Kereskedelmi, irodai és ipari

Description
●ESP32-S is an ultra-small multi-function radio frequency group. The dual-core 
   ESP32 is used as the main control, and the module is equipped with PCB 
   on-board antenna and IPEX base antenna, which can be used according to the 
   needs of the scene.
●It uses ESP32 to integrate WiFi, traditional Bluetooth and Bluetooth Low Energy 
   (BLE Beacon),with two high-performance 32-bit LX6CPUs, a 7-stage pipeline 
   architecture, and a main frequency range of 80MHz to 240MH. On-chip sensors: 
   Hall sensors, temperature sensors, capacitive touch sensors.
●It is fully compliant with WiFi 802.11b/g/n/e/i and Bluetooth 4.2 standards. It 
   can be used as a master mode to build an independent network controller, or it 
   can be used as a slave to run on other host MCUs, adding networking functions 
   to existing devices.
●The module integrates a PCB on-board antenna and a U.FL socket selected by 
   a 0Ω resistor, and the on-board PCB antenna is used by default.
Parameter
Module modelv

ESP32-S
Encapsulation

SMD-38
Size

18.0*25.8*2.8（±0.2）mm
SPI Flash

Default 32Mbit
Bluetooth

Bluetooth 4.2 BR/EDR and BLE
WiFi

802.11b/g/n/e/i
Support interface

UART/SPI/SDIO/I2C/PWM/I2S/IR/ADC/DAC
IO port

22
On-chip sensor

Hall sensor\temperature sensor\capacitive touch sensor
Serial port rate

Default 115200bps
Spectrum range

2412~2484MHz
Antenna

Onboard PCB antenna and IPEX antenna base
Transmitting power

802.11b: 17±2 dBm(@11Mbps)
802.11g: 14±2 dBm(@54Mbps)
802.11n: 13±2 dBm(@HT20,MCS7)
Receiving sensitivity

CCK,1Mbps:-90dBm
CCK,11Mbps:-85dBm
6Mbps(1/2 BPSK):-88dBm
54 Mbps(3/4 64-QAM):-70dBm
MCS7(65Mbps,72.2Mbps):-67dBm
Power consumption

300mA@3.3V
Safety

WEP/WPA2/WPA2-Enterprise/WPS
Power supply range

3.0V~3.6V,
Operating temperature

-20℃~ 85℃
Storage environment

-40℃~ 90℃，<90％RH
Weight

1.5g

Hardware Specifications

Chipset

ESPRESSIF-ESP32-WROVER 240MHz Xtensa®single-/
dual-core32-bit LX6 microprocessor
FLASH

QSPI flash/SRAM, up to 32MB
SRAM

520 kB SRAM
KEY

Reset,BOOT
Switch

BAT switch
Power indicator lamp

Red
USB to TTL

CP2104
Modular interface

SDcard、UART、SPI、SDIO、I2C、LEDPWM、TVPWM、I2S、IRGPIO、capacitortouchsensor、ADC、DACLNA pre-amplifier
On-board clock

40MHz crystal oscillator
Working voltage

2.3V-3.6V
Working current

about 40mA
Sleepcurrent

1mA
Working temperature range

-40℃ ~ 85℃
Size

91.10mm*32.75mm*19.90mm
Power Supply Specifications

Oversupply

USB5V/1A
Charging current

1000mA
Battery

3.7V lithium battery
Wi-Fi

Description
Standard

FCC/CE/TELEC/KCC/SRRC/NCC
Protocol

802.11b/g/n/e/i(802.11n speed up to150Mbps)
A-MPDU and A-MSDU polymerization，support
0.4μSProtectioninterval
Frequency range

2.4GHz~2.5GHz(2400M~2483.5M)
Transmit Power

22dBm
communication distance

300m
Bluetooth

Description
protocol

meet Bluetooth v4.2BR/EDR and BLE standard
Radiofrequency

with -98dBm sensitivity NZIF receiver Class-1,Class-2 & Class-3 emitter AFH
Audio frequency

CVSD & SBC audio frequency
Software specification

Description
WiFi Mode

Station/SoftAP/SoftAP Station/P2P
Security mechanism

WPA/WPA2/WPA2-Enterprise/WPS
Encryption Type

AES/RSA/ECC/SHA
Firmware upgrade

UART download/OTA
（Through network/host to download and write firm ware）
Software Development

Support cloud server development/SDK for user fir mware development
networking protocol

IPv4、IPv6、SSL、TCP/UDP/HTTP/FTP/MQTT
User Configuration

AT Instruction set,cloudserver,android/iOSapp
OS

FreeRTOS
Shipping  list

1*18650 Battery ESP32 WROVER Development Board
2*Pin

USB HUB four-way isolation module
Driver-free, support hot-swappable, plug-and-play
The USB four-way isolation module adopts AD's proprietary iCoupler zone technology, is compatible with USB2.0, provides fully isolated 1.5Mbps and 12Mbps data rates, isolates 1500V voltage, does not require an external power supply, and does not require a driver. It protects the USB port from external strong power supply and strong signal interference, and protects the computer's USB port and computer motherboard.
Function parameter
Compatible with USB2.0
Power module isolation voltage: 1500V
ADUM3160 isolation voltage: 2500V
Output power BO505S power is 1W
Power supply: from the USB port of the host computer
Use environment: -40℃~ 85℃
Support USB control transmission, batch transmission, interrupt transmission, synchronous/isochronous transmission
Support USB low-speed 1.5Mbps and full-speed 12Mbps, does not support pure high-speed devices
①USB input port
②ADUM isolation chip
③USB HUB chip
④USB dedicated ESD
⑤Four USB indicator lights
⑥BO505S isolated power supply
⑦ External power supply interface DC5V
⑧Four USB output ports

