QwiicBus MidPoint - SparkFun COM-18000

Index: SPF-19393 EAN: 5904422370138
The MidPoint is a component of the QwiicBus system that allows to extend the range of the I2C communication bus. Designed by Sparkfun, the solution uses the NXP PCA9615 chip, which converts two default I2C signals (the SDA data line and the SCL clock line) into four differential signals: two for SCL and two for SDA. For signal transmission an Ethernet cable is used, which is connected to QwiicBus MidPoint via RJ-45 sockets embedded on the board. In combination with QwiicBus EndPoint it allows to transmit data at distance of about 30 meters. The Ethernet cable is not included.
QwiicBus MidPoint - SparkFun COM-18000
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Manufacturer: SparkFun

Product description: QwiicBus MidPoint - SparkFun COM-18000

The MidPoint is a component of the QwiicBus system that allows you to extend the range of the I2C communication bus. Designed by Sparkfun, it usesNXP PCA9615chip, which converts two default I2C signals (SDA data line and SCL clock line)to four differential signals: two for SCL and two for SDA. For signal transmission an Ethernet cable is used, which is connected to QwiicBus MidPoint via RJ-45 sockets embedded on the board. In combination withQwiicBus EndPointit allows to transmit data at distance of about 30 meters. TheEthernet cableis not included.


Presentation of QwiicBus system components.

QwiicBus MidPoint - rozkład elementów na płytce


QwiicBus MidPoint - layout of the components on the board.

Communication in QwiicBus

QwiicBus keeps the I2C protocol when transferring data (does not require changing to RS-485 or 1-Wire), using differential transfer. It allows convenient connection of other QwiicBus components (such asEndPoint) via Ethernet cable. QwiicBus Midpoint has a built-in LMR33630 buck regulator that allows connection of devices with higher current requirements, up to 3 A / 3.3 V.

Pinout description

Apart from two Qwiic connectors and two RJ-45 sockets, board has I2C bus pins with 2,54 mm spacing for soldering:

  • 3V3- power supply
  • GND- ground
  • SDA- data line
  • SCL- clock line

Details about board architecture and its pins can be found inuser manualprepared by manufacturer.

Application of QwiicBus system

  • Creating networks of sensors within home automation
  • Extension of the range of projects based on I2C communication
  • Due to high resistance to interference, it can be used near their sources, e.g. motors

QwiicBus MidPoint specification

  • I2C supply voltage: from 2.3 V to 5.5 V
  • Differential supply voltage range: 3.5 V to 5.5 V
  • Buck regulator LMR33630 supply voltage range : from 3.6 V to 36 V
  • Embedded IC type: PCA9615
  • Pin pattern for self-soldering: 2.54 mm
  • Maximum transmission distance using QwiicBus: up to 30 m

QwiicBus MidPoint - SparkFun COM-16988
QwiicBus MidPoint - SparkFun COM-16988.

Same-day shipping

  • Crediting the payment for the order on our account on a business day before 10:00 AM means sending the goods on the same day.
  • All packages are being delivered by GLS Group courier and covered with insurance up to 1200 EUR.
  • You will receive a link to track your package and monitor the progress of delivery as soon as it is shipped.

Terms of delivery 

GLS - zone 1

Austria, Belgium, Croatia, The Czech Republic, Denmark, Germany, Netherlands, Poland, Slovakia 

  • Delivery time: 2-4 days
  • Delivery cost: from 4.18 EUR
  • Insurance: 1200 EUR
GLS - zone 2

Bulgaria, Estonia, France, Hungary, Italy, Latvia, Lithuania, Luxembourg, Portugal, Romania, San Marino, Slovenia

  • Delivery time: 2-5 days
  • Delivery cost: from 5.35 EUR
  • Insurance: 1200 EUR
GLS - zone 3

Finland, Greece, Ireland, Spain, Sweden 

  • Delivery time: 2-7 days
  • Delivery cost: from 7.67 EUR
  • Insurance: 1200 EUR

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