESP32-PICO-DevKitM-2, a development board based onESP32-PICO-MINI-02 module. You will only be emailed about this product! Working current: 80mA in average. filename, the name of the folder to create. Description: Output data to a file and add a newline. ESP-Skainet is Espressif's intelligent voice assistant, which currently supports the Wake Word Engine and Speech Commands Recognition. This document introduces the specifications of ESP8685-WROOM-07 hardware, including overview, pin definitions, functional description, and electrical characteristics, etc. It can include a path, separated by "/". FireBeetle 2 ESP32-E, specially designed for IoT, is an ESP-WROOM-32E-based main controller board with dual-core chips.. DFR0654-F supports WiFi and Bluetooth dual-mode communication and features a small size, ultra-low power consumption, onboard charging circuit, and easy-to-use interface, which can be conveniently used for smart home IoT, industrial IoT applications, wearable devices, and so on. This document summarizes the packing requirements of Espressifs chip products, including the packing method, packing-material dimensions, standard packing quantity, labels, dry-packing requirements and marking conventions. FireBeetle ESP32 models include onboard circuitry to monitor battery voltage of a battery connected to its JST-PH2. Here an 8-bit resolution is used. DFR0478 FireBeetle ESP32 IOT Microcontroller(V3.0) . In the schematics of the FireBeetle 2, there is a built-in RGB led on the board: This RGB led is connected to the ESP32 pin IO5 (IO5/D8). Uploading. The on-board LED lights up when the button is pressed, and turns off when released. I tested this with an 18650 lithium-ion battery and can confirm this is true. 3.Run flash_download_tool_3.9.3.exe. The ESP-EYE development board reference design resources, including schematics, PCB layout, gerber files, and BOM lists. https://download.dfrobot.top/FireBeetle/package_DFRobot_index.json. Schematics, PCB layout, gerber and BOM files of ESP32-C3-MINI-1. Open the serial monitor, set the baud rate to 115200, and you can see the printed value increasing every second. DFR0225 Romeo V2-All in one Controller R3, DFR0100 DFRduino Beginner Kit For Arduino V3, DFR0428 3.5 inches TFT Touchscreen for Raspberry Pi, DFR0478 FireBeetle ESP32 IOT Microcontroller(V3.0), DFR0483 FireBeetle Covers-Gravity I O Expansion Shield, DFR0143 Triple Axis Accelerometer MMA7361, DFR0489 FireBeetle ESP8266 IOT Microcontroller, DFR0492 FireBeetle Board-328P with BLE4.1, DFR0498 FireBeetle Covers-Camera&Audio Media Board, DFR0507 FireBeetle Covers-OLED12864 Display, DFR0508 FireBeetle Covers-DC Motor & Stepper Driver, DFR0023 DFRobot LM35 Linear Temperature Sensor, DFR0511 FireBeetle Covers-ePaper Black&White Display Module, DFR0514 DFR0603 IIC 16X2 RGB LCD KeyPad HAT V1.0, DFR0524 5.5 HDMI OLED-Display with Capacitive Touchscreen V2.0, DFR0531 FireBeetle Covers-ePaper Black&White&Red Display Module, DFR0536 Micro bit Gamepad Expansion Board, DFR0550 5'' TFT-Display with Touchscreen V1.0, DFR0566 IO Expansion HAT for Raspberry Pi, DFR0024 Gravity DS18B20 Temperature Sensor V2, DFR0591 raspberry pi e-ink display module V1.0, DFR0604 I O Expansion HAT for Pi zero V1.0, DFR0024 Gravity DS18B20 Temperature Sensor V2, DFR0558 Gravity Digital High Temperature Sensor K-type, TEL0110 CurieCore intel Curie Neuron Module, TEL0121 FireBeetle Covers-LoRa Radio 433MHz, TEL0122 FireBeetle Covers-LoRa Radio 915MHz, TEL0125 FireBeetle Covers LoRa Radio 