1.Introduction #

Electrical Sub-Metering with 12 Channels and LoRaWAN Wireless Communication

Introducing the SQUID Pro, a revolutionary 12-channel energy meter for electrical sub-metering of your single-phase and three-phase installations.

Capable of measuring and transmitting via LoRaWAN wireless communication: active power, reactive power, power factor, and other information. This PRO version surpasses the performance of traditional meters for optimized management of your installations.

With its 12 snap-on current measurement clamps, 3 voltage inputs, long-range and secure connectivity, the SQUID Pro transmits real-time energy data, providing you with complete control over your consumption and a comprehensive view of your electrical network.

Experience unparalleled performance and intelligent energy management for energy savings and improved operational efficiency.




  • Electrical sub-metering with 12 measurements per snap-on clamps.
  • Accurate measurement of active power, reactive power, and power factor for optimized energy management.
  • LoRaWAN wireless communication for reliable, long-range, and secure connectivity.
  • Real-time data transmission for optimal tracking of your energy consumption.
  • Configuration and updates via a simple and intuitive application.
  • 4 sizes of clamps available from 10mm (75A) to 36mm (600A). No configuration required.


  • Energy: consumed active energy, produced active energy, positive reactive energy, negative reactive energy, apparent energy.
  • Power: active power, reactive power, apparent power.
  • Currents.
  • Voltages.
  • Frequency.

Use Cases

  • Building Management: The SQUID Pro is the ideal solution for monitoring and optimizing energy consumption in tertiary buildings such as offices, shopping centers, and hospitals. With its advanced technology, it detects energy-intensive equipment, analyzes consumption peaks, and identifies energy-saving opportunities, allowing you to reduce costs and improve energy performance.
  • Industry: Industrial companies can benefit from the SQUID Pro to effectively monitor and control the energy consumption of their machines and equipment. This leads to optimized preventive maintenance, improved production processes, and significant reduction in energy costs.
  • ISO 50001 Compliance and Tertiary Decree: By choosing the SQUID Pro, you facilitate the implementation of your energy management project and ensure compliance with ISO 50001 standards and the tertiary decree. Opt for a high-performance and accurate solution for efficient and sustainable energy management.

2.Dangers and Warnings #

Failure to comply with the instructions in this manual shall not hold the manufacturer liable.

Any intervention on the product must be carried out by a qualified person.

Product replacement must be performed by a qualified person.

The device must be used in accordance with the specifications outlined in this documentation. Otherwise, there is a risk of danger.

No part of the device should be replaced or removed.

Disconnect all power sources before working on this device.

3.Installation and Implementation #

Before starting the installation of the SQUID Pro, ensure that you use a 5VDC – 2A power supply positioned at the head to power the device. It is important to maintain and separate the wiring of Low Voltage Safety Circuits (TBTS) from the circuits under dangerous voltage to ensure safety and proper system operation.

When wiring, make sure to observe the polarity of the power connector of the SQUID Pro.

The connection of the measurement clamps to the SQUID Pro is simplified using a quick connector, eliminating the need for tools. Connect the measurement probes to the 12 connectors located on the top and bottom of the device. Make sure not to exceed the maximum current specification for each measurement clamp to avoid the risk of damage or overheating.

To ensure safety during the installation of the clamps, it is imperative to perform this operation when the circuit is de-energized. Use exclusively Ewattch measurement clamps with the reference CURCLAMP-HC-SX, specially designed for optimal compatibility with the SQUID Pro.

The current measurement clamps of the SQUID Pro have a specific orientation, which must be respected. The clamps must be installed so that the arrow on the clamp points towards the energy consumer.

By following these installation and implementation recommendations, you will ensure safe and efficient operation of your SQUID Pro electrical sub-metering system.

There are 2 possible wiring modes with the SQUID Pro:

  • Three-phase mode, allowing the measurement of 4 three-phase circuits.

Caution: It is necessary to follow the indications presented in diagram 1 for the wiring.

  • Single-phase mode, allowing the measurement of 12 single-phase circuits.

Caution: It is necessary to follow the indications presented in diagram 2 for the wiring.

Three-phase wiring


Diagram 1








Single-phase Wiring


Diagram 2








4.Configuration Software #

The SQUID Pro comes equipped with user-friendly and intuitive configuration software, specifically designed to facilitate the updating and customization of your electrical sub-metering device. With its mini-USB connection, you can easily connect the SQUID Pro to your computer and access the software to personalize the settings according to your needs.

The software is available at the following link:


The software allows you to configure the desired types of measurements, transmission intervals, LoRa communication, and many other options with just a few clicks.

Furthermore, you benefit from firmware update support, ensuring that your device stays up to date with the latest improvements and features. With the SQUID Pro configuration software, you have complete control over your sub-metering system, guaranteeing accurate monitoring and continuous optimization of your energy consumption. 

