SMX MQTT-Spezifikation

This document provides a comprehensive technical guide for working with the MQTT interface of the SensMax Data Collector series.

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1. Overview

This document describes the parameters and commands used for communication between the MQTT broker and the SensMax data collector.

1.1. Topics description

Two topic branches are used for data exchange. The collector sends data to topic {user_prefix}smx/device/{collector_serial}, and receives incoming commands and settings from topic {user_prefix}smx/server/{collector_serial}.

Using of {user_prefix} is optional, it can be added by the user in the device settings. The {collector_serial} is the 9-digit serial number of the data collector, which is printed on its housing.

To subscribe to all messages sent by a specific collector, user can subscribe to: smx/device/{collector_serial}/#

To subscribe to all SensMax devices, user need to subscribe to: smx/device/#

1.2. Supported devices

All SensMax data collectors are divided into two main types: REGULAR and TIMESTAMP. Depending on the device type, different MQTT commands are supported.

REGULAR device type

REGULAR devices are designed to send data in a 24-hour format, where data divided at 1-hour intervals. This type of device follows a predefined schedule for data delivery and does not support immediate data transmission. As a result, the data from REGULAR devices is collected periodically throughout the day, and there is no option for real-time data updates.

TIMESTAMP device type

These devices send data in a 24-hour format, where data divided at 5-minute intervals. Additionally, TIMESTAMP devices are capable of sending individual data packets for each new visitor, enabling real-time monitoring. The immediate data delivery capability makes these devices suitable for situations where up-to-the-minute data is crucial for operational decisions or analysis.

List of supported data collector models and their types:

Device model name	Device type
SensMax Wi-Fi LR	REGULAR
SensMax Wi-Fi SLR	REGULAR
SensMax Wi-Fi PRO	REGULAR
SensMax SMX LR	REGULAR
SensMax SMX SLR	REGULAR
SensMax SMX PRO	REGULAR
SensMax Wi-Fi LR TS	TIMESTAMP
SensMax Wi-Fi SLR TS	TIMESTAMP
SensMax SMX LR TS	TIMESTAMP
SensMax SMX SLR TS	TIMESTAMP

1.3. Power profiles

The data collectors support multiple power profiles that allows to set the operating mode of the connected sensors. The power profile is configured in the settings command.

Power profile	Supported device type	Description
ImmediateDelivery	TIMESTAMP only	Data about each new visitor is immediately delivered to the broker. Also 24 hour data divided in 5-min intervals uploads to broker every 5 minutes.
NormalPowerProfile	REGULAR, TIMESTAMP	Sensors send data to collector every 15 minutes. Data uploading to the broker every 15 minutes.
MaxBatteryLife	REGULAR, TIMESTAMP	Sensors send data to collector every 40 minutes. Data uploading to the broker every 15 minutes.
TestPowerProfile	REGULAR, TIMESTAMP	Sensors send data to collector every 60 seconds. Data uploading to the broker every 60 seconds.

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2. Incoming Commands (Data Packets Sent from the MQTT Broker to the Device)

All commands sent to the device from the broker are optional. The data collector will operate and send data to the broker without first receiving settings from the broker.

2.1. sync_list

This command is used to send the device an up-to-date list of linked sensors and their names. If an empty device_list is sent, all sensors linked to the collector will be deleted.

• Topic: {user_prefix}smx/server/{collector_serial}
• Retained: 1
• Supported device type: REGULAR, TIMESTAMP

JSON parameter description:

Parameter	Value	Required	Type	Comments
messageType	"sync_list"	Yes	string
collector_serial	<collector serial>	Yes	string	The 9-digit serial number of the data collector, which is printed on its housing.
device_list		Yes	object
<sensor 1 serial>	<sensor 1 name>	Optional	string
<sensor 2 serial>	<sensor 2 name>	Optional	string

Example:

{
  "messageType": "sync_list",
  "collector_serial": "051000222",
  "device_list": {
    "041000111": "Shop AAA",
    "041000222": "Shop BBB",
    "041000333": "Riga mall"
  }
}

2.2. settings

This command is used to send settings to the device.