USB HUB four-way isolation module
Driver-free, support hot-swappable, plug-and-play
The USB four-way isolation module adopts AD's proprietary iCoupler zone technology, is compatible with USB2.0, provides fully isolated 1.5Mbps and 12Mbps data rates, isolates 1500V voltage, does not require an external power supply, and does not require a driver. It protects the USB port from external strong power supply and strong signal interference, and protects the computer's USB port and computer motherboard.
Function parameter
Compatible with USB2.0
Power module isolation voltage: 1500V
ADUM3160 isolation voltage: 2500V
Output power BO505S power is 1W
Power supply: from the USB port of the host computer
Use environment: -40℃~ 85℃
Support USB control transmission, batch transmission, interrupt transmission, synchronous/isochronous transmission
Support USB low-speed 1.5Mbps and full-speed 12Mbps, does not support pure high-speed devices
①USB input port
②ADUM isolation chip
③USB HUB chip
④USB dedicated ESD
⑤Four USB indicator lights
⑥BO505S isolated power supply
⑦ External power supply interface DC5V
⑧Four USB output ports

Main Feature
1.Creative products, RF-Nano-Board: Keywish Upgraded nano board for arduino, The main chip is ATMEGA328P-MU QFN32,the latest bootloader (Arduino IDE 1.8.8) was burned down. It is fully compatible with the common nano board. RF-Nano-Board is PIN-PIN with Arduino Nano V3.0,and share the same codes.
2.More convenient for application: Emakefun RF-Nano-Board integrates a NRF24L01  module with arduino nano v3.0 board, which is very convenient for 2.4G wireless connect application.
3.High quality material and Technology: We used high quality PCB original material and Immersion Gold Technology to make sure every board has smooth edge and more reliable.
4.Super small volume design, more convenient to use: The PCB size is only 48mm*19mm, the pin is fully compatible with Nano V3.0,No Soldering needed. The micro usb port is more convenient to use.
5.Complete Information reference: Keywish RF-Nano-Board using CH340 chip to UART, you can download mac, windows, linux three system drivers, data sheets and schematics and other informations from https://github.com/keywish/keywish-nano-plus/tree/master/RF-Nano, we provide quick and free support.
Specification:
Microcontroller ATmega328P
Nrf24L01  2.4G wireless
Architecture AVR
Operating Voltage 5 V
Flash Memory 32 KB of which 2 KB used by bootloader
SRAM 2 KB
Clock Speed 16 MHz
Analog I/O Pins 8
EEPROM 1 KB
DC Current per I/O Pins 40 mA (I/O Pins)
Input Voltage 7-12 V
Digital I/O Pins 22
PWM Output 6
Power Consumption 19 mA
PCB Size 48 x 18mm
Weight 7 g
Package including: 
Keywish Nano x1 
Note: Please use Arduino IDE 1.8.6 or higher version, First, install the CH340 driver,then follow this selection path in Arduino IDE：Tools -  Board“Arduino Nano” Processor “ATmega328P",
otherwise you'll find that you can't burn any program. Please refer to our github link,it can help you to slove any problem. 

Hight Quality Raspberry Pi Zero Camera Module 5MP Camera Webcam for Raspberry Pi Zero W
Note: This camera can't be installed in the raspberry pi zero official case
Feature:
Name:Raspberry Pi Zero Camera
Support :Raspberry Pi Zero V1.3 only
5MP OV5647 sensor
2592 × 1944 still picture resolution
Support 1080p30, 720p60 and 640x480p60/90 video record
Dimension: 60mm × 11.5mm × 5mm
 
Camera Specifications:
CCD size : 1/4inch
Field of View : 65-75 degree
Best resolution : 1080p

MPU-9250 module (three-axis gyroscope three-axis acceleration three-axis magnetic field)
Product model: GY-9250
Use chip: MPU-9250
Gyroscope range: ±250 500 1000 2000°/s
Acceleration range: ±2±4±8±16g
Magnetic field range: ±4800uT
Power supply: 3-5v (internal low dropout voltage regulator)
Communication method: standard IIC/SPI communication protocol (chip built-in 16bit AD converter, 16-bit data output)
Pin spacing: 2.54mm
Product size: 15mm*25mm adopts heavy gold PCB, machine welding process to ensure quality
MPU-6500 module (three-axis gyroscope three-axis acceleration)
Module model: GY-6500
Use chip: MPU-6500
Power supply: 3-5v (internal low dropout voltage regulator)
Communication method: standard IIC/SPI communication protocol
Chip built-in 16bit AD converter, 16-bit data output
Gyroscope range: ±250 500 1000 2000 °/s
Acceleration range: ±2±4±8±16g
Using Immersion Gold PCB, machine welding process to ensure quality
Pin pitch 2.54mm
Module size 15mm*25mm

MPU-9250 module (three-axis gyroscope three-axis acceleration three-axis magnetic field)
Product model: GY-9250
Use chip: MPU-9250
Gyroscope range: ±250 500 1000 2000°/s
Acceleration range: ±2±4±8±16g
Magnetic field range: ±4800uT
Power supply: 3-5v (internal low dropout voltage regulator)
Communication method: standard IIC/SPI communication protocol (chip built-in 16bit AD converter, 16-bit data output)
Pin spacing: 2.54mm
Product size: 15mm*25mm adopts heavy gold PCB, machine welding process to ensure quality
MPU-6500 module (three-axis gyroscope three-axis acceleration)
Module model: GY-6500
Use chip: MPU-6500
Power supply: 3-5v (internal low dropout voltage regulator)
Communication method: standard IIC/SPI communication protocol
Chip built-in 16bit AD converter, 16-bit data output
Gyroscope range: ±250 500 1000 2000 °/s
Acceleration range: ±2±4±8±16g
Using Immersion Gold PCB, machine welding process to ensure quality
Pin pitch 2.54mm
Module size 15mm*25mm

