his_read_series returning grids with same values in all rows

[candronikos]

The code below returns different results to skyspark

points = session.read(filter_expr='sensor and id==<point_id>', limit=1)
history = session.his_read_series(points.result[0]['id'], rng="yesterday").result
for row in history.iteritems():
    print(row)

Gives the result below in the prompt:

2016-06-07 00:00:02+10:00    20.690001
2016-06-07 00:15:03+10:00    20.690001
2016-06-07 00:30:03+10:00    20.690001
2016-06-07 00:45:03+10:00    20.690001
2016-06-07 01:00:04+10:00    20.690001
2016-06-07 01:15:04+10:00    20.690001
2016-06-07 01:30:03+10:00    20.690001
2016-06-07 01:45:02+10:00    20.690001
2016-06-07 02:00:02+10:00    20.690001
2016-06-07 02:15:03+10:00    20.690001
2016-06-07 02:30:03+10:00    20.690001
2016-06-07 02:45:03+10:00    20.690001
2016-06-07 03:00:06+10:00    20.690001
2016-06-07 03:15:04+10:00    20.690001
2016-06-07 03:30:04+10:00    20.690001
2016-06-07 03:45:02+10:00    20.690001
2016-06-07 04:00:03+10:00    20.690001
2016-06-07 04:15:04+10:00    20.690001
2016-06-07 04:30:03+10:00    20.690001
2016-06-07 04:45:02+10:00    20.690001
2016-06-07 05:00:03+10:00    20.690001
2016-06-07 05:15:03+10:00    20.690001
2016-06-07 05:30:03+10:00    20.690001
2016-06-07 05:45:02+10:00    20.690001
2016-06-07 06:00:04+10:00    20.690001
2016-06-07 06:15:03+10:00    20.690001
2016-06-07 06:30:02+10:00    20.690001
2016-06-07 06:45:02+10:00    20.690001
2016-06-07 07:00:02+10:00    20.690001
2016-06-07 07:15:03+10:00    20.690001
                               ...
2016-06-07 16:30:03+10:00    20.690001
2016-06-07 16:45:02+10:00    20.690001
2016-06-07 17:00:04+10:00    20.690001
2016-06-07 17:15:03+10:00    20.690001
2016-06-07 17:30:04+10:00    20.690001
2016-06-07 17:45:05+10:00    20.690001
2016-06-07 18:00:12+10:00    20.690001
2016-06-07 18:15:14+10:00    20.690001
2016-06-07 18:30:20+10:00    20.690001
2016-06-07 18:45:02+10:00    20.690001
2016-06-07 19:00:03+10:00    20.690001
2016-06-07 19:15:03+10:00    20.690001
2016-06-07 19:30:04+10:00    20.690001
2016-06-07 19:45:03+10:00    20.690001
2016-06-07 20:00:03+10:00    20.690001
2016-06-07 20:15:05+10:00    20.690001
2016-06-07 20:30:07+10:00    20.690001
2016-06-07 20:45:03+10:00    20.690001
2016-06-07 21:00:02+10:00    20.690001
2016-06-07 21:15:04+10:00    20.690001
2016-06-07 21:30:03+10:00    20.690001
2016-06-07 21:45:03+10:00    20.690001
2016-06-07 22:00:02+10:00    20.690001
2016-06-07 22:15:04+10:00    20.690001
2016-06-07 22:30:02+10:00    20.690001
2016-06-07 22:45:03+10:00    20.690001
2016-06-07 23:00:03+10:00    20.690001
2016-06-07 23:15:03+10:00    20.690001
2016-06-07 23:30:03+10:00    20.690001
2016-06-07 23:45:03+10:00    20.690001

The skyspark grid:

    6-Jun-2016 Mon 23:45:03 AEST    20.73 °C
    7-Jun-2016 Tue 00:00:02 AEST    20.69 °C
    7-Jun-2016 Tue 00:15:03 AEST    20.64 °C
    7-Jun-2016 Tue 00:30:03 AEST    20.61 °C
    7-Jun-2016 Tue 00:45:03 AEST    20.59 °C
    7-Jun-2016 Tue 01:00:04 AEST    20.57 °C
    7-Jun-2016 Tue 01:15:04 AEST    20.54 °C
    7-Jun-2016 Tue 01:30:03 AEST    20.51 °C
    7-Jun-2016 Tue 01:45:02 AEST    20.47 °C
    7-Jun-2016 Tue 02:00:02 AEST    20.46 °C
    7-Jun-2016 Tue 02:15:03 AEST    20.44 °C
    7-Jun-2016 Tue 02:30:03 AEST    20.41 °C
    7-Jun-2016 Tue 02:45:03 AEST    20.39 °C
    7-Jun-2016 Tue 03:00:06 AEST    20.37 °C
    7-Jun-2016 Tue 03:15:04 AEST    20.37 °C
    7-Jun-2016 Tue 03:30:04 AEST    20.34 °C
    7-Jun-2016 Tue 03:45:02 AEST    20.29 °C
    7-Jun-2016 Tue 04:00:03 AEST    20.28 °C
    7-Jun-2016 Tue 04:15:04 AEST    20.25 °C
    7-Jun-2016 Tue 04:30:03 AEST    20.24 °C
    7-Jun-2016 Tue 04:45:02 AEST    20.23 °C
    7-Jun-2016 Tue 05:00:03 AEST    20.23 °C
    7-Jun-2016 Tue 05:15:03 AEST    20.2 °C
    7-Jun-2016 Tue 05:30:03 AEST    20.18 °C
    7-Jun-2016 Tue 05:45:02 AEST    20.18 °C
    7-Jun-2016 Tue 06:00:04 AEST    20.16 °C
    7-Jun-2016 Tue 06:15:03 AEST    20.16 °C
    7-Jun-2016 Tue 06:30:02 AEST    20.17 °C
    7-Jun-2016 Tue 06:45:02 AEST    20.2 °C
    7-Jun-2016 Tue 07:00:02 AEST    20.23 °C
    7-Jun-2016 Tue 07:15:03 AEST    20.24 °C
    7-Jun-2016 Tue 07:30:03 AEST    20.28 °C
    7-Jun-2016 Tue 07:45:04 AEST    20.31 °C
    7-Jun-2016 Tue 08:00:03 AEST    20.34 °C
    7-Jun-2016 Tue 08:15:03 AEST    20.28 °C
    7-Jun-2016 Tue 08:30:03 AEST    20.38 °C
    7-Jun-2016 Tue 08:45:03 AEST    20.49 °C
    7-Jun-2016 Tue 09:00:04 AEST    20.63 °C
    7-Jun-2016 Tue 09:15:02 AEST    20.78 °C
    7-Jun-2016 Tue 09:30:02 AEST    21.05 °C
    7-Jun-2016 Tue 09:45:03 AEST    20.94 °C
    7-Jun-2016 Tue 10:00:03 AEST    21.02 °C
    7-Jun-2016 Tue 10:15:05 AEST    21.12 °C
    7-Jun-2016 Tue 10:30:03 AEST    21.17 °C
    7-Jun-2016 Tue 10:45:02 AEST    21.25 °C
    7-Jun-2016 Tue 11:00:03 AEST    21.21 °C
    7-Jun-2016 Tue 11:15:03 AEST    21.24 °C
    7-Jun-2016 Tue 11:30:04 AEST    21.21 °C
    7-Jun-2016 Tue 11:45:02 AEST    21.22 °C
    7-Jun-2016 Tue 12:00:04 AEST    21.17 °C
    7-Jun-2016 Tue 12:15:03 AEST    21.14 °C
    7-Jun-2016 Tue 12:30:04 AEST    21.07 °C
    7-Jun-2016 Tue 12:45:03 AEST    21.04 °C
    7-Jun-2016 Tue 13:00:03 AEST    20.99 °C
    7-Jun-2016 Tue 13:15:03 AEST    20.98 °C
    7-Jun-2016 Tue 13:30:03 AEST    21.04 °C
    7-Jun-2016 Tue 13:45:03 AEST    21.09 °C
    7-Jun-2016 Tue 14:00:03 AEST    21.15 °C
    7-Jun-2016 Tue 14:15:03 AEST    20.59 °C
    7-Jun-2016 Tue 14:30:03 AEST    20.67 °C
    7-Jun-2016 Tue 14:45:02 AEST    20.69 °C
    7-Jun-2016 Tue 15:00:04 AEST    20.69 °C
    7-Jun-2016 Tue 15:15:03 AEST    20.66 °C
    7-Jun-2016 Tue 15:30:04 AEST    20.69 °C
    7-Jun-2016 Tue 15:45:02 AEST    20.69 °C
    7-Jun-2016 Tue 16:00:02 AEST    20.7 °C
    7-Jun-2016 Tue 16:15:02 AEST    20.66 °C
    7-Jun-2016 Tue 16:30:03 AEST    20.62 °C
    7-Jun-2016 Tue 16:45:02 AEST    20.62 °C
    7-Jun-2016 Tue 17:00:04 AEST    20.59 °C
    7-Jun-2016 Tue 17:15:03 AEST    20.54 °C
    7-Jun-2016 Tue 17:30:04 AEST    20.57 °C
    7-Jun-2016 Tue 17:45:05 AEST    20.54 °C
    7-Jun-2016 Tue 18:00:12 AEST    20.57 °C
    7-Jun-2016 Tue 18:15:14 AEST    20.66 °C
    7-Jun-2016 Tue 18:30:20 AEST    20.71 °C
    7-Jun-2016 Tue 18:45:02 AEST    20.78 °C
    7-Jun-2016 Tue 19:00:03 AEST    20.83 °C
    7-Jun-2016 Tue 19:15:03 AEST    20.88 °C
    7-Jun-2016 Tue 19:30:04 AEST    20.89 °C
    7-Jun-2016 Tue 19:45:03 AEST    20.9 °C
    7-Jun-2016 Tue 20:00:03 AEST    20.92 °C
    7-Jun-2016 Tue 20:15:05 AEST    20.91 °C
    7-Jun-2016 Tue 20:30:07 AEST    20.88 °C
    7-Jun-2016 Tue 20:45:03 AEST    20.93 °C
    7-Jun-2016 Tue 21:00:02 AEST    20.93 °C
    7-Jun-2016 Tue 21:15:04 AEST    20.93 °C
    7-Jun-2016 Tue 21:30:03 AEST    20.88 °C
    7-Jun-2016 Tue 21:45:03 AEST    20.93 °C
    7-Jun-2016 Tue 22:00:02 AEST    20.93 °C
    7-Jun-2016 Tue 22:15:04 AEST    20.73 °C
    7-Jun-2016 Tue 22:30:02 AEST    20.69 °C
    7-Jun-2016 Tue 22:45:03 AEST    20.68 °C
    7-Jun-2016 Tue 23:00:03 AEST    20.66 °C
    7-Jun-2016 Tue 23:15:03 AEST    20.65 °C
    7-Jun-2016 Tue 23:30:03 AEST    20.6 °C
    7-Jun-2016 Tue 23:45:03 AEST    20.54 °C
    8-Jun-2016 Wed 00:00:03 AEST    20.51 °C

[ChristianTremblay]

I'll keep it open so you can test from your side. Works from mine (stage branch)