SystronicsRF

Members
  • Content count

    10
  • Joined

  • Last visited

  • Days Won

    2

Everything posted by SystronicsRF

  1. SystronicsRF

    SystronicsRF

    We have given priority to the older ZigBee devices, which have either been abandoned by their suppliers, or are about to be abandoned. The more modern ZigBee devices, which are either Home Automation or Light Link, are much easier to handle. The Z-Wave technology is fundamentally easier to handle, and the standards have not changed much over the years. If you go to this page https://www.systronicsrf.com/devices, you will see that we have currently integrated with a range of devices from different suppliers, including Samsung. As we are interfacing directly with the devices, we don’t plan to integrate with any other home automation system. We are also trying to gain a better picture of the devices that are in use, so that we can prioritize the addition of more devices. If you would like to go to the https://www.systronicsrf.com website, and register, which just needs your name and email address, we will send you an email with your password, and a secure link. These will give you registered user access to the website. This includes your secure personal area. There is also a degree of commonality between products from different suppliers, because the electronics in many of them are manufactured by either Centralite or Computime. Once you have logged in, or clicked on the secure link, please click on My Profile link adjacent to the search box in the header. This will take you to your profile page. There are two buttons lower down this page. The first one takes you to a page where you can describe your use of the system. The second one takes you to a selectable list of devices, from which you can pick the devices that you use. If you would like to select, or add, your devices, then we can advise on compatibility.
  2. SystronicsRF

    SystronicsRF

    We are getting close to releasing a Beta version, and we will contact you directly by email this week with our suggestions for getting you started. Following your prompt, we have only just looked at the “Iris Shutdown” thread. It does seem that Lowes has much bigger problems than Iris within its core retail business, along with many others in the same sector. The prospect of any sale, especially one that meets the needs of existing users, also seems fairly remote. The notional benefit to any potential buyer must surely be more than offset by the implicit financial burdens and risks, and the need to commit precious management resources. This must also be very evident to Lowes. Lowes announcement may be no more than managing the expectations of existing users. A non-sale is likely to result in a gradual run-down of the business, and the eventual disappearance of the brand. Hopefully, they will try to minimise the impact on existing users, by extending support as long as possible, if only to avoid further damage to the Lowes brand.
  3. SystronicsRF

    SystronicsRF

    There is no radio interference between the network adapters when they all plugged into the USB ports of the Pi, but they are a tight fit together. It may be worth using a separate USB hub to avoid the strain that this puts on the USB connections of the Pi. We have added a section entitled “USB Hubs” to the following page, which gives more detail, including our recommendation for a suitable USB hub. https://www.systronicsrf.com/installation/hub-configuration.html
  4. SystronicsRF

    SystronicsRF

    You are correct that ZigBee and WiFi don't use the same frequencies, but it is a bit more complicated. The following diagram shows the relationships. ZigBee channels are numbered 11 through 26, because channels 1 through 10 are allocated to the sub-gigahertz band. The channel numbering for ZigBee and WiFi don't correspond. as shown in this diagram. However, you can select different channels for each ZigBee network and for each Wi|Fi network, as shown. Bluetooth is different, because it hops across all of the frequencies across the entire 2.4GHz band in a pseudo-random fashion. It has the potential to interfere with both ZigBee and WiFi. Fortunately, the transmissions on all networks are all very short pulses, so the likelihood of any interference is small. For example, an average ZigBee frame takes just over 1 millisecond to be transmitted, and they occur relatively infrequently. The relative strength of the Bluetooth signal, and its proximity to the devices, also determine the likelihood of any interference. We will cover this in more detail in a separate area within the website. Initially we had similar concerns, for now, we have been running multiple Raspberry Pi 3Bs stacked on top of one another, with multiple network adapters in each Pi, and each controlling a separate ZigBee or Z-Wave network, continuously for many months. We have never encountered any interference between these networks.
  5. SystronicsRF

    SystronicsRF

    There is no difference in terms of network performance between the XBee board and the XStick. The XBee board, in combination with the high gain antenna, enables us to monitor the RF activity at a much lower level, and with spectrum analysis software. We will be adding a separate area to the website that explains the use of the 2.4GHz band, and the results of our own testing, for anyone who might be interested. The USB XStick network adapters are much more convenient to use, because there is no wiring involved. If you are interested in using these XBee modules instead, then you can also purchase a USB adapter for them.
  6. SystronicsRF

    SystronicsRF

    The two ZigBee sticks operate at different frequencies. The 2.4GHz band is divided into 16 ZigBee channels. Each channel is 5MHz wide, and the bandwidth of a ZigBee signal is only 2MHz, so there is no overlap or conflict, even when using two adjacent ZigBee channels. WiFi also shares the 2.4GHz band. It has a bandwidth of 20MHz, so it uses up the equivalent of 4 ZigBee channels. Z-Wave operates at 908MHz, so it does not interfere with either the ZigBee or WiFi signals. The system automatically chooses the quietest channels during the installation procedure. Please bear in mind that your existing hub contains network chips and antennae for ZigBee, WiFi and Z-Wave, and they do not conflict. The Digi XSticks embody the latest technology, and have a superior performance to these older devices. For this reason alone, these sticks will have a superior RF performance to that of your existing hub, even when plugged directly into the USB ports of the Pi. The Pi can equally be placed in the same location as your existing hub, and for the same reason. You can certainly use a good quality and modern USB hub and USB cable to connect to the Pi, if that’s a more convenient arrangement for you, but there is no need in terms of the RF performance.
  7. SystronicsRF

    SystronicsRF

    Fully installed, complete with operating system, full software suite, and ample data space, it will run on much less than 4GB. We have used 8GB Class 10 SD cards for all of our testing. They retail for less than $10.00, and are probably the smallest size that it’s sensible to buy today. The Pi 3B will support 256GB. We will clarify this on our Hub Configuration page: https://www.systronicsrf.com/installation/hub-configuration.html We will add some response time / performance figures: SystronicsRF
  8. SystronicsRF

    IRIS Being shut down by Lowe's??

    We have been adding further content to the website, including more of the sections in the Applications area. More importantly, we have included a feedback facility for registered visitors, in which you can outline your use of your system, and the devices that you have. This feedback will help to guide us going forwards, so that we can better tailor the new system to existing users' needs. This facility is reached via the My Profile link, adjacent to the Login and the Search field. The entered content is retained in a secure area specific to each registered visitor, so that you can amend it over time. There is a free format text area, in which you can describe your use of your system, and add any other comments. There is also a facility for you to catalog your devices. This works in a similar way to an ecommerce website. There is a reasonable comprehensive list of devices, from which can select for inclusion in your catalog. Wishing you a happy holidays and we look forward to working with you in 2019.
  9. SystronicsRF

    IRIS Being shut down by Lowe's??

    You are absolutely correct. Two ZigBee adapters and one Z-Wave adapter (US).
  10. SystronicsRF

    IRIS Being shut down by Lowe's??

    Throughout the last 7 days we’ve been adding more content to the SystronicsRF.com website, and, as promised, we are highlighting the additions as they become available. Some changes have been made in response to visitor feedback, including improved access to the table of USB network adapters, and a description of the configuration of Raspberry Pi hub, both in the Installation area, and the addition of an applications area. Following recent questions from both registered users and forum members, we've included a new FAQs section. Further new sections include Designing Applications, Heating Applications and how we're bringing your earlier AlertMe and Iris devices back to life. We welcome your comments and questions.