• Topic: {user_prefix}smx/server/{collector_serial}
• Retained: 1
• Supported device type: REGULAR, TIMESTAMP

JSON parameter description:

Parameter	Value	Required	Type	Comments
messageType	"settings"	Yes	string
collector_serial	<collector serial>	Yes	string	The 9-digit serial number of the data collector.
time_zone	<time zone>	Optional	string	Time zone format is "UTC+HH:00". Where HH is hour offset. Leading zero required also.
dst	true / false	Optional	bool	Apply daylight saving time.
power_profile	<power profile>	Optional	string	Supported power profiles: ImmediateDelivery, TestPowerProfile, MaxBatteryLife, NormalPowerProfile.
make_beep	true / false	Optional	bool	If enabled, all connected sensors will emit sound when new visitor detected.

Example:

{
  "messageType": "settings",
  "collector_serial": "051000222", 
  "time_zone": "UTC+03:00",
  "dst": true, 
  "power_profile": "NormalPowerProfile", 
  "make_beep": false
}

2.3. reset

After receiving this command, the device performs a reboot.

• Topic: {user_prefix}smx/server/{collector_serial}
• Retained: 0
• Supported device type: REGULAR, TIMESTAMP

JSON parameter description:

Parameter	Value	Required	Type	Comments
messageType	"reset"	Yes	string
collector_serial	<collector serial>	Yes	string	The 9-digit serial number of the data collector.

Example:

{
  "messageType": "reset",
  "collector_serial": "051000222"
}

2.4. data_request

This command forces the data collector to resend all data for the specified date. If no data for the specified date is found in memory, the device will send error_notification.

• Topic: {user_prefix}smx/server/{collector_serial}
• Retained: 0
• Supported device type: TIMESTAMP only

JSON parameter description:

Parameter	Value	Required	Type	Comments
messageType	"data_request"	Yes	string
collector_serial	<collector serial>	Yes	string	The 9-digit serial number of the data collector.
date	<date>	Yes	string	Date should be presented in format DD/MM/YY.

Example:

{
  "messageType": "data_request",
  "collector_serial": "051000222",
  "date": "06/12/23"
}

2.5. memory_info

After receiving this command, the device will send a memory_info packet that contains a list of all dates that contain data in memory.

• Topic: {user_prefix}smx/server/{collector_serial}
• Retained: 0
• Supported device type: TIMESTAMP only

JSON parameter description:

Parameter	Value	Required	Type	Comments
messageType	"memory_info"	Yes	string
collector_serial	<collector serial>	Yes	string	The 9-digit serial number of the data collector.

Example:

{
  "messageType": "memory_info",
  "collector_serial": "051000222"
}

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3. Outgoing Packets (Data Packets Sent from the Device to the MQTT Broker)

3.1. sync_list

This packets sends to broker after each device reboot and after any changes in sensor list.

• Topic: {user_prefix}smx/device/{collector_serial}/sync_list
• Retained: 1
• Supported device type: REGULAR, TIMESTAMP

JSON parameter description:

Parameter	Value	Type	Comments
messageType	"sync_list"	string
id	<message ID>	string	Device provides unique message ID for each message
collector_id	<collector ID>	string	The collector ID allows to identify device type. Possible values: COLLECTOR-TS (for TIMESTAMP type), COLLECTOR (for REGULAR type)
collector_serial	<collector serial>	string	The 9-digit serial number of the data collector.
collector_frm	<firmware version>	string	Current firmware version of the SensMax Data Collector device.
device_list		object
<sensor 1 serial>	<sensor 1 name>	string
<sensor 2 serial>	<sensor 2 name>	string

Example:

{ 
  "messageType": "sync_list",
  "id": "AB12F1", 
  "collector_id": "COLLECTOR-TS",
  "collector_serial": "051000222", 
  "collector_frm": "1.0", 
  "device_list":
  {
    "041000111": "Shop AAA",
    "041000222": "Shop BBB",
    "041000333": "Riga mall"
  }
}

3.2. settings

This packet sends to broker when device settings were changed, how also after device reboot and once per day.