868MHz, ROB0150 Micro bit Circular RGB LED Expansion Board, SEN0072 CMPS09 - Tilt Compensated Magnetic Compass, SEN0032 Triple Axis Accelerometer Breakout - ADXL345, SEN0219 Gravity Infrared CO2 Sensor For Arduino, SEN0224 Gravity I2C Triple Axis Accelerometer - LIS2DH, SEN0226 Gravity I2C BMP280 Barometer Sensor, DFR0067 DHT11 Temperature and Humidity Sensor, DFR0066 SHT1x Humidity and Temperature Sensor, SEN0250 Gravity BMI160 6-Axis Inertial Motion Sensor, SEN0251 Gravity BMP280 Barometric Pressure Sensors, SEN0253 Gravity BNO055 + BMP280 intelligent 10DOF AHRS, Triple Axis Accelerometer FXLN83XX Series, SEN0137 DHT22 Temperature and humidity module, SEN0227 SHT20 I2C Temperature & Humidity Sensor Waterproof Probe, SEN0246 URM08-RS485 Waterproof Sonar Range Finder, SEN0304 URM09 Ultrasonic Sensor (Gravity-I2C) (V1.0), SEN0300 Water-proof Ultrasonic Sensor ULS, SEN0301 Water-proof Ultrasonic Sensor ULA, SEN0307 URM09 Ultrasonic Sensor Gravity Analog, SEN0311 A02YYUW Waterproof Ultrasonic Sensor, SEN0312 ME007YS Waterproof Ultrasonic Sensor, SEN0313 A01NYUB Waterproof Ultrasonic Sensor, TOY0054 SI7021 Temperature and humidity sensor, SEN0236 Gravity I2C BME280 Environmental Sensor Temperature, Humidity, Barometer, SEN0248 Gravity I2C BME680 Environmental Sensor VOC, Temperature, Humidity, Barometer, SEN0308 Waterproof Capacitive Soil Moisture Sensor, SEN0019 Adjustable Infrared Sensor Switch, SEN0143 SHARP GP2Y0A41SK0F IR ranger sensor 4-30cm, SEN0013 Sharp GP2Y0A02YK IR ranger sensor 150cm, SEN0014 Sharp GP2Y0A21 Distance Sensor 10-80cm, SEN0085 Sharp GP2Y0A710K Distance Sensor 100-550cm, DFR0300-H Gravity: Analog Electrical Conductivity Sensor(K=10), DFR0300 Gravity Analog Electrical Conductivity Sensor Meter V2 K=1, SEN0161-V2 Gravity Analog pH Sensor Meter Kit V2, SEN0237 Gravity Analog Dissolved Oxygen Sensor, SEN0204 Non-contact Liquid Level Sensor XKC-Y25-T12V, SEN0244 Gravity Analog TDS Sensor Meter For Arduino, SEN0249 Gravity Analog Spear Tip pH Sensor Meter Kit For Soil And Food Applications, SEN0228 Gravity I2C VEML7700 Ambient Light Sensor, SEN0017 Line Tracking Sensor for Arduino V4, SEN0212 TCS34725 I2C Color Sensor For Arduino, SEN0245 Gravity VL53L0X ToF Laser Range Finder, SEN0259 TF Mini LiDAR ToF Laser Range Sensor, SEN0262 Gravity Analog Current to Voltage Converter (4~20mA), DFR0027 DFRobot Digital Vibration Sensor V2, SEN0038 Wheel Encoders for DFRobot 3PA and 4WD Rovers, DFR0052 Analog Piezo Disk Vibration Sensor, SEN0170 Wind Speed Sensor Voltage Type 0-5V, TOY0048 High Accuracy Dual Axis Inclinometer Sensor Arduino Gadgeteer Compatible, SEN0186 Weather Station with Anemometer Wind vane Rain bucket, SEN0230 Incremental Photoelectric Rotary Encoder - 400P R, SEN0232 Gravity Analog Sound Level Meter, SEN0233 Air Quality Monitor PM 2.5, Temperature & Humidity Sensor, DFR0515 FireBeetle Covers-OSD Character Overlay Module, ROB0025 NEW A4WD Mobile Robot with encoder, ROB0124 HCR Mobile Platform with Omni Wheels, ROB0128 Devastator Tank Mobile Platform Metal DC Gear Motor, DFR0265 IO Expansion Shield for Arduino V7, DFR0312 Raspberry Pi GPIO Extension Board, DFR0327 Arduino Shield for Raspberry Pi 2B and 3B, DFR0412 Gravity IO Expansion Shield For DFRduino M0, DFR0502 Gravity IO Expansion & Motor Driver Shield V1.1, DFR0518 Micro Mate- A Mini Expansion Board for micro bit, DFR0578 Gravity I O Expansion Shield for OpenMV Cam M7, DFR0577 Gravity I O Expansion Shield for Pyboard, DFR0626 MCP23017 IIC to 16 digital IO expansion