If dockets are not printing, this is caused by the following reasons:
IP address from the printer has changed since originally setting up the printer.
WIFI network is offline or it is different to the printer and iPad
Printer details are not correctly setup
Printer is out of paper.
The first items to check are:
On the printer. Check that the connection icon is illuminated "Blue" on the printer itself. If it is orange or not illuminated, check the cabling to the connection to the printer end, and the router end. If it's not illuminated, this means there is no network connection.
On the Host merchant app. Check the printer configuration by going to the Settings section, then to the Printing Settings. Check that the respective printer settings are correct by clicking the printer, then double checking the:
IP address is correct
The printer model is the correct model
That the Menu categories that you want printed are all selected respectively.
Click Save then try the Test Print. When the test print button is pressed, a small ticket will print proving the connection is successful.
If that doesn't work, or unsure how to check the IP address of your printer, either turn the printer OFF then ON again and check the initial printed slip for the IP address. Note: some Epson thermal printer models need you to use the end of a pen and depress a small reset hole underneath the printer.
If you're still having issues, make sure the iPad is on the same WiFi network and hasn't switched to a data sim 4G mode. The iPad must be on the same network as the printer in order to send it the printing information.
Note: The Host Merchant app must be open to activate the automatic printing function. If the app is minimised and an order is placed, then the automatic docket print will not have been triggered.
If dockets are still not printing, delete the printer and try adding it as a new printer.