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Sensor battery states
The Ecowitt gateway driver includes sensor battery state levels in emitted loop packets. The Ecowitt gateway driver also displays sensor battery state levels when run directly using the --sensors, --live-data, --test-driver and --test-service command line options. The sensor battery state values reported by the driver vary from sensor to sensor and must be interpreted accordingly to determine the correct sensor battery state.
The following table details the sensor battery state levels reported by the Ecowitt gateway driver along with possible outputs and low battery indication values.
| Sensor | Default loop packet field1 | Driver output | Low battery indication | Remarks |
|---|---|---|---|---|
| WH24 | wh24_batt |
0 or 1 | 1 | |
| WH25 | wh25_batt |
0 or 1 | 1 | |
| WH26 | wh26_batt |
0 or 1 | 1 | |
| WH31 | wh31_batt |
0 or 1 | 1 | |
| WH32 | wh32_batt |
0 or 1 | 1 | WH32 is not included in the API but anecdotal evidence shows its battery state is reported and available through the API. Work is ongoing to reliably obtain WH32 battery state data. |
| WN34 | wn34_chx_batt |
Battery volts | <=1.2 | Supports up to eight channels (x = 1 to 8) |
| WN35 | wn35_chx_batt |
Battery volts | <=1.2 | Supports up to eight channels (x = 1 to 8) |
| WH40 | wh40_batt |
Battery volts | 1 | Original hardware version does not report battery voltage and gateway device reports a constant (and incorrect) 1.6V |
| WH41 | wh41_chx_batt |
0 - 62 | <=1 | Supports up to four channels (x = 1 to 4). API lists WH41 but may be WH41 or WH43. |
| WH45 | wh45_batt |
0 - 5 | <=1 | |
| WH51 | wh51_chx_batt |
Battery volts | <=1.2 | Supports up to eight channels (x = 1 to 8). API states that up to 16 channels are supported but WSView Plus app shows 8 channels only. |
| WH55 | wh55_chx_batt |
0 - 5 | <=1 | Supports up to four channels (x = 1 to 4) |
| WH57 | wh57_batt |
0 - 5 | <=1 | |
| WH65 | wh65_batt |
0 or 1 | 1 | |
| WH68 | wh68_batt |
Battery volts | <=1.2 | |
| WS80 | ws80_batt |
Battery volts | Note 3. | |
| WS90 | w90_batt |
Battery volts | Note 3. |
1 These field names are the default names used by the Ecowitt gateway driver. As with observation fields they may be mapped to other field names by altering the default field map through use of [[field_map]] and/or [[field_map_extensions]] config options.
2 the Ecowitt LAN/Wi-Fi Gateway API states values from 0 to 5 inclusive are used but anecdotal evidence shows value 6 is emitted by WH43 when connected to external DC power.
3 the Ecowitt LAN/Wi-Fi Gateway API does not specify a low battery value for this device.