module, DFR0063 I2C TWI LCD1602 Module Gadgeteer Compatible, DFR0154 I2C TWI LCD2004 Module Arduino Gadgeteer Compatible, TOY0005 OLED 2828 color display module .NET Gadgeteer Compatible, DFR0091 3-wire Serial LCD Module Arduino Compatible, DFR0347 2.8 TFT Touch Shield with 4MB Flash for Arduino and mbed, DFR0348 3.5 TFT Touch Shield with 4MB Flash for Arduino and mbed, DFR0387 TELEMATICS 3.5 TFT Touch LCD Shield, DFR0460 64x32 RGB LED Matrix - 4mm Pitch/64x32 Flexible RGB LED Matrix-4mm Pitch/64x32 Flexible RGB LED Matrix-5mm Pitch, DFR0461 Gravity Flexible 8x8 RGB LED Matrix, DFR0462 Gravity Flexible 8x32 RGB LED Matrix, DFR0463 Gravity Flexible 16x16 RGB LED Matrix, DFR0464 Gravity I2C 16x2 Arduino LCD with RGB Backlight Display, DFR0506 7'' HDMI Display with Capacitive Touchscreen, DFR0555\DF0556\DFR0557 Gravity I2C LCD1602 Arduino LCD Display Module, DFR0529 2.2 inches TFT LCD Display V1.0 (SPI Interface), FIT0352 Digital RGB LED Weatherproof Strip 60LED m*3m, DFR0645-G DFR0645-R 4-Digital LED Segment Display Module, SKU DFR0646-G DFR0646-R 8-Digital LED Segment Display Module, TEL0037 Wireless Programming Module For Arduino, TEL0087 USBBLE-LINK Bluno Wireless Programming Adapter, TEL0083-A GPS Receiver for Arduino Model A, DFR0342 W5500 Ethernet with POE Mainboard, TEL0107 WiFiBee-MT7681 Arduino WiFi Wireless Programming, TEL0112 Gravity 315MHZ RF Receiver Module, TEL0113 Gravity UART A6 GSM & GPRS Module, DFR0505 SIM7000C Arduino NB-IoT LTE GPRS Expansion Shield, DFR0057 Sensor Motor Drive Board - Version 2.2, TEL0070 Multi USB RS232 RS485 TTL Converter, SD2403 Real time clock Module SKU TOY0020, DFR0316 MCP3424 18-Bit ADC-4 Channel with Programmable Gain Amplifier, DFR0553 Gravity I2C ADS1115 16-Bit ADC Module Arduino & Raspberry Pi Compatible, DFR0117 Gravity I2C EEPROM Data Storage Module, DFR0503 Embedded Thermal Printer - TTL Serial, DFR0563 Gravity 3.7V Li Battery Fuel Gauge, DFR0576 Gravity Digital 1-to-8 I2C Multiplexer, DFR0399 DC Micro Metal Gear Motor 75 1 w Driver, DRI0021 Veyron 2x25A Brush DC Motor Driver, DRI0039 Quad Motor Driver Shield for Arduino, DRI0044 2x1.2A DC Motor Driver TB6612FNG, DFR0523 Gravity Digital Peristaltic Pump, SER0044 DSS-M15S 270 15KG DF Metal Servo with Analog Feedback, DRI0023 Stepper Motor Shield For Arduino DRV8825, DRI0035 TMC260 Stepper Motor Driver Shield, DFR0564 USB Charger for 7.4V LiPo Battery, DFR0559 Sunflower Solar Power Manager 5V, DFR0580 Solar Power Manager For 12V Lead-Acid Battery, KIT0098 Breadboard Plugin Components Pack, SEN0305 HUSKYLENS AI Machine Vision Sensor, Gravity: Analog Rotation Potentiometer Sensor for Arduino - Rotation 300, 1.54" 240x240 IPS wide viewing angle TFT display, 2.0" 320x240 IPS wide viewing angle TFT display, 2.8" 320x240 IPS TFT resistive touch display, 3.5" 480x320 IPS TFT capacitive touch display, 1.51" OLED Transparent Display with Converter, http://download.dfrobot.top/FireBeetle/package_DFRobot_index.json, Program download and power supply, 4.75V-5.5V compatible. One of the things I didn't like about the HiLetGo/NodeMCU board was the pins. Notice that the pin numbering is "2/D9". Therefore, it is best to use SD.exists(filename) to check if the file exists before removing the file. Integrate a Dual-Core ESP-WROOM-32 module. This document introduces the specifications of ESP8685-WROOM-03 hardware, including overview, pin definitions, functional description, and electrical characteristics, etc. . This document provides ESP8266 Wi-Fi channel selection guidelines.