by POSable Support Team | January 16, 2026 5:29 pm
To take card payments on a myPOS GO 2 with POSable, first activate the GO 2 in your myPOS account. Then ask myPOS support to turn on Cash Register mode, set the reader’s connection type to USB, and plug it into your till. On a Windows till, you also choose the reader’s COM port in the till’s settings window. myPOS doesn’t need any API keys in POSable. myPOS is on by default for new POSable accounts, so just check it’s your active card provider in API Settings → Payments. myPOS is available in the UK and EU. This guide is for owners and managers setting up myPOS card payments.
Important:
POSable works with one card provider at a time, chosen in API Settings → Payments.
No API keys: myPOS doesn’t need keys or IDs in POSable.
Keep the GO 2 connected by USB and switched on while you trade.
POSable adds no markup to your card fees. Your rates are agreed directly with myPOS.
Why it matters
No double entry. The till sends the exact amount to the GO 2.
Cards even when your internet drops. The GO 2 uses its own myPOS Data SIM or Wi-Fi to authorise payments.
Refunds from the till. Full and partial card refunds go back to the customer’s card through the reader.
Setup at a glance
Step
Where
Who
1. Activate the GO 2
myPOS account → Devices → Activate your device, then on the reader
You
2. Turn on Cash Register mode
myPOS sends a software update
myPOS support (you ask them)
3. Set the connection type to USB
On the reader (F2)
You
4. Make myPOS the active provider
POSable dashboard → API Settings → Payments
You
5. Connect the GO 2 to the till
USB cable. On Windows, also set the COM port under Payment Settings in the till’s settings window (cog wheel)
You
6. Take a test sale
POSable till
You
Step-by-step setup
1. Activate your myPOS GO 2
If you don’t have a myPOS account, register at mypos.com[1] first.
Log in to your myPOS account and go to Devices → Activate your device to get an activation code.
Make sure the GO 2 is connected to the internet. Enter the code on the reader and press ACTIVATE.
The reader restarts and confirms the activation. It now appears under Devices in your myPOS account and stays linked to that account.
2. Ask myPOS to turn on Cash Register mode
Contact myPOS support and ask them to turn on Cash Register mode for your GO 2. They’ll send a software update to the reader. Keep it switched on and connected to the internet. The update installs automatically and the reader restarts.
Note: POSable can’t turn on Cash Register mode. Only myPOS can.
3. Set the connection type to USB
On the GO 2, press F2.
Choose 3: Change Connection Type, then USB.
Choose myPOS Data SIM or Wi-Fi. We recommend Data SIM because it’s more reliable.
Wait for the connection test to finish.
4. Make myPOS your active provider
In the POSable dashboard, go to API Settings → Payments and check that myPOS is the active provider. It’s on by default for new accounts, so you usually don’t need to change anything. If you’ve used another provider before, switch back to myPOS. There are no keys to enter.
5. Connect the GO 2 to the till
Android: plug the GO 2 into the tablet with a USB cable.
Windows: plug the GO 2 into the PC by USB. Then on the till, press the cog wheel at the top right to open the settings window, and choose the GO 2’s COM port under Payment Settings.
Tip: Switch the GO 2 on before you open POSable.
6. Take a test sale
Add an item and press Card. The amount is sent to the GO 2. Follow the prompts on the reader. No receipt prints unless you press Print Receipt. All receipts are printed on request only.
Taking myPOS payments
Card: the full amount is sent to the GO 2.
Split Payment: enter the cash amount first. The remaining balance is sent to the GO 2.
Offline: if the till’s internet drops but the GO 2 still has its own Data SIM or Wi-Fi signal, you can keep taking cards. Sales sync when the till is back online.
Refunding a myPOS card payment
myPOS supports full and partial refunds from any till.
On the till, press Recent Orders, or scan the barcode on the customer’s receipt.
Select the sale and refund the whole sale or part of it.
Before you confirm, choose Return to Stock, Damaged or Lost for the items. The refund can’t go through until you choose. Stock is only added back with Return to Stock.
A manager or assistant manager authorises the refund with their PIN.
The refund goes back to the customer’s card through the GO 2.
Split payments are refunded by the method used, up to the amount paid that way. For example, if a £15 sale was paid £10 cash and £5 card, no more than £5 can go back to the card.
No refund receipt prints automatically. Print one on request. See How to refund a sale on the POSable till.
Troubleshooting
“Transaction not completed”
Security certificates downloading: let it finish. It ends with AUTH NOT REQUIRED.
Not in Cash Register mode: ask myPOS support to turn it on (step 2).
USB unplugged: log out of POSable, reconnect the reader, then sign in again.
“myPOS not connected” or “unavailable”
Make sure the GO 2 was switched on before you opened POSable. If it wasn’t, turn it on, then log out and sign in again.
Windows: check the COM port under Payment Settings in the till’s settings window (cog wheel).
myPOS security checks can block a reader. Contact myPOS support, because POSable can’t see or change myPOS account settings.
Card payments don’t go to the GO 2
Check myPOS is the active provider in API Settings → Payments.
POSable: Email everythingis@posable.co.uk[2] or call +44 7356 055601. Support is included in every plan.
Frequently asked questions
Does myPOS need API keys in POSable?
No. myPOS is available in the UK and EU and is on by default for new accounts. Just check it’s your active provider in API Settings → Payments. There are no keys or IDs to enter.
How do I turn on Cash Register mode on the myPOS GO 2?
Contact myPOS support. They send a software update to your GO 2, which installs automatically and restarts the reader.
How does the myPOS GO 2 connect to the till?
By USB. On the reader, press F2, choose 3: Change Connection Type, then USB. On a Windows till, also choose the GO 2’s COM port in the settings window under Payment Settings.
Can I take myPOS card payments offline?
Yes, if the GO 2 still has its own signal through its myPOS Data SIM or Wi-Fi. Sales sync when the till is back online.
Can I refund a myPOS card payment from the till?
Yes, full or partial. Open the sale from Recent Orders or scan the receipt barcode, choose Return to Stock, Damaged or Lost, then a manager or assistant manager enters their PIN.
Does POSable charge a fee on myPOS payments?
No. POSable adds no markup to card fees. Your rates are agreed directly with myPOS.
Related Guides
Cash and card payments[3]. Card, Cash and Split Payment at a glance.
How to take a sale on the POSable till[4]. the full sale flow.
Does POSable work offline?[5]. myPOS cards offline with the Data SIM.
Which card terminals are supported?[6]. comparing myPOS, Dojo, Teya and Gravity.
POSable till settings, Sync and staff sign-in[7]. the settings window and Payment Settings.