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CHESTER Counter

This article describes the core functionality, hardware description, default configuration, and example JSON messages for the catalog application CHESTER Counter.

danger

When upgrading firmware from v1.x.x to version v2.0.0 and newer - it is necessary to backup configuration.

caution

Some basics are not provided, as they are common for all the CHESTER catalog applications. For example, see the article Platform Management on how to work with the interactive console.

Application Overview​

The application CHESTER Counter is used to count pulses on eight digital inputs. They can be connected to a PLC/sensor output (NPN/PNP), push button, switch, relay, etc. The application counts the total number of pulses and also the number of pulses since the last report (configurable using the interval-report parameter).

Application Variants​

CHESTER Counter can be ordered in one of these variants:

CHESTER Counter​

The catalog CHESTER Counter hardware consists of the following ordering codes:

  • CHESTER-M-BCGLS - Standard mainboard

  • CHESTER-X0B:A - Input module (4 channels)

See Ordering Codes for more details.

Firmware build shield options: ctr_lte ctr_x0_a

CHESTER Counter Z​

The catalog CHESTER Counter Z hardware consists of the following ordering codes:

  • CHESTER-M-CGLS - Standard mainboard

  • CHESTER-X0B:A - Input module (4 channels)

  • CHESTER-Z1 - Backup module

See Ordering Codes for more details.

Firmware build shield options: ctr_lte ctr_x0_a ctr_z

Backup​

CHESTER Counter Z (equipped with CHESTER-Z1) can also report information on the backup battery and external DC power state.

  • The current battery voltage and external DC voltage are sent in every report.

  • When the DC power input changes, the timestamp of the change event is stored altogether with the connected/disconnected state, this information is buffered, and the buffer of the events is sent (at the latest) with the regular report (parameter interval-report).

  • Optionally, DC power input changes to the connected (parameter backup-report-connected) or disconnected (parameter backup-report-disconnected) states can be reported immediately or with a configurable delay (parameter event-report-delay) to allow capturing multiple consequent input changes.

  • The maximum number of reports per hour is configurable (parameter event-report-rate). The event throttling limits communication bandwidth and preserves the battery lifespan.

Default Configuration​

This is the default configuration (printed using the app config show command):

app config interval-sample 60
app config interval-report 1800

Firmware​

danger

When upgrading firmware from v1.x.x to version v2.0.0 and newer - it is necessary to backup configuration.

The latest firmware is available in Catalog Applications Firmware chapter.

Example JSON Message​

This example message was sent by a CHESTER with an X0 module only in the A slot. The message was sent because of a tamper event.

{
  "frame": {
    "protocol": 1,
    "sequence": 2,
    "timestamp": 1688127148
  },
  "attribute": {
    "vendor_name": "HARDWARIO",
    "product_name": "CHESTER-M",
    "hw_variant": "CDGLS",
    "hw_revision": "R3.4",
    "fw_version": "(unset)",
    "serial_number": "2159019054"
  },
  "state": {
    "uptime": 68
  },
  "battery": {
    "voltage_rest": null,
    "voltage_load": null,
    "current_load": null
  },
  "network": {
    "imei": 426556893,
    "imsi": 2907855241,
    "parameter": {
      "eest": 8,
      "ecl": 0,
      "rsrp": -75,
      "rsrq": -7,
      "snr": 16,
      "plmn": 23003,
      "cid": 1011233,
      "band": 20,
      "earfcn": 6447
    }
  },
  "thermometer": {
    "temperature": 24.31
  },
  "accelerometer": {
    "accel_x": -0.77,
    "accel_y": 3.37,
    "accel_z": 9.03,
    "orientation": 2
  },
  "counter": {
    "channel_1_total": 5,
    "channel_1_delta": 2,
    "channel_2_total": 5,
    "channel_2_delta": 3,
    "channel_3_total": 5,
    "channel_3_delta": 0,
    "channel_4_total": 7,
    "channel_4_delta": 0,
    "channel_5_total": null,
    "channel_5_delta": null,
    "channel_6_total": null,
    "channel_6_delta": null,
    "channel_7_total": null,
    "channel_7_delta": null,
    "channel_8_total": null,
    "channel_8_delta": null
  },
  "tamper": {
    "state": "active",
    "events": [
      {
        "timestamp": 1688127147,
        "type": "activated"
      }
    ]
  },
  "backup": {
    "line_voltage": 15,
    "batt_voltage": 2,
    "backup_state": 0,
    "events": []
  }
}