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I2C Pin Out (qwIIC from Sparkfun Electronics)

“qwIIC” (which stands for Quick Wire Inter-Integrated Circuit) from SparkFun Electronics is a convenient inter-board cable interface for connecting I2C electronic board modules together. I2C (Inter-Integrated Circuit) is a communication protocol commonly used to connect low-speed peripherals in embedded systems.

I2C pinout for qwIIC connect system from Sparkfun Electronics

The qwIIC system simplifies connecting I2C devices by providing a standardized pinout. This makes it easier to connect sensors, displays, memory modules, and other I2C-compatible components without having to worry about the specific pin configurations of each device.

Typically, the qwIIC pinout includes power (VCC and GND), clock (SCL), and data (SDA) lines, which are necessary for I2C communication. Some versions of qwIIC may also include additional pins for features like interrupt signals or voltage level shifting.

With qwIIC, you’ll spend less time figuring out pin configurations and more time creating awesome stuff. So, whether you’re a seasoned maker or just starting out, qwIIC is your trusty sidekick for hassle-free I2C interfacing.

Overall, the qwIIC pinout from SparkFun Electronics streamlines the process of connecting and interfacing with I2C devices, making it a popular choice for hobbyists, makers, and electronics enthusiasts.

The I2C cable connector from qwIIC (Sparkfun Electronics) is compatible to STEMMA QT (Adafruit). Their connector and pin out are the same.

QWIIC I2C connector details

QWIIC I2C inter-connection system uses miniature connector SH/SR series (1.0mm pitch) from JST. JST specialises in connector production. The following is the datasheet and drawing for the JST SH SR series connectors use in the QWIIC Connect System.

Cable Plug

Housing part number: SHR-04V-S-B
– Available from Digikey: 455-1379-ND

Crimp Pin part number: SSH-003T
– Available from Digikey: 455-1561-2-ND

Board Socket

– Socket part number: BM04B-SRSS-TB (Available from Digikey: 455-BM04B-SRSS-TB)
– Socket part number: SM04B-SRSS-TB (Available from Digikey: 455-SM04B-SRSS-TB)

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I2C Pin Out (Grove from Seeed Studio)

The Grove Ecosystem from Seeed Studio presents a revolutionary approach to prototyping electronic systems. It operates on a modular, standardized connector system base on I2C communication protocol, simplifying the process of introducing new electronics into the prototype design. Unlike conventional methods involving jumpers or soldering, Grove’s modular building-block strategy streamlines the process significantly.

This is the I2C pin out of a popular Grove from Seeed Studio. I2C cable is used for inter connecting the electronic circuit modules through this single data communication bus.

I2C pinout for Grove Ecosystem from Seeed Studio

The heart of the Grove system is its base unit, typically a microprocessor, facilitating seamless connections to various modules via this standardized I2C connector cables. The base unit acts as a central hub, allowing effortless integration of input and output from Grove modules. Each module serves a specific function, ranging from basic inputs like buttons to more intricate sensors like heart rate monitors. Importantly, the Grove ecosystem doesn’t mandate a base unit for module connectivity. A Grove to Pin Header Converter cable enables direct linkage from Raspberry Pi or Arduino pins to Grove connectors.

The Grove I2C cable interface enjoys compatibility with a wide range of development boards and microcontrollers, offering versatility and flexibility in project implementation.

Grove I2C connector details

Grove I2C inter-connection system uses its own proprietary connector. Known as 1125S-4P, or the A2005 series. The following is the datasheet and drawing for the Grove connectors.

Fortunately this connector can be compatible to Grove (Seeed Studio), and Gravity (DFRobot) which is base on JST PH series (2mm pitch) connector.

Cable Plug

Housing part number: PHB-4Y
Crimp Pin part number: PHB-T11

Grove 4pin assembled cable 5cm, 110990036 (Available from Digikey: 1597-1085-ND)
Grove 4pin assembled cable 20cm, 110990027 (Available from Digikey: 1597-1089-ND)
Grove 4pin assembled cable 30cm, 110990040 (Available from Digikey: 1597-1086-ND)
Grove 4pin female jumpers pack, 110990028 (Available from Digikey: 1597-1081-ND)

Board Socket

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DEX Connector Pin Out

DEX cable wiring is typically use in communication between devices that are used in a vending machine.

DEX connector pin out

DEX Technology

DEX (Digital Equipment Exchange) protocol, was originally used by bottling companies in the 1980s for managing inventory and delivery routes, has become a common standard for the vending machine business. DEX offers several benefits such as minimizing inventory investment, tracking customer habits in real time.

Here’s how DEX works: Each vending machine contains a VMC (vending machine control board) that handles transactions like coin counting and card payments. This data is then translated into DEX format for remote access by operators. DEX technology allows for the transfer of data to a computer or handheld device, enabling efficient management of inventory and generating useful reports.

The advantages of DEX usage include planning efficient routes, reducing unnecessary machine servicing, and streamlining restocking processes. This allows the vending machine operators to save time and money, improve inventory management, and enhance overall profitability.

DEX technology also involve financial accountability by automatically tracking cash flow and reporting malfunctions or repair needs. Vending machines equipped with DEX can be easily identified by checking for specific features or components inside, and older machines can be upgraded with VMC kits or replaced with newer DEX-enabled models.

DEX technology revolutionizes the vending machine industry by providing operators with valuable insights and tools to optimize their businesses. With its ongoing development, DEX continues to offer significant benefits and efficiencies for the future of vending.

Another popular and common communication standard in the vending machine industry is the MDB and also the VCCS protocol.

DEX Connector

DEX connector uses a 3 pins 6.35mm stereo jack (or also known as 1/4″ stereo plug). This jack is the same plug that is widely used on cables in the audio industry.

The tip of the jack is receiving the serial communication data, while the middle ring contact is for the transmit. The last big patch ring is common ground reference for the data signal.

Data Signal

The data signal is compatible to RS232 serial data. To convert from DEX to RS232 is a matter of wiring to the RS232 plug (D-Sub-09 connector)

DEX cable and accessories

You can get your DEX connector, DEX harnesses, DEX to RS232 cable and converter from online.

The following are some of the online places where you can get your DEX stuffs.

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