DF ROBOT FIREBEETLE BOARD-ESP32 Manuel utilisateur

FIREBEETLE

BOARD-ESP32

USER MANUAL

V0.1

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CONTENTS

CONTENTS ...................................................................................................................................................2

Chapter1 Introduction................................................................................................................................3

Introduction of FireBeetle ...........................................................................................................................3

Introduction of FireBeetle Board-ESP32.....................................................................................................4

Chapter2: Quick-start ................................................................................................................................7

FireBeetle Board-ESP32 Hardware.............................................................................................................7

Characteristics..........................................................................................................................................7

Specification.............................................................................................................................................8

Arduino IDE for FireBeetle Board-ESP32.....................................................................................................9

STEP1: The way to download Arduino IDE software. ...........................................................................9

STEP2: Language setting of Arduino IDE .............................................................................................11

STEP3: Installation of the core center of the FireBeetle Board-ESP32 development board. .......11

STEP4: Connect FireBeetle Board-ESP32 to computer. .....................................................................13

STEP5: Processing in the Arduino IDE....................................................................................................15

STEP6: Upload codes to FireBeetle-ESP32 motherboard. .................................................................16

Chapter 3: The Basics of Using Peripherals in the FireBeetle Board-ESP32.......................................20

Project1: The experiment of Serial Port ...................................................................................................20

Project2: PWM (Breathing light) ...............................................................................................................22

Project3 ADC ..............................................................................................................................................25

Project4 I2C.................................................................................................................................................28

Project5 SPI..................................................................................................................................................35

Project6: Hall Sensor ..................................................................................................................................39

Project7 DAC ..............................................................................................................................................41

Project8 Touch Sensor ...............................................................................................................................43

Project9 Deep_Sleep (Low power Management)................................................................................45

*Click the top left corner, the community of DFRobot, a pleasant surprise!

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Chapter1 Introduction

Introduction of FireBeetle

FireBeetle has been translated to firefly in Chinese. It is a new product range that developed by

DFRobot. The ultralow-power design of external hardware and small compatibility interface can

fast build Internet of Things (IOT) conveniently.

In simple terms, FireBeetle is an easy to use Internet of Things development platform. It is based on

the theme of series of low-power hardware development and designed to work simple for

intelligent hardware enthusiasts, interaction designers and electronic software engineers.

For example, a simple Internet of Things project ── intelligent watering device of real-time soil

moisture monitoring. When the humidity is less than 300(a parameter), it will control the pump

watering and upload data in every 5 mins. Therefore, you can check the real-time data on apps

of mobile phones, such as Blynk. You can also monitor the ambient temperature by the installation

of temperature and humidity sensors on the watering device. See, it’s so easy to build an

intelligent watering device!

There are three categories of FireBeetle, containing Boards (main control), Covers (expansion

boards) and related Accessories. The core controller chips of Boards mainly are MCUs such as ESP32,

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Bluno etc. These chips are of high performance, low power consumption and has the function of

wireless transmission. Covers contain LED dot matrixs, I2S audio drivers, GPS/GPRS/SIM etc. They can

provide rich peripherals for the motherboard. Accessories contain 2.54mm pin headers, female

headers, LED lights, buttons and other extensible peripheral hardware.

Caution: A lurry of FireBeetle products are still in development.

Introduction of FireBeetle Board-ESP32

FireBeetle Board-ESP32 is one of the FireBeetle series and the chip of the master control board is

ESP32. Aimed at Internet of Things, the SOC combines Wi-Fi, Bluetooth and MCU. The master

control board uses ultra-low power consumption external hardware design (an actual

measurement of the electricity current under low power consumption mode is 10 μA), supporting

onboard lithium battery charging. The best choice for mobile devices, wearable electronics and

IOT applications. It can directly use to low power consumption projects.

Additionally, FireBeetle Board-ESP32 has abundant peripheral equipment, e.g. ADC，I2C，I2S，

SPI，UART etc. And the programming is completely compatible with Arduino IDE.

Caution: All peripheral equipment of FireBeetle Board-ESP32 control board can be configured to

any pin. When programed with Arduino IDE, all peripheral equipments adopt default profile

except special one. The following image shows default profile and corresponding hardware IO.

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IO3/RXD：D0(Arduino), the RX of Serial, connects to IO3 of ESP32

IO1/TXD：D1(Arduino), the TX of Serial, connects to IO1 of ESP32

IO25/D2：D2 (Arduino) of GPIO digital input and output port and PWM output pin, connect to IO25 of ESP32.

IO26/D3：D3 (Arduino) of GPIO digital input and output port and PWM output pin, connect to IO26 of ESP32.

IO27/D4：D4 (Arduino) of GPIO digital input and output port and PWM output pin, connect to IO27 of ESP32.

IO9/ D5:D5 (Arduino) of GPIO digital input and output port and PWM output pin, connect to IO9 of ESP32.

IO10/D6：D6 (Arduino) of GPIO digital input and output port and PWM output pin, connect to IO9 of ESP32.

IO13/D7：D7 (Arduino) of GPIO digital input and output port and PWM output pin, connect to IO13 of ESP32.

IO5/D8：D8 (Arduino) of GPIO digital input and output port and PWM output pin, connect to IO5 of ESP32.

IO2/D9：D9 (Arduino) of GPIO digital input and output port and PWM output pin, connect to IO2 of ESP32.

CLK：Clock pin to IO6 of ESP32

SD0：SD0 port to IO7 of ESP32

SD1：SD1 port to IO7 of ESP32

CMD：CMD port to IO11 of ESP32

GND：Power line ground

AREF：input voltage for reference, here connect to NC.