The UNO is the best board to get started with electronics coding. If this is your first experience tinkering with the platform, the is the most robust board you can start playing with. The UNO is the most-used and documented board of the whole Arduino Genuino family. Arduino official agent
Technical Parameters
Microcontroller

ATmega328P
Operating Voltage

5V
Input Voltage(recommended)

7~12V
Input Voltage(limit)

6~20V
Digital I/O Pins

14(of which 6 provide PWM output)
PWM Digital I/O Pins

6
Analog Input Pins

6
DC Current per I/O Pin

20mA
DC Current for 3.3V Pin

50mA
Flash Memory

32KB(ATmega328P) of which 0.5KB used by  the bootloader
SRAM

2KB(ATmega328P)
DDPROM

1KB(ATmega328P)
Clock Speed

16MHz
LED-BUILTIN

13
Length

68.6mm
Width

53.4mm
Weight

25g

The UNO is the best board to get started with electronics coding. If this is your first experience tinkering with the platform, the is the most robust board you can start playing with. The UNO is the most-used and documented board of the whole Arduino Genuino family. Arduino official agent
Technical Parameters
Microcontroller

ATmega328P
Operating Voltage

5V
Input Voltage(recommended)

7~12V
Input Voltage(limit)

6~20V
Digital I/O Pins

14(of which 6 provide PWM output)
PWM Digital I/O Pins

6
Analog Input Pins

6
DC Current per I/O Pin

20mA
DC Current for 3.3V Pin

50mA
Flash Memory

32KB(ATmega328P) of which 0.5KB used by  the bootloader
SRAM

2KB(ATmega328P)
DDPROM

1KB(ATmega328P)
Clock Speed

16MHz
LED-BUILTIN

13
Length

68.6mm
Width

53.4mm
Weight

25g

This fixture does not contain the ESP8266 module. This board is suitable for the firmware burning test of modules such as ESP-12S/12F/12E/07S/07/01/01S.
All IO ports have been led out and can be used as the smallest system development board or fixture for small batch programming. The board supports one-click firmware download function, and adds burning
Mode indicator (blue light) and serial communication indicator (green light).

Description:
1. 9 axis module (3 axis gyroscope 3 accelerometer 3 axis magnetic field)
2. Immersion Gold PCB process
3. Chip: ITG3205 ADXL345 HMC5883L
4.Power Supply:3-5v
5.Communication: IIC communication protocol
(fully compatible with the 3-5v System, circuit LLC is contained )
6.Size: 2.2cm * 1.7cm

Overview
ESP32-DevKitC V4 is a small-sized ESP32-based development board produced byEspressif. Most of the I/O pins are broken out to the pin headers on both sides for easy interfacing. Developers can either connect peripherals with jumper wires or mount ESP32-DevKitC V4 on a breadboard.
To cover a wide range of user requirements, the following versions of ESP32-DevKitC V4 are available:
different ESP32 modules
ESP32-WROOM-32E
ESP32-WROOM-32UE
ESP32-WROOM-32D
ESP32-WROOM-32U
ESP32-SOLO-1
ESP32-WROVER-E
ESP32-WROVER-IE
male or female pin headers.
For details please refer toEspressif Product Ordering Information.

Overview
ESP32-DevKitC V4 is a small-sized ESP32-based development board produced byEspressif. Most of the I/O pins are broken out to the pin headers on both sides for easy interfacing. Developers can either connect peripherals with jumper wires or mount ESP32-DevKitC V4 on a breadboard.
To cover a wide range of user requirements, the following versions of ESP32-DevKitC V4 are available:
different ESP32 modules
ESP32-WROOM-32E
ESP32-WROOM-32UE
ESP32-WROOM-32D
ESP32-WROOM-32U
ESP32-SOLO-1
ESP32-WROVER-E
ESP32-WROVER-IE
male or female pin headers.
For details please refer toEspressif Product Ordering Information.

Overview
ESP32-DevKitC V4 is a small-sized ESP32-based development board produced byEspressif. Most of the I/O pins are broken out to the pin headers on both sides for easy interfacing. Developers can either connect peripherals with jumper wires or mount ESP32-DevKitC V4 on a breadboard.
To cover a wide range of user requirements, the following versions of ESP32-DevKitC V4 are available:
different ESP32 modules
ESP32-WROOM-32E
ESP32-WROOM-32UE
ESP32-WROOM-32D
ESP32-WROOM-32U
ESP32-SOLO-1
ESP32-WROVER-E
ESP32-WROVER-IE
male or female pin headers.
For details please refer toEspressif Product Ordering Information.

Overview
ESP32-DevKitC V4 is a small-sized ESP32-based development board produced byEspressif. Most of the I/O pins are broken out to the pin headers on both sides for easy interfacing. Developers can either connect peripherals with jumper wires or mount ESP32-DevKitC V4 on a breadboard.
To cover a wide range of user requirements, the following versions of ESP32-DevKitC V4 are available:
different ESP32 modules
ESP32-WROOM-32E
ESP32-WROOM-32UE
ESP32-WROOM-32D
ESP32-WROOM-32U
ESP32-SOLO-1
ESP32-WROVER-E
ESP32-WROVER-IE
male or female pin headers.
For details please refer toEspressif Product Ordering Information.