• Topic: {user_prefix}smx/device/{collector_serial}/settings
• Retained: 1
• Supported device type: REGULAR, TIMESTAMP

JSON parameter description:

Parameter	Value	Type	Comments
messageType	"settings"	string
id	<message ID>	string	Device provides unique message ID for each message
collector_id	<collector ID>	string	Possible values: COLLECTOR-TS, COLLECTOR
collector_serial	<collector serial>	string	The 9-digit serial number of the data collector.
collector_frm	<firmware version>	string	Current firmware version of the SensMax Data Collector device.
time_zone	<time zone>	string	Time zone format is "UTC+HH:00".
dst	true / false	bool	Apply daylight saving time.
power_profile	<power profile>	string	Current power profile.
make_beep	true / false	bool	If enabled, all connected sensors will emit sound when new visitor detected.
request_settings_update	true / false	bool	The sensor sends true after a reboot or once a day. This flag used optionally to force the user application to update actual current settings on broker.

Example:

{
  "messageType": "settings",
  "id": "AB12F1",
  "collector_id": "COLLECTOR-TS", 
  "collector_serial": "051000222",
  "collector_frm": "1.0", 
  "time_zone": "UTC+03:00",
  "dst": true, 
  "power_profile": "ImmediateDelivery",
  "make_beep": false, 
  "request_settings_update": false 
}

3.3. memory_info

This packets sends to broker after Data Collector received the "memory_info" request from the broker.

• Topic: {user_prefix}smx/device/{collector_serial}/memory_info
• Retained: 0
• Supported device type: TIMESTAMP only

JSON parameter description:

Parameter	Value	Type	Comments
messageType	"memory_info"	string
id	<message ID>	string	Device provides unique message ID for each message
collector_id	<collector ID>	string	Possible values: COLLECTOR-TS, COLLECTOR
collector_serial	<collector serial>	string	The 9-digit serial number of the data collector.
notes		object
<note Nr>	<date>	string

Example:

{
  "messageType": "memory_info",
  "id": "6833498",
  "collector_id": "COLLECTOR-TS",
  "collector_serial": "051002363",
  "notes": {
    "note 00": "21/08/24",
    "note 01": "22/08/24"
  }
}

3.4. error_notification

This packet sends to broker when device cannot accept command by any reason.

• Topic: {user_prefix}smx/device/{collector_serial}/errors
• Retained: 0
• Supported device type: REGULAR, TIMESTAMP

JSON parameter description:

Parameter	Value	Type	Comments
messageType	"error_notification"	string
id	<message ID>	string	Device provides unique message ID for each message
collector_id	<collector ID>	string	Possible values: COLLECTOR-TS, COLLECTOR
collector_serial	<collector serial>	string	The 9-digit serial number of the data collector.
description	<error description>	string	Possible values: "unknown command", "data not found"

Example:

{
  "messageType": "error_notification",
  "id": "AB12F1",
  "collector_id": "COLLECTOR-TS", 
  "collector_serial": "051000222", 
  "description": "unknown command"
}

3.5. single_ts

This packed used for sending data about every new visitor. This packet can be send immediately after detecting of new visitor, if the ImmediateDelivery power profile enabled.

