In using DealPOS mobile applications, generally in printing receipts using Bluetooth / IP network printers. In this article, we will see how to configure / pair a Bluetooth printer from an Android device so that the printer can print receipts. You can check the steps below:
I. How to turn on your tablet's Bluetooth radio
Step 1. Open The Setting application on your tablet
Click on connections > Bluetooth.
Check Bluetooth to turn it on. Your tablet scans for and displays the IDs of all available Bluetooth devices in range.
If the device you want to pair with isn’t on the list, ensure that the other device is turned on and set to be discoverable. See the documentation that came with your device to learn how to make it discoverable by your tablet, and for other instructions for pairing.

Note: If your tablet stops scanning before your other device is ready, touch scan device or available devices and then scan for the device.

Step 2. Pairing your Bluetooth printer with a tablet

Before you can use a Bluetooth device, you need to connect it, which is called "Pairing" the devices. You must pair your tablet with a device before you can connect to it. Once you pair your tablet with a device, they stay paired unless you unpair them.
Check Bluetooth to turn it on. Your tablet scans for and displays the IDs of all available Bluetooth devices in range.
If the device you want to pair with isn’t on the list, ensure that the other device is turned on and set to be discoverable. See the documentation that came with your device to learn how to make it discoverable by your tablet, and for other instructions for pairing.
If your tablet stops scanning before your other device is ready, touch Scan for devices.
Touch the ID of the other device in the list in the Found list to pair them.
After Bluetooth is connected, the pairing request will be set to pair with "..." (you're another device Bluetooth) and need to be required PIN, you can use 0000 or 1234 for password and then click OK
II. Pairing Bluetooth Printer with DealPOS Mobile Apps
Step 1. Click Sign in your account DealPOS or Create an account if you don't have a DealPOS account

Step 2. Sign in your account DealPOS and fill in username and password

Step 3. After that click the left bottom menu icon

Step 4. Choose Settings And Click Bluetooth

Step 5. After That click Paired Printer - Bluetooth Printer

Step 6. If you want to test your that connected with your mobile device, you can use test printing then click the print button.

You might also read this article :
You can check the steps for pairing a Printer using an IP Network connection in this article: Setup Network Printer on Your Mobile Apps
If you want to print more than 1 copy of an invoice in 1 same transaction, you can check this article: Printing Multiple Copies for Customer Order
If you feel that your invoice print is not optimal yet, maybe you can check this article to set printing preferences: Changing Printer preferences in DealPOS