SimpleJson: no plots


issue: No plots on the timeserial panel.

[1] Grafana successfully with simplejson as datasource plugin.
[2] i am sending only single variable/data point with unixtimestamp.
[3] i see time updating in the time series panel but not the datapoint. I see that i am sticking to the format mentioned in the simplejson documentation.
[4] Following is the inspection of data and the received data.

[5] Meanwhile, i am sending just only one point per 5 seconds. its a simple integer value.
[6] 1 update, if i use gauge, it shows the value every 5 seconds. In other words, the httpserver and the grafana are interacting.

plz check and let me know if any wrong in the data part.