Esp8266 - esp easy

[affinite]

Thanks for taking the time to reply guys
In answer to your questions ...

I'm trying to establish a link directly between the ESP8266 and SignalK using UDP without using NodeRed
(I only showed the NodeRed screen shot because I wanted to show what data appears to be present on port 55557.)
I know that I've used incorrect SignalK keys but I simply wanted to establish a data flow first and tidy-up later
Similarly, I'm just sending the ESP8266's WiFi signal strength as a proof-of-concept so Im not concerned about converting it to/from Kelvin 
I will use the correct keys on any live system

I have defined the SignalK connection to port 5557 as input type "SignalK"

I've attached some screen grabs to show what ive setup in the hope that you will see where ive gone wrong.
(Actually when I enable the ESP8266 UDP controller the SignalK server seems to choke so Im obviously doing something VERY wrong)

You'll have gathered that I'm unfamiliar with JSON and UDP but by installing the SignalK-MQTT gateway I have managed to get the data into SignalK using MQTT so if I cant get UDP to work, I do have an alternative option.