Overview
ESP32-DevKitC V4 is a small-sized ESP32-based development board produced byEspressif. Most of the I/O pins are broken out to the pin headers on both sides for easy interfacing. Developers can either connect peripherals with jumper wires or mount ESP32-DevKitC V4 on a breadboard.
To cover a wide range of user requirements, the following versions of ESP32-DevKitC V4 are available:
different ESP32 modules
ESP32-WROOM-32E
ESP32-WROOM-32UE
ESP32-WROOM-32D
ESP32-WROOM-32U
ESP32-SOLO-1
ESP32-WROVER-E
ESP32-WROVER-IE
male or female pin headers.
For details please refer toEspressif Product Ordering Information.

Product Introduction
TDS (Total Dissolved Solids), the total amount of dissolved solids, indicates how many milligrams of dissolved solids are dissolved in 1 liter of water. Generally speaking, the higher the TDS value, the more dissolved substances contained in the water, and the less clean the water will be. Although TDS cannot effectively reflect the water quality under certain circumstances, as a parameter that can be quickly detected, TDS can still be used as an effective water quality reflecting parameter as a reference.
The commonly used TDS testing equipment is a TDS pen. Although it is cheap and easy to use, it cannot transmit data to the control system for long-term online monitoring and water quality analysis. Using special instruments, although it can transmit data, the accuracy is also high, and the price is very expensive. To this end, we specially introduced this TDS sensor module. The module is plug-and-play, simple and convenient to use. The excitation source for measurement uses AC signals, which can effectively prevent head polarization, extend the life of the probe, and increase the stability of the output signal. The TD probe is a waterproof probe that can be immersed in water for long-term measurement. The product can be applied to water quality testing in the fields of domestic water, hydroponics, etc. With this sensor, you can easily DIY a set of TDS detector to easily detect the cleanliness of the water and check your water quality.
Product parameter
Power supply voltage: 3.3~5.0V
Working current: 36mA
Output signal range: 0~2.3V
TDS measurement range: 0~1000ppm
TDS measurement accuracy: ±5% F.S. (25C)
TDS probe interface: 2 Pin XH-2.54
Temperature sensor interface: 3 Pin XH-.2.54
Signal output: 0~2.3V analog signal output, compatible with 5V and 3.3V control systems. Excitation source is AC signal, effectively preventing probe polarization
Waterproof: Waterproof probe can be immersed in water for long-term measurement
TDS probe parameters:
TDS probe is suitable for 2 points of PE tube
Module size: 42mm×31.2mm
Parameter index

Parameter value
Insulation resistance between two poles

≥50M ohm (when not in contact with water)
Detect medium temperature

≤70℃
Recommended working voltage

≤5.0V (refers to the voltage clamped between two probes)
Recommended working current

≤50uA (the smaller the current, the longer the life of the probe)
Line length

58CM

VI5300 module parameters:
Voltage: 3.3-5v
Communication interface: I2C
Size: 25x10.7x3.2mm
Distance: 3cm-4m
Ranging parameters:
--Distance:>4m
--Ranging frequency: >60Hz
--Measurement accuracy: ±4%
--Distance and confidence feedback
Use
ØMobile robot (fast ranging and obstacle detection, patrol wall walking)
ØUser detection (personal computer/notebook and other equipment user detection wake up, switch machine)
ØUnmanned aerial vehicle (landing assistance, hovering, ceiling detection)
ØSmart buildings and lighting equipment (come detection, 1D gesture recognition)
ØCamera (low-light autofocus assist, video focus tracking help)

VI5300 module parameters:
Voltage: 3.3-5v
Communication interface: I2C
Size: 25x10.7x3.2mm
Distance: 3cm-4m
Ranging parameters:
--Distance:>4m
--Ranging frequency: >60Hz
--Measurement accuracy: ±4%
--Distance and confidence feedback
Use
ØMobile robot (fast ranging and obstacle detection, patrol wall walking)
ØUser detection (personal computer/notebook and other equipment user detection wake up, switch machine)
ØUnmanned aerial vehicle (landing assistance, hovering, ceiling detection)
ØSmart buildings and lighting equipment (come detection, 1D gesture recognition)
ØCamera (low-light autofocus assist, video focus tracking help)

Note: This protection board cannot be used for iron-ion polymer batteries, hand drill battery packs, electric fish machine battery packs, electric bicycle battery packs, 2 pieces in series with 24V, motors above 775 (4A), 1W fisheye LED lights, Please pay attention to customers who purchase the above combination! .
The power range described is applicable to the following products:
Massager battery pack, LED lamp backup power supply, 12V electronic products, solar street lamp battery pack, monitoring backup power supply, and other products.
Note: For products with a current above 3A, the battery discharge rate must be above 3C.
The magnification calculation formula: For a battery with a 1C magnification, the 2000 capacity is equal to 2AH*1=2A upper limit working current.
3C rate battery, 2000 capacity is equal to 2AH*3=6A upper limit working current.
In use, the battery will heat up, which means that the battery rate is not applicable. In this case, it must not be used for a long time, and the battery will be damaged quickly.
Note 1: Wiring 0V (B-), 3.7V (B1), 7.4V (B2), 11.1V (B ) strictly according to the diagram, do not intentionally short-circuit!
Note 2: After the line is connected, it needs to be charged before output.
Note 3: When connecting 3 sets of batteries in series, please ensure that the voltage of each set of batteries is the same. If they are not the same, please charge each set of batteries separately and use them in series. During the discharge test, the voltage drops. The fast battery is the poor battery.
Explain for some customers with poor electronic foundation: Never mix good batteries and bad batteries together! The closer the capacity/internal resistance of the 3 sets of batteries, the better! (2 good batteries 1 poor battery use effect = 3 poor battery usage effects).
The attributes of the lithium battery protection board:
Model: HX-3S-FL10-A
Overcharge voltage range: 4.25~4.35V (±0.05V)
Over-discharge voltage range: 2.3~3.0V (±0.05V)
Working current: 0~8A
Instantaneous current: 11~13A
Quiescent current: less than 30uA
Internal resistance: less than 100mΩ
Working temperature: -40~ 50℃
Storage conditions: -40~ 80℃
Effective life: more than 30000 hours
Short circuit protection: can be protected, delayed self-recovery.
The protection board size and device description:
The size is 53*17*4.0mm; the components are 2110-CB protection chip and AOD472*2.

