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Yabby Edge Cellular - Getting Started

The Yabby Edge Cellular (Product code YABBY-EDGE-4G) is Digital Matter's low cost, Indoor and Outdoor asset tracker with industry-leading battery life in a small rugged IP67 housing.

The Yabby Edge scans for GNSS, WiFi and Cell Tower information when getting a location fix. It then forwards this raw data to Digital Matter's Location Engine, which resolves a position on the server. This method of cloud-based location solving provides exceptional battery life, and the ability to also located based on WiFi and Cell tower information allows a location to be obtained where a GNSS only device would fail - such as indoors or in a container stack. 

The Yabby is supplied standard with the above housing, but there are alternative housings available to suit other requirements/applications. 

Small form factor, clip together housing. Not IP rated. Great for applications like laptop bags etc where a waterproof housing is not required. Allows for easy access to the device for battery changes (not that you're likely to need one!)
IP67 Rated housing with slot for a collar, to be fitted to livestock.

Technical Information

In the Box

You'll get a compact box containing the Yabby + standard housing. The 6 housing screws will be in a small packet inside the housing.

Setting it Up

Insert the SIM Card

The Yabby Edge uses a Nano SIM card – form factor 4FF. The SIM holder is on the underside of the PCB so the device will need to be lifted out of the housing to insert the SIM.

When handling the Yabby be careful not to touch the GPS antenna, to minimize the risk of damaging the sensitive GPS amplifiers with static discharge. It is recommended to wear an anti-static wrist strap. Damage due to ESD (electrostatic discharge) is not covered under warranty. 

Slide the SIM into the holder with the keyed corner first and the SIM contacts orientated down to the main board. There is a marking on the SIM holder to indicate this.

To easily get up and running:

  • The SIM needs to be able to operate on a LTE-M or NB-IoT network
  • The SIM should not have a PIN on it, unless you use the device specific PIN.
  • The SIM should have credit or airtime

In the vast majority of cases, provided you have the right type of SIM, coverage, and the SIM is active, it should get on the network automatically. For some special cases, or if you are using a Private APN you may need to apply settings via our DM LINK configuration cable to get online (available separately)


Make sure once you're online, you should Set the Network Profile (APN and band masks) for the best performance.

Choosing a SIM card

For information on how to select the right SIM card provider and type of SIM, see SIM Providers: LTE-M/Nb-IoT + Roaming, and Setup

Insert Batteries

No Reverse Polarity Protection!

They Yabby Edge does not have any reverse polarity protection (including this in the circuitry significantly reduces battery life). So be sure to insert batteries in the correct orientation to avoid damaging the device!

Once inserted, the LED should flash continuously. If the LED does not flash, it means the unit has not yet reset. In this case, remove the batteries for a minute or two to allow any residual charge to drain, and then reinsert them. The LED will only flash for the first few minutes after first powering on the device - to help indicate it is 'alive' after this it is disabled to conserve battery.

The Yabby Edge requires 3 x AAA 1.5V batteries. For best results, we recommend Energizer Ultimate Lithium (L92) batteries. These batteries:

  • Have good temperature tolerance (-20° -> +60°C operating range)
  • Low rate of self discharge - so long shelf life.
  • Readily available at supermarkets or hardware stores, and are user replaceable.

Alkaline batteries may also be used, however use care. Alkaline batteries can often be found cheaply and easily, so are attractive. 


  • Lower cost Alkaline batteries often have very high self-discharge rates, and will be partly discharged already just from sitting on the shelf at the store!
  • Alkaline batteries often don't have the same temperate tolerance as LiFeS2 options
  • We have found some Alkaline battery types prone to early, unexpected failure (i.e. halfway through their expected capacity)

There are exceptions to the above however - high quality Alkaline batteries do exist! Just be careful in your selection

Given the high cost, complication, and loss of time involved in replacing batteries in devices - we recommend testing batteries before deployment with a battery tester prior to deployment. It is also well worth paying the extra for good quality batteries!

Check you are online

Once the batteries are inserted, the PCB LED will come on and flash. The device will do the following:

  • The device will scan for  GNSS and WiFi signals, and collects raw data.
  • The raw data is sent to the Location Engine for processing
  • Processed data from Location Engine is sent to various location providers to resolve the raw data into a position
  • The resolved position is sent to the end server

We can quickly check if the device is online using either OEM Server or the OEM Installer Page. If the "Since Connected" time is recent - we know the device has successfully got online and connected in. 

Sealing the Housing

Seal the device carefully to achieve the IP-67 rating.
It is difficult to provide an exact torque figure with which to tighten screws. This is because upon first sealing the device, the screws cut threads into the nylon glass housing. So on the first assembly, the screws may be quite stiff. If the housing is opened and then resealed, the torque required for resealing will be lower than that of the first assembly.

The key goal we are trying to achieve in sealing is firm, even pressure on the silicone seal - as this is what keeps the device water-tight and dust-proof. 

To achieve this:

  1. Ensure that the clear silicon seal is in good condition, is lying flat, and is not fouled by any plastic debris or other material.
  2. Close the housing, and gently squeeze it shut. Foam on the lid will compress against the batteries, holding them firmly in place.
  3. Tighten the 4 screws to uniform tightness - such that there is an even gap at all points along the interface between the base and lid. 
    1. It is a good idea to use a screwdriver with a torque limiting clutch, start with the screwdriver on the lowest setting, and gradually increase the torque until there is a small gap between the base and lid (no need to overtighten as you risk cracking the housing)
    2. The final torque when finished will be around 0.7Nm most of the time. (Value is a guide only)

Default Settings

It is important to understand the default settings of the device, as it will explain why and when the device will update. 

  • Device Stationary
    • Heartbeat every 12 hours (location scan + upload)
  • Device on move
    • Location scan + Upload on start of movement
    • Location scan every 3 min while on move
    • Upload every 30 min (so 10 records are uploaded at a time)
    • Location scan + upload on end of movement. 
    • Movement is recorded as starting after ~4 seconds of accelerometer activity. Movement ends after 5 min with no accelerometer activity. 

Further Resources

Battery Life

To estimate battery life, and to set up low battery alerts, see

Network Settings for Optimal Battery Life

The network registration strategy can be configured to ensure the best possible battery life. For non-roaming SIM cards, significant savings can be realised by applying the right settings. 

See Yabby Edge - Upload Settings - Early Cellular Registration Abort

Data Usage
To estimate how much data the device will use, to help in choosing a SIM plan, see How much data do DM Devices use?
An example:

A Yabby Edge was configured for 2 x Daily Heartbeats., using a Telstra NB-IoT SIM in Perth, Australia. 

Key Stats:

  • Each heartbeat is approximately 1-1.3kB
    • The variance is based upon how many Satellites/WiFi Access points are found and sent to the server, which changes. 
  • >1-2 times per month, the almanac is downloaded, which is about 5kB
  • The total data usage for the month was 74kB

So this gives us the following rough estimates for monthly data

  • 1 update per day 35-40kB/month
  • >2 updates per day ~75-80kB/month
  • 4 updates per day ~145-150kB/month
Getting a position - location scanning and the Location Engine

The device uses server side processing to resolve a location, which has some key benefits, and differences to 'traditional' GPS devices. See:


For payload documentation, contact our support team

To configure the device to send data to your server, see Forward Edge Device Data to my Endpoint (Cellular)

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