• Topic: {user_prefix}smx/device/{collector_serial}/single_ts/{date}/{sensor_serial}
• The {date} in a topic displays the date in YYYYMMDD format.
• The {sensor_serial} in the topic corresponds to the serial number of the sensor from which the data is sent.
• Retained: 0
• Supported device type: TIMESTAMP only

JSON parameter description:

Parameter	Value	Type	Comments
messageType	"single_ts"	string
id	<message ID>	string	Device provides unique message ID for each message
collector_id	<collector ID>	string	Possible values: COLLECTOR-TS, COLLECTOR
collector_serial	<collector serial>	string	The 9-digit serial number of the data collector.
sensor_serial	<sensor serial>	string	The 9-digit serial number of the sensor's direction.
sensor_name	<sensor name>	string	The name of sensor
sensor_type	<sensor type>	string	Possible values: BI-DIR (for bi-directional), UNI-DIR (for uni-directional), LOYALTY BUTTON (for Loyalty Button)
in_today	<in today>	number	The sum of all incoming visitors for today. Present only for BI-DIR type sensors.
out_today	<out today>	number	The sum of all outgoing visitors for today. Present only for BI-DIR type sensors.
RSSI	<rssi value>	number	Reflects the link quality between the sensor and data collector (0…100).
direction	<direction code>	string	Reflects the motion direction (IN, OUT) or which button was pressed (GREEN, YELLOW, RED).
battery	1 (OK) / 0 (low)	number	Used to indicate when the sensor battery is low.
date	<date>	string	Date of current visit. Presented in format YYYY-MM-DD
time	<time>	string	Time of current visit. Presented in format HH:MM:SS
five-min	<five-min number>	number	The number of the five-minute to which this visitor relates (0...287).

Example:

{
  "messageType": "single_ts",
  "id": "AB12F1", 
  "collector_id": "COLLECTOR-TS",
  "collector_serial": "051000222", 
  "sensor_serial": "141000222", 
  "sensor_name": "Shop AAA IN", 
  "sensor_type": "BI-DIR", 
  "in_today": 123,
  "out_today": 222,
  "RSSI": 90,
  "direction": "IN", 
  "battery": 1, 
  "date": "2016-04-26", 
  "time": "10:22:30", 
  "five-min": 124 
}

3.6. sensor_blocked_error

This packed used for sending notification when sensor is blocked. This packet can be send immediately after detecting of new visitor, if the ImmediateDelivery power profile enabled. This packet available for BI-DIR sensors only, as LOYALTY BUTTON TIMESTAMP do not provides blocking error data.

• Topic: {user_prefix}smx/device/{collector_serial}/single_ts/{date}/{sensor_serial}
• Retained: 0
• Supported device type: TIMESTAMP only

JSON parameter description:

Parameter	Value	Type	Comments
messageType	"sensor_blocked_error"	string
id	<message ID>	string	Device provides unique message ID for each message
collector_id	<collector ID>	string	Possible values: COLLECTOR-TS, COLLECTOR
collector_serial	<collector serial>	string	The 9-digit serial number of the data collector.
sensor_serial	<sensor serial>	string	The 9-digit serial number of the sensor's direction.
sensor_name	<sensor name>	string	The name of sensor
sensor_type	<sensor type>	string	Possible values: BI-DIR, UNI-DIR, LOYALTY BUTTON
in_today	<in today>	number	The sum of all incoming visitors for today. Present only for BI-DIR type sensors.
out_today	<out today>	number	The sum of all outgoing visitors for today. Present only for BI-DIR type sensors.
RSSI	<rssi value>	number	Reflects the link quality between the sensor and data collector (0…100).
direction	IN / OUT	string	Reflects the motion direction of captured visitor. Present only for BI-DIR type sensors.
battery	1 (OK) / 0 (low)	number	Used to indicate when the sensor battery is low.
date	<date>	string	Date of current visit. Presented in format YYYY-MM-DD
time	<time>	string	Time of current visit. Presented in format HH:MM:SS
five-min	<five-min number>	number	The number of the five-minute to which this visitor relates (0...287).

Example:

{
  "messageType": "sensor_blocked_error",
  "id": "AB12F1", 
  "collector_id": "COLLECTOR-TS",
  "collector_serial": "051000222", 
  "sensor_serial": "141000222", 
  "sensor_name": "Shop AAA IN", 
  "sensor_type": "BI-DIR", 
  "in_today": 123,
  "out_today": 222,
  "RSSI": 90,
  "direction": "IN", 
  "battery": 1, 
  "date": "2016-04-26", 
  "time": "10:22:30", 
  "five-min": 124 
}

3.7. 5_min_data

This packet is used to send 24 hours of data divided into 5-minute intervals. The packet is sent to the broker according to schedule defined for the selected power profile.