Description
10DOF modules (three-axis gyroscope triaxial accelerometer three-axis magnetic field Pressure)
Immersion Gold PCB process
Using the chip: MPU6050 HMC5883L BMP180
Power supply :3~5v
Means of communication: IIC communication protocol (fully compatible with 3~5v system containing LLC circuit)
Size: 2.2cm * 1.7cm

Product Description:
The product uses industrial-grade chips and high-precision imported SHT20 temperature and humidity sensors to ensure the excellent reliability, high precision and interchangeability of the product. Using RS485 hardware interface (with lightning protection design), the protocol layer is compatible with the standard industrial Modbus-Rtu protocol. This product integrates the MODBUS protocol and the common protocol. The user can choose the communication protocol by himself. The common protocol has an automatic upload function (connecting RS485 and passing the serial port adjustment tool will automatically output temperature and humidity).
Product Highlights:
Industrial grade product, high progress SHT20 temperature and humidity sensor, RS485 communication;
The standard MODBUS protocol is integrated with the common protocol, and users can choose the communication protocol by themselves;
The baud rate can be set by yourself;
The common protocol has an automatic upload function, and the upload rate can be set by yourself.
Product parameters:
Working voltage: DC4-30V (the highest should not exceed 33V)
Maximum power: 0.2W
Working temperature: temperature -20℃ 60℃, humidity 0% RH-100% RH
Control accuracy: temperature ±0.3℃(25℃), humidity ±3% RH(25℃)
Output interface: RS485 communication (standard MODBUS protocol and custom common protocol), see protocol description for details
Device address: 1-247 can be set, the default is 1
Baud rate: default 9600 (users can set by themselves), 8-bit data, 1-bit stop, no parity
Size: 60*30*18mm

Product Description:
The product uses industrial-grade chips and high-precision imported SHT20 temperature and humidity sensors to ensure the excellent reliability, high precision and interchangeability of the product. Using RS485 hardware interface (with lightning protection design), the protocol layer is compatible with the standard industrial Modbus-Rtu protocol. This product integrates the MODBUS protocol and the common protocol. The user can choose the communication protocol by himself. The common protocol has an automatic upload function (connecting RS485 and passing the serial port adjustment tool will automatically output temperature and humidity).
Product Highlights:
Industrial grade product, high progress SHT20 temperature and humidity sensor, RS485 communication;
The standard MODBUS protocol is integrated with the common protocol, and users can choose the communication protocol by themselves;
The baud rate can be set by yourself;
The common protocol has an automatic upload function, and the upload rate can be set by yourself.
Product parameters:
Working voltage: DC4-30V (the highest should not exceed 33V)
Maximum power: 0.2W
Working temperature: temperature -20℃ 60℃, humidity 0% RH-100% RH
Control accuracy: temperature ±0.3℃(25℃), humidity ±3% RH(25℃)
Output interface: RS485 communication (standard MODBUS protocol and custom common protocol), see protocol description for details
Device address: 1-247 can be set, the default is 1
Baud rate: default 9600 (users can set by themselves), 8-bit data, 1-bit stop, no parity
Size: 60*30*18mm

SGP30 gas sensor module
The upgraded version adds LDO and level conversion, which can directly supply power from 1.8-5V
The old version can only be powered by 1.8V, and customers can purchase it by themselves.
SGP30 is a metal oxide gas sensor with multiple sensing elements on a single chip. It integrates 4 gas sensing elements and has a fully calibrated air quality output signal. In addition, SGP is easy to integrate and can integrate metal oxide gas sensors into mobile devices, opening up new possibilities for environmental monitoring in smart home, home appliances and IoT applications.
SGP30 module specifications
Working power supply voltage: upgraded version 1.8-5V, old version 1.62V-1.98V
Power consumption: 40MA
Dimensions: 12 mm x 12 mm x 1.6 mm
Interface type: I2C

MAX7219 is an integrated serial input/output common-cathode display driver. It connects a microprocessor and an 8-digit 7-segment digital LED display. It can also be connected to a bar graph display or 64 independent LEDs. It includes an on-chip B-type BCD encoder, multiple scan loops, segment word drivers, and an 8*8 static RAM to store each data. There is only one external register used to set the segment current of each LED.
A convenient four-wire serial interface can be connected to all general-purpose microprocessors. Each data can be addressed without rewriting all the displays when updating. MAX7219 also allows users to select encoding or not encoding for each data.
The entire device includes a 150μA low-power shutdown mode, analog, and digital brightness control, a scan limit register allowing users to display 1-8 bits of data, and a detection mode that allows all LEDs to emit light.
Only 3 IO ports can drive 1 dot matrix! No flicker during dot matrix display! Support cascading!
Module parameters:
1. A single module can drive an 8*8 common cathode matrix
2. Module working voltage: 5V
3. Module size: length 13 cm X width 6.4 cm X height 1.3 cm
4. With 32 fixing screw holes, the hole diameter is 3mm
5. Module with input and output interface, support multiple module cascade
Wiring instructions:
1. The left side of the module is the input port, and the right side is the output port.
2. When controlling a single module, you only need to connect the input port to the CPU
3. When multiple modules are cascaded, the input terminal of the first module is connected to the CPU, the output terminal is connected to the input terminal of the second module, the output terminal of the second module is connected to the input terminal of the third module, and so on. ..
Take 51 single-chip microcomputers as an example:
VCC → 5V
GND → GND
DIN → P2.2
CS → P2.1
CLK → P2.0
Shipping list:
1. MAX7219 dot matrix module four in one
2.20CM Dupont Line 5P
3. Pin header 2.54-5P

