Connect RPI with Bangle and send data

Hi ,Thanks for that.
It displayed on the watch so, so far so good.
This is the shell output
Connecting...
Connected
Writing command
RX> bytearray(b"E.showMessage(\'Hello")
RX> bytearray(b"\',\'A")
RX> bytearray(b" Title\')\r\n")
Waiting for data
RX> bytearray(b'Uncaught ReferenceEr')
RX> bytearray(b'ror: "nE" is not def')
RX> bytearray(b'ined\r\n at line 1 col')
RX> bytearray(b" 36\r\n...ssage(\'Hello")
RX> bytearray(b"\',\'A Title\')/nE.show")
RX> bytearray(b"Message(\'Hello\',\'A T")
RX> bytearray(b"itle\')...\r\n ")
RX> bytearray(b' ')
RX> bytearray(b' ^\r\n>')
Done!
It doesnt look to clean. Is that down to how much data it can send?
Also do you now anything re UUIDNORDIC TX and RX?
Many Thanks