B4XGoods-B4X好物整理，每周六更新

B4RLibraryB4R sensor

rAdafruitBMP280 - BMP280 temperature & pressure sensor

This is a wrapper for Adafruit BMP280 library

@Erel · 2016-08-27

B4RTutorialB4R motor

Servo motor and Arduino

Servo motor and Arduino

@inakigarm · 2016-08-26

B4RTutorialWeather

ESP8266 + UDP + BMP180 = Simple weather station

This is an example of how UDP can be used to broadcast the current temperature and pressure to one or more clients. The nice thing about it is that there is no server involved. The ESP8266 just sends the packets to the broadcast address.

@Erel · 2016-08-22

B4RLibraryB4R sensor

BMP180 - Pressure and temperature

BMP180 - Pressure and temperature

@Erel · 2016-08-22

B4RTutorialFTP

ESP8266 FTP Client

An FTP client in B4R

@Erel · 2016-08-21

B4RLibraryDrawing

rAdafruitSSD1306 - OLED displays

This is a wrapper for this open source project: https://github.com/adafruit/Adafruit_SSD1306 It depends on rAdafruitGFX library: https://www.b4x.com/android/forum/threads/radafruitgfx.68904/ It allows drawing graphics and text on supported monochrome OLED modules.

@Erel · 2016-08-16

B4RTutorialMQTT

MQTT

MQTT

@Erel · 2016-08-07

B4RLibraryB4R LED

rAdafruitNeoPixel

Library for controlling single-wire-based LED pixels and strip.

@Erel · 2016-08-02

B4RLibraryB4R motor

rAdafruitMotorShield (V2)

This library wraps the following open source project: https://github.com/adafruit/Adafruit_Motor_Shield_V2_Library

@Erel · 2016-07-17

B4RSnippetB4R [B4R]

Simulate a TWO dimension array using a ONE dimension Array [B4R]

Simulate a TWO dimension array using a ONE dimension Array [B4R]

@Cableguy · 2016-07-10

B4RSnippetComms & Network [ESP8266]

Get Board Mac Address [ESP8266]

Get Board Mac Address [ESP8266]

@Cableguy · 2016-07-10

B4RTutorialB4R other hardware [HINT]

HC-05,06 Power supply [Hint]

The HC-x comes in two modules, a basic a basic chip and an assembled module.. please see the attached image. The power supply for the basic chip or PCB is 3.3 VDC, while the fully assembled module is powered by regular 5.0 VDC

@Beja · 2016-07-06

B4RTutorialOther [HINT]

10 methods to easily destroy your Arduino [Hint]

Some of us may already know how to do that :) http://www.rugged-circuits.com/10-ways-to-destroy-an-arduino/

@Beja · 2016-07-06

B4RTutorialComms & Network [ESP8266]

Requesting time from a server [ESP8266]

The example connects to a NIST server every minute to get the updated time. It then calculates the current time by comparing the current millis value to the previous one.

@Erel · 2016-07-05

B4RTutorialComms & Network

ESP8266 - WiFi Remote Configuration

A simpler and more powerful tool is available: https://www.b4x.com/android/forum/threads/esp-configurator-based-on-b4rserializator.81452. Allows the user to configure the ESP8266 WiFi settings (SSID and password).

@Erel · 2016-07-03

B4RTutorialButton

Touch switch

This is the same as Erel''s "Button Example" modified by Klaus. All what I did is replacing the mechanical switch with a touch switch module.

@Beja · 2016-06-25

B4RTutorialLego

Control Servo Motor connected to Arduino via Browser

This experiment moves a Little Crane arm (used some Lego parts) up and down via browser connected to a B4J websocket server. When the arm moves, the Red LED is turned on else the Green LED is on (waiting for the servo to move).

@rwblinn · 2016-06-20

B4RTutorialLego

Servo Motor controlled via IR Remote Control

An experiment to move a Little Crane arm (used some Lego parts) up and down via IR Remote Control (Key1=UP,Key2=DOWN). When the arm moves, the Red LED lights else the Green LED is on.

@rwblinn · 2016-06-17

B4RTutorialFile xfer

Arduino - PC File Transfer

In this example the Arduino board acts as a server. Clients can list the available files and can download files stored on the SD card, which is part of the Ethernet shield.

@Erel · 2016-06-08

B4RTutorialB4R clock