Raspberry Pi dedicated GPIO expansion interface.
Smaller size!
It's fully soldered, no more hands on your hands.
Quality packaging, foam stitch protection.

WeMos D1 LoLin32 (ESP32 development board)
. Product Description:
The ESP32 LoLin32 development board is a core development board designed by Wemos based on the ESP-32 module. It has an onboard 802.11 b/g/n/e/i 2.4 GHz Wi-Fi microcontroller and adds Bluetooth v4.2 BR/EDR And low energy Bluetooth (BLE, BT4.0, Bluetooth Smart) and all the GPIOs of ESP-32, equipped with dual-core Tensilica 32bit LX6 microprocessor, up to 240 MHz clock frequency, developers can use the breadboard for development And when debugging.
WeMos D1 LoLin32 (ESP32 development board) has power performance, RF performance, durability, versatility, features and reliability, so it is very suitable for IoT and networking projects. ESP32 Arduino Core can be installed, and programming can be done through Arduino IDE.
. The main purpose:
Develop IoT products
. Product features:
– WiFi Bluetooth 4.2 BLE
– Dual-core CPU
– Able to operate hardware IO like Arduino
. Product specifications:
Size: 57*25*14mm
Weight: 8g
Brand: Wemos
Model: LoLin32
Chip: ESP32-WROOM-32
Wifi: 802.11 b/g/n/e/i
Bluetooth: BR/EDR BLE
Working voltage: 3.3V
GPIO: 28
Digital I/O Pins: 26
Analog I/O Pins: 12
Maximum computing speed: 240Mhz
USB chip: CP2104
Storage capacity: 4MBytes
Memory: 20kBytes
Power plug: PH-2 2.0mm
Connection: Micro-USB
Official information: https://wiki.wemos.cc/products:lolin32:lolin32
. The product contains:
1 x WeMos D1 LoLin32 (ESP32 development board)

Descriptions:
STM32F051C8 core board carry a STM32F051C8 chip. The most basic circuit board MCU, including power supply module, reset circuit, download circuit, etc. Lead to all the I/O port resources. Row needle spacing of 2.54 mm, small size, suitable for access to the user's system.
Characteristics:
MCU: STM32F051C8T6
Kernel: Cortex- M0 32-bit
Storage Resource: 64K Flash, 8KB SRAM
Circumscribed Crystal Oscillator: 8MHz
Debugging Download Interface: SWD
Power supply of board: Yoton-USB DC-5V.
Board size: 33mm*53mm
Features:
(1) The SWD interface, download and debug support.
(2) The UART interface, download and communications support.
(3) The on-board ASM1117-3.3 V voltage regulator chip;
(4) The MCU pin interface, which leads to the VCC, GND and all I/O, convenient connection with various modules.
(5)The power indicator light (red LED).
(6)The green LED to light up the low-level I/O (PC13), can be used for testing;
(7) Reset button
Instructions:
This development carries an STM32F051C8T6 chip, all the pins of the chip lead to convenient for the user to expand other modules. USB Yoton port and a reset button. An A SWD interfaces convenient for the user to download and simulate.
Package includes:
1 x ARM Cortex-M0 STM32F051C8T6 STM32 Core Board

MPU9250 BMP280 module
(Three-axis gyroscope triaxial accelerometer triaxial magnetic field pressure)
Module Model: GY-91
Use chip: MPU-9250 BMP280
Power supply: 3-5v (internal low dropout regulator)
Communication: standard IIC / SPI communications protocol
-Chip 16bit AD converter, 16-bit data output
Gyroscopes range: ± 250 500 1000 2000 ° / s
Acceleration range: ± 2 ± 4 ± 8 ± 16g
Field range: ± 4800uT
Pressure range: 300-1100hPa
Using Immersion Gold PCB, machine welding process to ensure quality
2.54mm pitch
Module size 14.3mm * 20.5mm

Debug well before use, the default output is about 9V
Input voltage 4.5~8V
The output voltage is continuously adjustable 4.3~27V
(Above 4.3V and below 27V, any voltage can be output, you can adjust it yourself, adjust the boost counterclockwise)
Charging voltage 4.2V, charging current maximum 1A
The maximum discharge current is 2A, and the output current must be calculated by yourself
Output reference maximum current 5V 1.4A, 9V 0.8A, 12V 0.6A
Quiescent current is about 0.5 mA
Overcharge protection: Yes
Over-discharge protection: None (it can also be said that there is 2V cut-off boost, but the output is not blocked, the output is still 2V)
Cut-off boost 2V depending on the situation, whether to add a protection board
Size: 33*23*9mm
For example, the VIN terminal is connected to a 5V solar panel, and the BAT terminal can output 4.2V to charge a 3.7V 18650 battery.
The OUT terminal can output an adjustable voltage, you can adjust as much as you need
Can be used to charge multimeters and modified lithium batteries

