What is Pozyx?

Pozyx is a hardware/software solution that provides accurate positioning and motion information. We have solutions for rapid prototyping (Creator) and for permanent installations (Enterprise).

Does Pozyx work indoor and outdoors?

Pozyx uses ultra-wideband (UWB) technology. Ultra-wideband works both indoor and outdoors.

What do I need for positioning?

Positioning is always done relative to a fixed infrastructure (anchors). We have both wireless and wired anchors. Your setup always needs a minimum of 4 anchors to do positioning. Tags are placed on the objects you want to position. Creator kits require you to install our software on a Windows 10 computer or use our Python or Arduino libraries. Enterprise kits come with a pre-configured positioning server.

What are anchors? What are tags?

Pozyx positioning solutions always consist of at least two parts: anchors and tags. Anchors are modules with a fixed and known position. The anchors have the same role as satellites in GPS positioning. The tags by the same analogy can be thought of as the GPS system in your car although their exact relation varies on the used protocol (TWR/TDOA or RTDOA).

One thing that is always consistent however, is that anchors are always static (their relative position towards other anchors stays the same) and tags are dynamic. The tags’ positions are computed based on time of flight measurements between anchors (of which the position is known) and tag.

What technology does Pozyx use?

Pozyx uses ultra-wideband (UWB) technology. UWB is a technology specifically designed for transmitting information spread over a large bandwidth. This makes the signal very robust and makes UWB especially well suited for accurate positioning.

Does Pozyx interfere with Bluetooth or other RF technologies?

No. UWB technology transmits very short pulses between 3.5 GHz and 6.5 GHz. Because of the very large bandwidth the transmit power is strictly regulated and very low. UWB will always be less than the noise level of other RF technologies in the same spectrum.

What is the range of the Pozyx system?

The maximal theoretical range of the UWB signal is more than 100 m. In reality the range of the system depends on a lot of factors such as line of sight conditions (LOS) and the signal strength available on the channel. Both Creator and Enterprise setups usually require one anchor per 100 – 250 m².. Both Creator and Enterprise setups can be expanded by adding more anchors.

What is the accuracy of UWB?

The accuracy of Pozyx is 10 cm in line-of-sight (LOS) conditions. In non-line-of-sight (NLOS) conditions, the accuracy tends to vary between 10 and 30 cm, depending on the material and density that is obstructing the signal.

The accuracy is not influenced by range nor is it influenced by the number of anchors you use, though a minimum of 4 anchors is required for 2D positioning. The use of at least 6 anchors placed at varying heights is recommended for 3D positioning. More anchors will increase the range and robustness of the system in case of obstruction.

What is the update rate of Pozyx?

The update rate mostly depends on the anchor hardware. Our Creator kits support an update rate of up to 60 Hz divided by the number of tags. Our Enterprise system is built for performance and supports a total (over all tags) update rate of up to a 1000 Hz.

How many tags does a Pozyx system support?

The answer depends on whether you have Creator or Enterprise anchors. With enterprise anchors, you can use an unlimited amount of tags.

With a Creator kit, you can also easily track multiple tags at the same time. One factor to keep in mind though, is that in a Creator system, more tags means a lower update rate per tag. In the Creator kits’ wireless TWR protocol, the update rate of max 60 Hz is divided between all tags equally. For Creator setups we thus advise the use of maximum 5 tags for high update rate applications and 10 tags for low update rate applications.

Can the tag be made smaller?

The tags included in all our kits are our developer headered and headerless tags and are bankcard sized. These tags come delivered with an external 1200 mAh battery and are ideal for prototyping as they can also be powered by any power source between 3.3 V and 9 V via DC, USB or pins. Developer tags can (optionally) be shielded to an Arduino or interfaced with via USB to read out positions locally or create custom UWB packages (on bi-directional UWB protocols).

In Enterprise setups, our tag configuration software allows you to set the update rate for each individual tag and create sleep patterns based on accelerometer data. Depending on these settings, Pozyx tags in TDOA mode can last from weeks to years on a single charge. When you want to expand with smaller or custom tags, contact our sales team with your specific tag, battery and casing needs and together we will configure the mini-tag suited for your case.

Is Pozyx FCC certified?

Our Creator kits are not FCC certified. They were designed with maximum flexibility in mind. The user can change all the settings. Because certification depends on certain settings the Creator kits can not be certified. They are therefore not meant for permanent set-ups. The Enterprise system is certifiable. We will guide you through the certification process if you require non-standard UWB settings.

Is Pozyx related to Arduino?

No, but our developer tags are all designed to be able to shield unto an Arduino Uno/Mega. Both Creator and Enterprise systems have applications where Arduino can be used to develop custom solutions and integrations. However Pozyx is in no way based on Arduino and you NEVER require the use of an Arduino.

What batteries does the Pozyx system use?

The developer tags used in both the Creator and Enterprise systems come delivered with a 1200 mAh powerbank.

In Creator mode, developer tags use 180 mAh. In Enterprise mode they use between 0.1 and 10 mAh.

Creator kit tags and anchors both use about 180 mA at max update rate, regardless of voltage. You can connect a battery of 3.3 to 9 V to the DC jack, 5 V pin or micro USB port to power your Pozyx device (tag or anchor – but anchors do not have a 5 V pin).

Alternatively, you can also connect a 3.3 V battery to the VDD pin. Do NOT power Pozyx products directly on the VDD pin with over 3.3 V as this pin as well as the 3.3 V pin bypass the voltage regulator and your device will break if a voltage over 3.3 V is supplied here. When the tag is connected to an Arduino Uno board as a shield you can power the Uno board with a 5 to 12 V battery.

Enterprise anchors are powered with PoE+ and cannot be battery powered. Custom tags for Enterprise setups can last years on single charges and are built for power efficiency. Contact the sales team for more info.

What positioning techniques does Pozyx support?

Our Creator system only supports wireless TWR (two-way ranging). Our Enterprise system supports TDOA. However in addition we are also working on a high performance wired TWR, inverse TDOA, AOA, hybrids and more. Contact sales@pozyx.io if you are looking for specific information on this topic.

Does Pozyx work with Raspberry Pi?

Yes, in two ways. Pozyx developer tags connect to the raspberry pi via the included micro USB cable. On Raspberry Pi Creator setups, you can simply use our Python library to read out the tag’s position or for advanced custom development.

Another alternative in both Creator and Enterprise setups is to simply use a micro USB cable from the Raspberry Pi to power the tag and access the tag’s position via our local our cloud MQTT API.

A Raspberry Pi can also be used to customize the payload of the UWB message and custom sensor data so other data could be sent from a tag to the positioning server.

On which Arduino boards can the developer tag shield?

Pozyx developer tags are standalone hardware and do not need an Arduino to operate, nor are they based in any way on Arduino. For the majority of applications the best practice is to use our MQTT API rather than a library. However for some cases, the use of an Arduino with our Arduino library provides the ability for advanced customization. Pozyx developer tags therefore shield to the Arduino Uno and Mega, and also work on the Arduino Nano.