As explained in https://github.com/dustcloud/smartmeshsdk/tree/develop/app/JsonServer, to blink the LED, you need to issue:
an HTTP PUT request
to URL: http://127.0.0.1:8080/api/v1/oap/{{mote}}/digital_out/INDICATOR_0
with body:
{ "value": 1 }or
{ "value": 0 }
create the following Node-RED flow:
What is the configuration of the "LED on" and "LED off" nodes?
Answer 1:
What is the code you wrote in the function node?
Answer 2:
What is the configuration of the "http request" node:
Answer 3:
verify that you can switch the LED of your mote on/off