Connect the tablet to the Reach

Tap a workflow card

On the Home screen, tap the big square for the job you're about to do, for example Ditching (top left). Any workflow will do: the connection stays when you change workflows later.

A window opens, for example Ditching — Connect.

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Tap Emlid Reach

It's the green button in the middle of the window. The app starts looking for your receiver.

The white Simulate button under it runs a practice simulator with no receiver at all.

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Wait a few seconds

The window says Looking for a receiver…. The app checks the tablet is on a Reach's Wi-Fi, reads the receiver, and connects.

A red message appears instead? It says what's wrong. See Connection errors.

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Check the receiver is connected

A window called System Check opens. You should see a green tick on the top row, Receiver Connected, with your receiver's model under it: Emlid Reach RS3 (or RS4).

The two rows under it spin for a second or two while the first positions come in. The green Continue button stays grey until they do.

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Wait for RTK Fixed

Watch the bottom row, GPS Accuracy. Wait until it turns green and reads RTK Fixed.

RTK Fixed is the most accurate kind of GPS position, and the only one good enough to survey and grade. It needs corrections reaching the receiver, from your base or over its SIM card. Once you're in, the GPS button at the top of the survey and grade screens shows a green RTK.

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If it stays amber, wait

Amber means the position isn't good enough yet. Continue already works, but don't survey or grade on amber.

• GPS — grading accuracy reduced: no corrections are reaching the receiver at all. Check your base is on, or the receiver's SIM and NTRIP login (RTK problems).
• FLOAT — grading accuracy reduced: corrections are arriving, but the receiver isn't fixed yet. Give it a minute, with clear sky above the receiver.

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Tap Continue

Tap the big green Continue button at the bottom of the window. The workflow's choices come next, for example New Survey or Load Survey / Design.

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Activate the receiver, the first time only

A receiver that isn't activated works as a plain GPS. You can survey with it. But when you tap Start on the Grade screen (the big green button top right), the Activate Ditch Assist Lite window opens instead of guidance.

You do this once per receiver: Activate a receiver.

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Tap Settings

It's the fourth button down the right-hand side of the screen, with a gear icon. The Settings screen opens.

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Scroll to the very bottom of Settings

Put your finger on the Settings list and slide it up. Do it again and again until the list stops moving (how to scroll).

You're at the bottom when the last white box is Dealer Code.

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Tap Emlid Diagnostics

It's the last button on the Settings screen, on its own under Dealer Code. A window called Emlid Diagnostics opens and shows Looking for a Reach on this Wi-Fi… for a moment while it reads the receiver.

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Check what it's set up as

A receiver set up for a control module shows a green line, Configured as Ditch Assist Rover. Lower down, the row Position output 1 reads serial UART 38400: its position only goes down the cable.

That's right for a cabled kit and wrong for Ditch Assist Lite.

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Tap Configure

It's the green button at the bottom right of the window, with a wrench icon. Three choices appear: Base, Rover and Lite Rover.

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Tap Lite Rover

It's the third box, at the bottom of the three: On the machine, no control module. The tablet connects straight to the receiver over its Wi-Fi hotspot (Ditch Assist Lite). Its round button fills in green.

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Check the LoRa frequency

Under the three choices is LoRa frequency (MHz). It's the radio channel your Reach base sends corrections on. It must match your base. Leave it as it is if it already does.

To change it, tap the box and type the same number your base uses.

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Tap Program receiver

It's the green button at the bottom right of the window. The app writes the new setup into the receiver and checks each part. A list grows as it goes.

It takes about 15 seconds. Don't switch the receiver off or leave the Reach's Wi-Fi while it runs. The window can't be closed until it's done.

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Check it says Lite Rover

You should see a green tick and Programmed as Ditch Assist Lite Rover. Position output 1 now reads tcpsvr :9001 NMEA: the position goes out over Wi-Fi, which is what the app connects to.

The heading near the top still says Reach RS3 · Rover. That's the receiver's own job (a rover, not a base). It's correct.

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Close the window

Tap the X in the top right corner of the window. You're back on the Settings screen.

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Tap Home

It's the top button in the column down the right-hand side, with a house icon. The Home screen opens.

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Tap your workflow

Tap the big square for the job you're about to do, for example Ditching (top left). The connect window opens.

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Tap Emlid Reach again

The green button in the middle of the window. This time there's no red message: the System Check opens. Carry on from Connect in the app, step 4.

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Tap Pre-Flight Checks

It's the orange button at the bottom of the column down the right-hand side of the screen, with a checklist icon. A window called Pre-Flight Checks opens.

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Read the top row

The top row, Controller, names your receiver. With an activated receiver it reads Emlid Reach RS3 · Lite active (or RS4) with a green tick, and the ONLINE label at the top is green.

The rows under it are explained in the table below this walkthrough. Close the window with the X in its top right corner.

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Not activated yet? Tap Activate

A receiver that isn't activated reads Emlid Reach RS3 · Not activated in amber, and ONLINE is amber too. An Activate button with a key icon sits at the bottom right. Tap it to activate the receiver now: Activate a receiver.

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Nothing connected? Tap Connect

With nothing connected, the top row reads Not connected and the label at the top says OFFLINE. Tap Connect, the green-edged button at the bottom left.

When something is connected, the same button says Change.

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Tap Emlid Reach

A window opens under the heading Connect to receiver, with two buttons. Tap the green Emlid Reach button. The app looks for the receiver for a few seconds, the same as from a workflow.

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Check the System Check, then tap Continue

The same System Check opens, with a Close button at the bottom. You should see Receiver Connected with your receiver's model. Wait for green RTK Fixed on the bottom row, then tap the green Continue button.

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