Android 4.4.2 cannot connect about ble

[EddyVerbruggen]

Hi, I have no support to offer for you question, but I'm wondering if it wouldn't be easier to integrate the thermal printer manufacturer's SDK (if they have any). I'm sure that's much easier to program against than a generic Bluetooth plugin. Which printer brand is it?

[davorpeic]

Hey @EddyVerbruggen

no worries, I totally understand how support works in this cases :)

This is the thermal printer I use for testing http://www.gearbest.com/office-supplies/pp_606310.html it is a generic chinese (cheap) printer. I tried to install the test app on Redmi 4A with android 6 and it works fine, so my assumption is that connecting to this device (samsung 4.4.2) is problematic and I will drop support for it to avoid issues as connection is working on android 6.

As you already had experience with thermal printers, is there a way to send a command to connected device without listing their services first? not sure if adding new method to "print" and not to "write" would solve this issue?

[EddyVerbruggen]

Hi, I only have experience with the Star line of thermal printers for which I created a plugin based on their SDK. So that's a bit higher level than what you have to do.

I think you don't need to list services before interaction, as long as you know the appropriate UUID's.

[davorpeic]

Yeah, I was checking that plugin to use it as a guide after I connect with my device. Will try few things and will let you know if I manage to do something :)
thanks!