1. Onboard ADXL345 digital output (support I2C/SPI), low power consumption, compact acceleration sensor;
2. Support 5V/3.3V voltage input, onboard RT9161 power chip, lower voltage drop than 1117, faster load response speed, very suitable for high-noise power supply environment;
3. The commonly used pins have been led out, and the pins are standard 100mil (2.54mm), which is convenient for dot matrix boards;
4. PCB size: 28(mm)x14(mm)
5. Test procedures and related materials after purchase
Shipping list:
ADXL345 module x 1

Features:
This wireless Transceiver module is an easy and suitable module if
you want to set up your wireless communication system at a low cost!!
It can achieve a good balance between wireless transition performance and cost!
You can easily add it with your own MCU/ARM/PIC/AVR/STM32 system!
What\'s more, this nRF24L01  module is designed with a Power amplifier and SMA antenna
This allowed you to use wireless communication up to 1000 meters! (No barrier)
Specifications:
Frequence: 2.4GHz~2.5GHz
Operating voltage: 3 ~ 3.6V
Max Current:  115mA
Multi-frequency: 125 frequency
Support up to six channels of data reception
Package contents:
1x NRF24L01 PA LNA
1x SMA Antenna

Description
ME-BME280 is a Breakout Board featuring a Bosch Sensortec ME280 Temperature, Humidity & Pressure Sensor.
The board has selectable I2C address jumper (solder link GS2), I2C pull-up resistors, 7 pin header 2.54mm, and two mounting holes 3.5mm.
Default setting of the board; single power rail Vdd=Vdd_IO (solder link GS1), pull-ups resistors (R2, R3) 10k, protocol selector resistor 0ohm (R1), decoupling capacitors 0.1uF on both power supply pins Vdd & Vdd_IO.
If you connect board to both power rails VDD_IO 1.8V and VDD 3.3Vbe sure to remove the power rail jumper GS1!
BME280 Features
- Package 2.5 mm x 2.5 mm x 0.93 mm metal lid LGA
- Digital interface I2C (up to 3.4 MHz) and SPI (3 and 4 wire, up to 10 MHz)
- Supply voltage VDD main supply voltage range: 1.71 V to 3.6 V
VDDIO interface voltage range: 1.2 V to 3.6 V
- Current consumption 1.8 uA @ 1 Hz humidity and temperature
2.8 uA @ 1 Hz pressure and temperature
3.6 uA @ 1 Hz humidity, pressure and temperature
0.1 uA in sleep mode
- Operating range -40… 85 C, 0…100 百 rel. humidity, 300…1100 hPa- Humidity sensor and pressure sensor can be independently enabled/disabled
Bosch has stepped up their game with their new BMP280 sensor, an environmental sensor with temperature, barometric pressure that is the next generation upgrade to the BMP085/BMP180/BMP183. This sensor is great for all sorts of weather sensing and can even be used in both I2C and SPI!
This precision sensor from Bosch is the best low-cost, precision sensing solution for measuring barometric pressure with ±1 hPa absolute accuraccy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with  ±1 meter accuracy
The BME280 is the next-generation of sensors from Bosch, and is the upgrade to the BMP085/BMP180/BMP183 - with a low altitude noise of 0.25m and the same fast conversion time. It has the same specifications, but can use either I2CorSPI. For simple easy wiring, go with I2C. If you want to connect a bunch of sensors without worrying about I2C address collisions, go with SPI.

Features:
★ This module uses ST's L298N as the main drive chip, which has the characteristics of strong drive capability, low heat generation and strong anti-interference ability.
★ This module can use the built-in 78M05 to work through the drive power supply, but in order to avoid damage to the voltage regulator chip, when using a drive voltage greater than 12V, please use an external 5V logic power supply.
★ This module uses large-capacity filter capacitors and freewheeling protection diodes to improve reliability.
Basic attributes
Module name

DoubleHbridgemotordrivemodule

Operating mode

H-bridge drive(dual way)
Master chip

L298N

Package style

Anti-static packaging
Logic voltage

5V

Driving voltage

5V-35V
Logic current

0mA~36mA

Drive current

2A(MAXsinglebridge)
Storage temperature

-20℃~ 135℃

Power

25W
weight

30g

Peripheral size

43*43*27mm
Precautions:
1. When your drive voltage (marked as 12V input in the above figure, the actual acceptable input range is 7-12V) is 7V-12V, you can enable the onboard 5V logic power supply. After using the onboard 5V power supply , The 5V power supply in the interface does not require input voltage, but it can lead to 5V voltage for external use. (This is a regular application!)
2. When the driving voltage is higher than 12V and less than or equal to 24V (the chip manual suggests that it can support 35V, but according to experience, it is great to support 24V with conservative application voltage!), for example, to drive a motor with a rated voltage of 18V. First, the jumper cap of the onboard 5V output enable must be removed. Then connect the 5V enable, that is, a control signal with a level of 5V, to the 5V output port. When this signal input is valid and the power supply in the motor drive module is normal, the motor drive module outputs current. Otherwise, even if the power supply is normal, there will be no current on the motor. The voltage supplies power to the internal logic circuit of the L298N. (This is an unconventional application of high voltage drive!)