5.Default parameters #

  • Radio communication: LoRaWan
  • LoRaWan mode: OTAA
  • ADR: activated
  • Messages confirmed: deactivated
  • Periodic reconnection to the LoRawan network: deactivated
  • Time between two radio communication of mesures: 10 minutes
  • Activated measurements: Active energies

6.LoRaWAN Frame Description (Payloads) #

The Squid Pro transmits its data in a raw format over various LoRaWAN public and private networks. The section below shows you how to decode the frames (payloads) sent by the Squid Pro.

Periodic Frames

Periodic frames contain the data measured by the Squid Pro.

Example of a transmitted periodic frame (HEX format):

00 26 40 C3 860400 040000 28E866 3C6692 D29766 9FB967 040000 040000 DF0C01 040000 050000 32A400


Tip – Rollover Management

To facilitate the management of energy measurement rollovers, the most significant bit of these measurements is used to indicate if a rollover has already occurred. It is never reset to 0. Therefore, during a rollover, the measurement will transition from 0xFFFFFF to 0x800000.

Tip – LoRaWAN Payload Decoding

To facilitate the integration of products communicating via the LoRaWAN network, Ewattch has developed a payload decoder available at this address: https://ewattch-documentation.com/?page_id=10390.

7.Display Examples #

8.Compatible Platforms #

We are committed to providing extensive compatibility for our products, including the SQUID PRO, with various platforms in the market. We understand the importance of flexibility and interoperability for our customers, which is why we strive for seamless integration of our solutions with the most popular and innovative platforms. If you wish to use a platform that is not yet listed as compatible, please feel free to contact us.

9.Technical Specifications #

  • Energies: Active consumed, Active produced, Reactive positive, Reactive negative, Apparent
  • Powers: Active, Reactive, Apparent
  • Currents
  • Voltages
  • Frequency
  • Frequency : 868MHz
  • Maximum transmission power : 25mW
  • Communication distance : up to 15km in open field
  • Version : 1.0.1
  • Class : A
  • Voltage : 5 VDC via an external power supply
  • Maximum consumption : 0,5A


Measurement Current Inputs
  • 12 inputs
  • 4 available clamp sizes : 10mm (75A) / 16mm (100A) / 24mm (300A) / 36mm (600A max)
  • Clamp type : Open current transformer
  • Cable length for clamps : 2m
Voltage Inputs
  • 4-pole connector : for conductors from 0.2mm² to 2.5mm²
  • 4-pole connector: 
  • 3 phases et neutral (230VAC)
  • 1 micro-USB port
  • Connector type: SMA femelle                      
  • Impedance : 50 ohms
  • Frequency : 868 MHz
  • 2-pole connector : 5VDC and ground for conductors from 0.15mm² to 1.5mm²
  • Intended use : Indoor (IP20)
  • Operating Temperature : from 5 to 60°C
  • Storage Temperature : From -20°C to +70°C
  • Operating Humidity : From 10% to 80%, non-condensing
  • Storage Humidity : From 10% to 80%, non-condensing
  • Maximum Altitude : 2000 m
  • Power Supply Voltage Fluctuation: +-10% of nominal voltage
  • Pollution Degree :  1
  • Overvoltage Category :   III
  • Dimensions (H X W X D) : 90,5 x 87,8 x 62 mm
  • Occupies : 5 modules
  • Weight : 152 g
  • Mounting : DIN EN 6 0715 rail (1 x 35 mm)

10.Certifications and Compliance #

  • EN 61000-6-2: Immunity for industrial environments
  • EN 61000-6-3: Emission for residential environments
  • EN 55022: IT equipment immunity
  • EN 30022
  • EN 61010 : Electrical measuring equipment

11.References #

KIT SQUID-PRO : Kits including a SQUID-PRO and all necessary accessories:

  • 1 power supply with DIN rail mounting 230VAC-5VDC (ref.: ALIM-RAIL-5V)
  • 1 magnetic antenna for external mounting (ref.: ANTMAGNSUP)
  • Note: The kit does not include any current clamps.

CURCLAMP-HC-S1 : Clip-on current clamp Ø10mm – 75A eff max

CURCLAMP-HC-S2 : Clip-on current clamp Ø16mm – 100A eff max

CURCLAMP-HC-S3 : Clip-on current clamp Ø24mm – 300A eff max

CURCLAMP-HC-S4 : Clip-on current clamp Ø36mm – 600A eff max

SQUID-PRO : Product reference without accessories
ALIM-RAIL-5V : 230VAC 5VDC power supply with DIN rail mounting
ANTMAGNSUP : Antenna with magnetic base (Cable length: 4m)


12.Contact #

13, Rue Maurice Jeandon
88100 Saint-Dié des Vosges

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