3V3：3.3V Vo, can provide 600mA current out at most.

VCC：The Vi/Vo is 5V charged by USB and 3.7V charged by lithium battery.

IO36/A0：A0 (Arduino), analog input, connect to IO36 of ESP32.

IO39/A1：A1 (Arduino), analog input, connect to IO39 of ESP32.

IO34/A2：A2 (Arduino), analog input, connect to IO34 of ESP32.

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IO35/A3：A3 (Arduino), analog input, connect to IO35 of ESP32.

IO15/A4：A4 (Arduino), analog input, connect to IO15 of ESP32.

NC：Not connected

IO0：Digital interface, connect to IO0 of ESP32.

SCK：Clock pin of SPI, connect to IO18 of ESP32.

MOSI：SPI’s MOSI data-wire, connect to IO23 of ESP32.

MISO：SPI’s MOSO data-wire, connect to IO19 of ESP32.

SDA：I2C’s data-wire, connect to IO21 of ESP32.

SCL：Clock pin of I2C, connect to IO22 of ESP32.

BCLK：Clock pin of I2S, connect to IO14 of ESP32.

MCLK：Clock pin of I2S, connect to IO12 of ESP32.

DO：DO data-wire of I2S, connect to IO4 of ESP32.

DI：DI data-wire of I2S, connect to IO16 of ESP32.

LRCK：LRCK data-wire of I2S, connect to IO17 of ESP32.

RST：Low level reset port.

For master control board of the FireBeetle, we have reserved external DC ports for more

complex projects, supporting other peripheral chargers such as wireless charging module and

solar charging module.

Caution: + should be connected to the positive pole of the external charger;

- should be connected to the negative pole of the external charger.

The input voltage is from 4.7V to 6V.

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Chapter2: Quick-start

FireBeetle Board-ESP32 Hardware

In the Chapter1, we have introduced pins and corresponding peripheral default profiles of Arduino

IDE. Please refer to the Chapter1 if you have any enquiry related to the special provision of pins.

Characteristics

Working voltage: 3.3V

Input voltage: 3.3V~5V

Support electric current of low power consumption: 10 μA

Support maximum discharge current: 600mA

Support maximum charge current: 500mA

Support USB charging.

Processer: Tensilica LX6 dual core processer (One for high speed connection; one for

independent programing).

Frequency: 240MHz

SRAM：520KB

Flash：16Mbit

Wi-Fi standard：FCC/CE/TELEC/KCC

Wi-Fi protocol: 802.11 b/g/n/d/e/I/k/r (802.11n, high speed can reach to 150 Mbps),

converge A-MPDU and A-MSDU, supporting 0.4us protecting interval.

Frequency range: 2.4~2.5 GHz

Bluetooth protocol: Comply with BR/EDR/BLE standard of Bluetooth v4.2.

Bluetooth audio: the current under low power consumption of CVSD and SBC is 10μA

Working current: 80mA in average

Frequency range: 2.4~2.5GHz

Support one-key downloading.

Support micropython.

On-chip clock: 40MHz crystal and 32.768 KHz crystal.

Digital I/O: 10 (default setting of arduino)

Simulative input: 5(default setting of arduino)

SPI: 1 (default setting of arduino)

I2C: 1 (default setting of arduino)

I2S: 1 (default setting of arduino)

LED_BUILTIN：D9

Interface: FireBeetle series compatible

Working temperature: -40℃~+85℃

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Dimension: 24 ×53(mm)/0.94 x 2.09(inches)

The dimension of mounting hole: inner diameter 3.1mm; outside diameter 6mm.

On-board reset bottom

Hardware vision: V1.0

FireBeetle Board-ESP32 can charged by lithium battery. The port as shown below.

Specification

FireBeetle Board-ESP32 mother board is fully compatible with FireBeetle range, the dimension

parameters of it shown as below.

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Distance from pin to pin: 2.54mm.

Distance between two mounting holes: 24mm/53mm.

Dimension of mounting hole: 3.1mm.

Dimension of motherboard: 29.00×58.00mm

Thickness of the board: 1.6mm

Arduino IDE for FireBeetle Board-ESP32

FireBeetle Board-ESP32 is easy for and on its users, even for a novice. The tutorial below present the

way to download and install Arduino IDE software, processing in Arduino IDE.

3 Basic necessities: a FireBeetle Board-ESP32, USB data wire, and a computer that runs with

Windows/Mac OS/Linux system and has network.

The FireBeetle Board-ESP32 and USB data wire that needed, as shown below.

USB data wire FireBeetle Board-ESP32

Arduino IDE for FireBeetle Board-ESP32 let your Arduino IDE support FireBeetle Board-ESP32 control

board. You can set up the development environment quickly by the instruction below.

STEP1: the way to download Arduino IDE software.

The instructions below are based on Windows operating system. It works as a reference to other

operating systems.

Firstly, please download the latest version of Arduino IDE software from the official website.

Our official website: http://arduino.cc/en/Main/Software

Download link: http://arduino.cc/en/Main/Software

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Caution: as the tutorial used Arduino IDE 1.8.0, please use Arduino 1.8.0 or later ones for the best

experience.

Please choose the corresponding installation package from the list to the right of the download

page. Windows system users can choose either Windows installer or Windows ZIP to download.

Nonetheless Windows installer is better for freshman. Installing driver by hand is needed for

Windows ZIP. For Windows installer, there is no need for extra manual install drive. You can execute

installation directly and follow the Setup Wizard to accomplish the configuration. The drive will be

installed automatically after the installation.

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