High-precision 5V2A charge-discharge integrated module Type-C input compatible with 4.2V lithium battery
Basic parameters
Input voltage range: 5~5.5V
Charging cut-off voltage: (4.2V/4.35V) ±0.5%
Charging current: 2.4A±5%
Boost output voltage ripple: 100mV
Boost output current: 2A
Boost conversion efficiency: 92.5% (3.6V input, 5V2A output)
Battery end quiescent current: <30uA

SHT21 module and HTU21D module can directly replace SI7021 module with the same accuracy.
To
Temperature and humidity module
GY21-SI7021-5V temperature and humidity sensor
Module model: GY21-SHT21 GY-HTU21D
Use chip: SHT21 HTU21D
Power supply: 3-5v (with level conversion function)
Module size: 10mm*12mm
Weight: 2g
Provide ardhino test code:
To
Features
Precision Relative Humidity Sensor
± 3% RH (max), 0–80% RH
High Accuracy Temperature Sensor
±0.4 °C (max), –10 to 85 °C
0 to 100 hundred RH operating range
Up to –40 to 125 °C operating range
Wide operating voltage (1.9 to 3.6 V)
Low Power Consumption 150 μA active current
60 nA standby current
Factory-calibrated
I2C Interface
Integrated on-chip heater
3x3 mm DFN Package
Excellent long term stability
Optional factory-installed cover
Low-profile
Protection during reflow
Excludes liquids and particulates
To
To
Applications
To
To
HVAC/R
Thermostats/humidistats
Respiratory therapy
White goods
Indoor weather stations
Micro-environments/data centers
Automotive climate control and defogging
Asset and goods tracking
Mobile phones and tablets
To
To
The Si7021 I2C Humidity and Temperature Sensor is a monolithic CMOS IC
integrating humidity and temperature sensor elements, an analog-to-digital
converter, signal processing, calibration data, and an I2C Interface. The patented
use of industry-standard, low-K polymeric dielectrics for sensing humidity enables
the construction of low-power, monolithic CMOS Sensor ICs with low drift and
hysteresis, and excellent long term stability.
The humidity and temperature sensors are factory-calibrated and the calibration
data is stored in the on-chip non-volatile memory. This ensures that the sensors
are fully interchangeable, with no recalibration or software changes required.
The Si7021 is available in a 3x3 mm DFN package and is reflow solderable. It can
be used as a hardware- and software-compatible drop-in upgrade for existing RH/
temperature sensors in 3x3 mm DFN-6 packages, featuring precision sensing
over a wider range and lower power consumption. The optional factory-installed
cover offers a low profile, convenient means of protecting the sensor during
assembly (e.g., reflow soldering) and throughout the life of the product, excluding
liquids (hydrophobic/oleophobic) and particulates.
The Si7021 offers an accurate, low-power, factory-calibrated digital solution ideal
for measuring humidity, dew-point, and temperature, in applications ranging from
HVAC/R and asset tracking to industrial and consumer platforms.

Name: ADXL335module
(Three-axis accelerometer analog output)
Usingthechip: ADXL335
Power supply:3-5v
X, Y, Z output

Product Introduction
This module is a module that can convert voltage and PWM. The PWM digital signal is converted into a 0 to 10V analog signal. Adjust the output voltage by adjusting the duty cycle of the PWM. It can be used to change the signal interface of PLC or other industrial control panels. The module size is small and it is easy to apply in different places.
Product parameter
Module working voltage: DC12V-30V; (power requirements: greater than 100MA)
PWM signal receiving frequency range: 1KHZ-3KHZ;
PWM signal input level range:
The peak-to-peak value is 4.5V to 10V, and the jumper is inserted at 5V. This type of level signal is mainly aimed at conventional industrial control cards (such as MACH3 board), 5V CPU interface; peak-to-peak 12V to 24V, and the jumper is inserted at 24V. This type of level signal is mainly for the conventional PLC interface.
Conversion range: 0% -100% PWM conversion to 0-10V voltage
Allowable error: 5% .
Instructions for use
After power-on, when there is no input signal, the output is 0V, and the output is only when there is input. When powering on for the first time, it is best to do a calibration and debugging: find a signal with 50% duty cycle and connect it to PWM, GND, and the amplitude corresponds to the relative jumper. The frequency is between 1KHZ-3KHZ. Use a multimeter to measure the two ports of VOUT and GND. At this time, the meter displays about 5V. Adjust the potentiometer on the board to make the multimeter display at 5.00V. This will calibrate your pulse signal and the module's Correspondence. When the frequency changes, the corresponding relationship may shift and need to be recalibrated.
The output voltage can be adjusted by adjusting the duty cycle.
The accuracy can be controlled by adjusting the potentiometer.

For microcontrollers without an analog-to-digital converter or when you want a higher-precision ADC, the ADS1115 provides 16-bit precision at 860 samples/second over I2C. The chip can be configured as 4 single-ended input channels or two differential channels. As a nice bonus, it even includes a programmable gain amplifier, up to x16, to help boost up smaller single/differential signals to the full range. We like this ADC because it can run from 2V to 5V power/logic, can measure a large range of signals, and is super easy to use. It is a great general-purpose 16-bit converter.
The chip's fairly small so it comes on a breakout board with ferrites to keep the AVDD and AGND quiet. Interfacing is done via I2C. The address can be changed to one of four options (see the datasheet table 5) so you can have up to 4 ADS1115's connected on a single 2-wire I2C bus for 16 single-ended inputs.
WIDE SUPPLY RANGE: 2.0V to 5.5V
LOW CURRENT CONSUMPTION: Continuous Mode: Only 150μA Single-Shot Mode: Auto Shut-Down
PROGRAMMABLE DATA RATE: 8SPS to 860SPS
INTERNAL LOW-DRIFT VOLTAGE REFERENCE
INTERNAL OSCILLATOR
INTERNAL PGA
I2C INTERFACE: Pin-Selectable Addresses
FOUR SINGLE-ENDED OR TWO DIFFERENTIAL INPUTS
PROGRAMMABLE COMPARATOR
This board/chip uses I2C 7-bit addresses between 0x48-0x4B, selectable with jumpers.