IPhone 16 pro - all of a sudden getting - Security Warning The printer "EPSON ET-3850 Series" appears to be different from the previously used printer with the same name, or the connection may not be trustworthy. If this is expected, tap Continue.
I have reset wifi on printer - turned both phone and printer off and on. - still getting message.
Printer is still working fine on my macbook
iPhone 16 Pro
Without delving too deeply into to technical complexities of TLS/SSL, the warning that you see is benign.
Each time that you power-cycle your printer, it will likely automatically generate a new self-signed Certificate with which to encrypt the printing connection. Being self-signed and without a trusted-root, your iPad (and other devices) cannot validate the authenticity of the Certificate - and for this reason you will see the warning that you illustrate. Selecting Continue should allow you to click-through associated security warnings.
If you still cannot print over AirPrint, some other network issue is likely to be the cause. You may find that restart of your network components will resolve the problem. You’ll need to restart your network devices in the correct order. Assuming that you WiFi Router provides DNS services for your network, restart devices in this order - allowing time for devices to fully boot/restart prior to restarting other devices:
If you continue to have difficulties, check to see if your iPhone is using the new WiFi Private Address feature. This feature is intended to provide additional privacy and security when using “public” (untrusted) WiFi networks.
Settings > WiFi > [Your WiFi Network / SSID] - tap the “i” icon - Private Address
The Private Address feature is largely unnecessary for your home WiFi network; if enabled, Private Addressing can interfere with anticipated operation of other devices, such as AirPrint/Airplay. In such circumstances, you may need to disable this feature - and can be enabled or disabled for each individual network.
Use private Wi-Fi addresses in iOS 14, iPadOS 14, and watchOS 7 - Apple Support
Without delving too deeply into to technical complexities of TLS/SSL, the warning that you see is benign.
Each time that you power-cycle your printer, it will likely automatically generate a new self-signed Certificate with which to encrypt the printing connection. Being self-signed and without a trusted-root, your iPad (and other devices) cannot validate the authenticity of the Certificate - and for this reason you will see the warning that you illustrate. Selecting Continue should allow you to click-through associated security warnings.
If you still cannot print over AirPrint, some other network issue is likely to be the cause. You may find that restart of your network components will resolve the problem. You’ll need to restart your network devices in the correct order. Assuming that you WiFi Router provides DNS services for your network, restart devices in this order - allowing time for devices to fully boot/restart prior to restarting other devices:
If you continue to have difficulties, check to see if your iPhone is using the new WiFi Private Address feature. This feature is intended to provide additional privacy and security when using “public” (untrusted) WiFi networks.
Settings > WiFi > [Your WiFi Network / SSID] - tap the “i” icon - Private Address
The Private Address feature is largely unnecessary for your home WiFi network; if enabled, Private Addressing can interfere with anticipated operation of other devices, such as AirPrint/Airplay. In such circumstances, you may need to disable this feature - and can be enabled or disabled for each individual network.
Use private Wi-Fi addresses in iOS 14, iPadOS 14, and watchOS 7 - Apple Support
Epson ET - 3850 printing issue with iPhone 16 pro