• Topic: {user_prefix}smx/device/{collector_serial}/5_min_data/{date}/{sensor_serial}
• Retained: 0 or 1 (depending from user settings)
• Supported device type: TIMESTAMP only

JSON parameter description:

Parameter	Value	Type	Comments
messageType	"5_min_data"	string
id	<message ID>	string	Device provides unique message ID for each message
collector_id	<collector ID>	string	Possible values: COLLECTOR-TS, COLLECTOR
collector_serial	<collector serial>	string	The 9-digit serial number of the data collector.
sensor_serial	<sensor serial>	string	The 9-digit serial number of the sensor's direction.
sensor_name	<sensor name>	string	The name of sensor
sensor_type	<sensor type>	string	Possible values: BI-DIR, UNI-DIR, LOYALTY BUTTON
direction	<direction code>	string	Reflects the motion direction of captured visitor for BI-DIR type sensors. Or which button was pressed for the LOYALTY BUTTON sensors. Possible direction codes: IN, OUT, GREEN, YELLOW, RED
battery	1 (OK) / 0 (low)	number	Used to indicate when the sensor battery is low.
date	<date>	string	Date of data to be sent. Presented in format YYYY-MM-DD
first_entry_time	<time>	string	Time of the first visitor per day HH:MM:SS
last_entry_time	<time>	string	Time of the last visitor per day HH:MM:SS
visits		array	Array of 24 hours of data divided into 5-minute intervals. A total of 288 values.
errors		array	An array of errors over 24 hours, divided into 5-minute intervals. Value 0 means that there were no errors during this interval. Value 1 means that beam blocking was detected during this interval. There are 288 values in total. Presented for BI-DIR sensors only.

Example:

{
  "messageType": "5_min_data",
  "id": "AB12F1", 
  "collector_id": "COLLECTOR-TS",
  "collector_serial": "051000222", 
  "collector_frm": "1.0",
  "sensor_serial": "141000222", 
  "sensor_name": "Shop AAA", 
  "battery": 1, 
  "sensor_type": "BI-DIR", 
  "direction": "IN", 
  "date": "2016-04-26", 
  "first_entry_time": "08:35:59", 
  "last_entry_time": "17:35:59", 
  "visits": [
    0,0,0,0,0,0,0,0,1,2,3,4,5,6,7,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,22,0,0,0,0,0,56,0,0,0,23,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,55,128,16,5,45,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
  ],
  "errors": [
    0,0,0,0,0,0,0,0,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
  ]
}

3.8. 24_hour_data

This packet is used to send 24 hours of data divided into 5-minute intervals. The packet is sent to the broker according to schedule defined for the selected power profile.

• Topic: {user_prefix}smx/device/{collector_serial}/24_hour_data/{date}/{sensor_serial}
• Retained: 0 or 1 (depending from user settings)
• Supported device type: REGULAR only

JSON parameter description:

