Test: Adeunis 868 Field Test Device

December 12, 2018

The Adeunis Field Test Device is the irreplaceable helper for all LoRaWAN field tests and range tests. With the help of the Adeunis Field Test Device range tests, geolocation, destination locations, and field strength tests can be carried out in LoRaWAN networks. This device is an indispensable tool in the construction and operation of LoRaWAN networks.

Product name: Field Test Device (FTD) LoRa
Category: Field test devices
Developer: Adeunis
283 rue Louis Néel
38920 CROLLES
France

The most important features at a glance

    • Class A LoRaWAN device
    • Configurable transmission cycle
    • configurable activation method (OTAA / ABP)
    • Reception of downlinks is possible
    • LoRaWan: V1.0.1
    • Connector Micro-USB – 5V, 500mA
    • integrated battery with USB charging function
    • Battery Lithium Ion Polymer 3.7V 2Ah 7.4Wh
    • External power supply possible (USB)
    • Radio frequencies: LoRaWAN: EU863-870
    • Operating temperature: -20 ° C to + 75 ° C
    • Standards: Directive 2014/53 / EU (RED)
    • Output power: 14 dBm (25mW) e
    • Sensitivity -140dBm (SF12)
    • Weight: 140g
    • Certifications: EN 300-220, EN 301-489, EN 60950
    • Dimensions: 186.20 x 75.20 x 22.80 mm

 

Unboxing: housing and processing

The field Test Device (FTD) is a practical handheld device with an integrated, flexible antenna. The case is made of a robust ABS GP22 plastic and features an Autotex polycarbonate coating. The antenna is a “K TC7AA” type. The integrated lithium-ion polymer battery with a capacity of 7.4Wh also makes longer field tests possible and can be charged via the micro USB port. The integrated display has a switchable backlight.

 

Connections

The micro USB port is used in addition to charging the internal battery for the configuration of the handset via a serial communication. The device has 2 push buttons with which uplinks can be triggered and the menu can be changed.

 

Configuration and operation

The default setting of the Adeunis Field Test Device is as follows:

  • GPS continuously activated
  • An uplink every 10 minutes and at the touch of a button
  • Class A, confirmed uplinks
  • Uplink Port: 1
  • Activation method: OTAA

With these settings, the first field tests can easily be carried out. However, for a longer battery life, e.g. the GPS operating mode or the LoRaWAN class can be changed. All other parameters can also be set via serial communication as shown in the following section.

Before the device can be registered on the LoRa network server, the necessary keys must first be known. Usually, the keys are printed with the respective handset. If the printout does not exist, the keys required for the default OTAA setting can be determined as follows. The unique device address (Dev-EUI) is located on the back of the handset under “ID”. The App-EUI is fixed by default and reads “0018B24441524632. The app key is different for each handset and must be read out via serial communication.

 

“Hands-on” – the how-to in individual steps

If the Adeunis field Test Device is connected to the PC via a micro USB cable, a virtual COM port will be installed automatically, provided the matching STM32 drivers are available on the PC. Linux and Windows 10 usually have these drivers on board. Adeunis also offers the drivers https://www.adeunis.com/en/produit/ftd-868-915-2/ on the website for download.

If the handset has been correctly recognized, the corresponding COM port must first be accessed via the Device Manager (Windows) or, for example, “Dmesg | grep tty “(Linux). The serial communication parameters are:

  • Rate 115 200 bps
  • Parity None
  • Data 8
  • Stop Bit 1

In order to communicate with the Adeunis field Test Device, it must first be put into “Command Mode”. To do this, the following characters (HEX) are sent via the serial interface.

It is important for all commands to the handset to have a “CR” or “CR” + “LF” at the end!

FFFFFFFF+++ (ASCII)

or

0x FF FF FF FF FF 2B 2B 2B (Hex)

The text “COMMAND MODE” will appear on the display of the handset, and on the serial interface, the reply will apear as “CM” also with a “CR”+ “LF”)
Next, the software version can be read out with the following command (ASCII):

AT/V  <cr><lf>

The answer to our review sample is:

8123AAB_PRG_1701_V01.00.07:8134AAE_PRG_1701_V01.04.00

To read out the app key, the ASCII command

ATT63 PROVIDER  <cr><lf>

must be sent to the device. The answer is simply “O”. Now the 4 registers can be read in which 4 Bytes of the 16 Bytes long App-Keys are stored. The registers are S216, S217, S218, and S219. A register is requested as follows:

ATS216?  <cr><lf>

The device will answer  for example with

S216=417220A1

The first 4 bytes contains the app key in HEX format. Now the remaining 3 registers can be queried.

The frequency of the automatic uplinks in the field test is also very helpful to increase – so you save the constant pushing of the Pushbuttons 1.
For this purpose, the value between 1 and 86400 (in seconds) * can be changed in register S380 as follows. ATS380 = XX <cr><lf> where “XX” is the value in seconds. In order to send every minute, for example,it needs the following command:

ATS380=60 <cr><lf>

A value of 0 indicates automatic sending.

*Note: As the Field Tester is designated as a test device, the user is required to comply with the LoRaWAN specification (regarding duty cycle control).

It is important that the changed settings be saved with the

AT&W <cr><lf>

command. Otherwise, they would be lost after turning the handset on/off. The answer from the handset is a simple “O”.

With the command

ATO  <cr><lf>

you leave the configuration mode. Again the answer is “O”. The complete list of available settings and commands are included in the Adeunis manual. The manual can, therefore, be downloaded via the following link:

https://www.adeunis.com/en/produit/ftd-868-915-2/

After exiting the configuration mode, the display of the Adeunis handset returns to the standard menu.

where the symbols have the following meanings:

GPS not synchronized yet

GPS syncs and receives coordinates

Join process active

manually triggered uplink

periodic uplink (default 10 minutes)

 

By pressing the “Pushbutton 2” you can change through different menus and activate the backlight. If the handset has successful GPS reception, the GPS menu looks like this:

Pressing the “Pushbutton 1” a manual uplink is triggered. This contains the data available at this time coded in the payload

  • Status
  • Temperature
  • GPS Latitude, GPS Longitude
  • GPS reception quality
  • Uplink counters
  • Downlink counter
  • Battery level
  • RSSI
  • SNR

A very detailed explanation of the payload is included in the available manual on the Adeunis website. In addition, all of the major LoRaWAN vendors (SmartMakers, TheThingsNetwork, Loriot) already offer decoders for the Adeunis Payload format. With SmartMakers, geo-coordinates and reception can be read from the Adeunis field test devices directly on a world map.

Conclusion

The Adeunis Field Test Device (FTD) is an indispensable device in building LoRaWAN networks. It fixes location finding for gateways and exploration areas at different locations. With the help of suitable field test software (eg lorawantester.com) all collected data can be graphically displayed and evaluated.

In addition to collecting the data on the side of the LoRaWAN network server, numerous information can be read directly from the device display in the field. Thus, in addition to an indicator for the reception quality (RSSI), the handset displays lost LoRaWAN packets (PER Testing). The display of the spreading factors and frequencies used enables detailed network planning.

The Adeunis handset has a very good GPS receiver, which ensures stable GPS reception even in poor environmental conditions. For this reason and the simple operation, the field test device made a very good impression on us.

Interested? Any questions?

The device is available in our IoT shop “thingHUB Market”.

 

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