I've got an e-paper price tag from a friend of mine and I'd like to know if it's possible to change the display contents? On the back it says its a
Solu M from 2017, model number
ST-GM29MT1. I haven't found much information about it online, and I couldn't get it apart (without excessive force). I've seen there are transmitters on the website that sells these, but all it says is that it's a 2.4 GHz protocol. Maybe it's just something like zigbee? Also, they don't specify prices so it's probably really expensive.
Is there a way I can modify the text, preferrably without the expensive original hardware? What would be a good place to start trying?
Edit: According to this datasheet of a similar product from this manufacturer it seems it is indeed ZigBee.
Edit2: Found the exact device and it really seems to be ZigBee, but how could i test that?