Parameter	Value	Type	Comments
messageType	"24_hour_data"	string
id	<message ID>	string	Device provides unique message ID for each message
collector_id	<collector ID>	string	Possible values: COLLECTOR-TS, COLLECTOR
collector_serial	<collector serial>	string	The 9-digit serial number of the data collector.
sensor_serial	<sensor serial>	string	The 9-digit serial number of the sensor's direction.
sensor_name	<sensor name>	string	The name of sensor
sensor_type	<sensor type>	string	Possible values: BI-DIR, UNI-DIR, LOYALTY BUTTON
direction	<direction code>	string	Presented for BI-DIR type sensors only. Reflects the motion direction (IN, OUT).
battery	1 (OK) / 0 (low)	number	Used to indicate when the sensor battery is low.
date	<date>	string	Date of data to be sent. Presented in format YYYY-MM-DD
first_entry_time	<time>	string	Time of the first visitor per day HH:MM:SS
last_entry_time	<time>	string	Time of the last visitor per day HH:MM:SS
GREEN_pressed_count	<pressed count>	number	Represent how many times GREEN button was pressed for current date. Presented for LOYALTY BUTTON sensors only.
YELLOW_pressed_count	<pressed count>	number	Represent how many times YELLOW button was pressed for current date. Presented for LOYALTY BUTTON sensors only.
RED_pressed_count	<pressed count>	number	Represent how many times RED button was pressed for current date. Presented for LOYALTY BUTTON sensors only.
visits		array	Array of 24 hours of data divided into 1-hour intervals. A total of 24 values. Presented for BI-DIR type sensors only.
errors		array	An array of errors over 24 hours, divided into 1-hour intervals. Value 0 means that there were no errors during this interval. Value 1 means that beam/button blocking was detected during this interval. There are 24 values in total.

Example 1: BI-DIR sensor type:

{
  "messageType": "24_hour_data",
  "id": "AB12F1", 
  "collector_id": "COLLECTOR",
  "collector_serial": "050000222",
  "collector_frm": "1.0",
  "sensor_serial": "140000555", 
  "sensor_name": "AAA", 
  "sensor_type": "BI-DIR", 
  "direction": "IN", 
  "battery": 1, 
  "date": "2016-04-26", 
  "first_entry_time": "08:35:59", 
  "last_entry_time": "17:35:59", 
  "visits": [
    0,0,0,0,0,0,0,0,233,62,30,464,888,123,0,0,0,0,0,0,0,0,0,0 
  ],
  "errors": [
    0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 
  ]
}

Example 2: LOYALTY BUTTON sensor type:

{
  "messageType": "24_hour_data",
  "id": "AB12F1", 
  "collector_id": "COLLECTOR",
  "collector_serial": "050000222",
  "collector_frm": "1.0",
  "sensor_serial": "140000555", 
  "sensor_name": "AAA", 
  "sensor_type": "LOYALTY BUTTON", 
  "GREEN_pressed_count": 100,
  "YELLOW_pressed_count": 110, 
  "RED_pressed_count": 120, 
  "battery": 1, 
  "date": "2016-04-26", 
  "first_entry_time": "08:35:59", 
  "last_entry_time": "17:35:59", 
  "errors": [
    0,0,0,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 
  ]
}

3.9. ping

This packet can be used for monitoring of sensor activity and detecting situation when sensor offline. This packet sends every 5 minutes for every online sensor.

• Topic: {user_prefix}smx/device/{collector_serial}/ping/{date}/{sensor_serial}
• Retained: 0
• Supported device type: TIMESTAMP only

JSON parameter description:

Parameter	Value	Type	Comments
messageType	"ping"	string
id	<message ID>	string	Device provides unique message ID for each message
collector_id	<collector ID>	string	Possible values: COLLECTOR-TS, COLLECTOR
collector_serial	<collector serial>	string	The 9-digit serial number of the data collector.
sensor_serial	<sensor serial>	string	The 9-digit serial number of the sensor.
collector_frm	<firmware version>	string	Current firmware version of the SensMax Data Collector device.
sensor_name	<sensor name>	string	The name of sensor
battery	1 (OK) / 0 (low)	number	Used to indicate when the sensor battery is low.
date	<date>	string	Date of current ping. Presented in format YYYY-MM-DD
time	<time>	string	Time of current ping. Presented in format HH:MM:SS
five-min	<five-min number>	number	The number of the five-minute to which this ping relates (0...287).

Example:

{
  "messageType": "ping",
  "id": "AB12F1", 
  "collector_id": "COLLECTOR-TS",
  "collector_serial": "051000222", 
  "collector_frm": "1.0", 
  "sensor_serial": "041000222", 
  "sensor_name": "Shop AAA", 
  "battery": 1, 
  "date": "2016-04-26", 
  "time": "10:22:30", 
  "five-min": 124 
}