LZ design FES LCD Display User manual

FES Wi-Fi Module
User manual, Version 1.0
LZ design d.o.o., •Brod 3D, 1370 Logatec, Slovenia •tel [phone]
[email protected] •www.front-electric-sustainer.com

FES Wi-fi Module Manual, Version 1.0 October 2022
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Table of Content
Table of Content.................................................................................................. 2
1. Important notices..................................................................................................... 3
1.1 Limited Warranty ................................................................................................. 3
2. Introduction ............................................................................................................. 4
3. Description............................................................................................................... 5
4. Initial setup.............................................................................................................. 6
Setting the device to access point (AP mode) .............................................................. 7
Connecting the device to an existing network (STA mode) ........................................... 7
5. Functionality ............................................................................................................ 8
Home tab.................................................................................................................. 8
Tasks tab................................................................................................................ 10
Voltage tab ............................................................................................................. 10
Impedance tab........................................................................................................ 11
Temperature tab ..................................................................................................... 11
Settings tab ............................................................................................................ 12
Logs tab ................................................................................................................. 12
6. Troubleshoting ....................................................................................................... 14
Default settings ....................................................................................................... 14
Power Saving Mode ................................................................................................. 14
7. Revision history...................................................................................................... 14

FES Wi-fi Module Manual, Version 1.0 October 2022
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1. Important notices
This user manual contains important information about proper and safe usage of “FES
Wi-Fi module”.
If you need more information, please contact the manufacturer LZ design.
Informations in this document are subject to change without notice. LZ design reserves
the right to change or improve this product and to make changes in the content of this
material without obligation to notify any person or organization of such changes or
improvements.
A Yellow triangle is shown for parts of the manual which should be read
carefully and are important
Notes with a red triangle describe procedures that are critical and may result
in reduced safety or may lead to critical situation
A bulb icon is shown when a useful hint is provided to the reader
1.1 Limited Warranty
This product is warranted to be free from defects in materials or workmanship for one year
from the date of purchase. Within this period, LZ design will, at its sole option, repair or
replace any components that fail in normal use. Such repair or replacement will be made at
no charge to the customer for parts and labor, however the customer shall be responsible
for any transportation cost. This warranty does not cover failures due to abuse, misuse,
accident, or unauthorized alterations or repairs.
Usage of device is at user’s own risk. Manufacturer LZ design will not under any
circumstances accept any responsibility or will be liable for possible damage on people,
animals or things, which might directly or indirectly happen from using FES Wi-Fi module.
With using of FES Wi-Fi module user automatically agree with above listed terms.
To obtain warranty service, please manufacturer of your glider, local dealer of glider
manufacturer or LZ design directly.
©LZ design. All rights reserved

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2. Introduction
FES Wi-Fi module is device that connects to FES battery pack via RS-485 and sets up its
own network (or connects to an existing network) to enable monitoring of your battery pack
in a browser on your smartphone or PC. Parameters such as cell voltages, current,
temperatures, state of charge and state of health are all easily displayed and trended. The
interface includes several tabs to ensure ease of use:
General tab - HOME is used to display important parameters while dedicated tabs can be
used to display advanced battery pack information. An alarm pop-up sign informs the user
in case of any system error or alarm, containing its diagnostics.
SETTINGS tab enables the user to configure all the voltage, current and system settings for
the battery pack including ESS settings. In addition, all the settings of the BMS may be
exported to a file and imported back as your default settings or for a purpose application.
LOGGING tab enables logging interval setting, importing logs and log analyzer. Logs are
saved to an internal 16 Gb micro-SD memory card and may be easily transferred to any
connected device for further analysis.
Additionally, the REC WiFi module enables to remotely activate a DC switch. A galvanically
isolated fused opto-relay is used to power the loads up to 100 VDC, 3A. This function is
easily controlled from a single pushbutton on your main screen.

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3. Description
Figure 1: WiFi module description
Figure 2: WiFi module enclosure dimensions.

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4. Initial setup
Follow next steps:
1. Connect the module DB plug to the Data port of FES battery pack, and switch ON
BMS.
2. Connect the power supply to the FES WiFi module.
3. If connecting the module for the first time, the device will set up an access point,
with default credentials (SSID: FES_BMS, PASS: none ).
4. Using a Wi-Fi supported device, connect to the access point FES-BMS_AP.
5. Open your browser (on PC, Tablet PC or Smartphone) and go to IP address
192.168.1.184 by typing it on your browser’s top line. If successful Main Menu
will open with battery pack status become visible.
6. If you want to monitor FES battery pack during charging, you can connect
remaining BMS data communication plug to the charger’s communication BMS data
socket.
BMS data socket
of FES KOP 602
charger
The WiFi module can be configured for direct access (AP) or integrated into home network
(STA). To access it remotely it will need to be integrated into home network as an STA
device and port forwarding set up. This is configured within your home router and is not
covered here as each manufacturer handles it differently.
PARAMETER
VALUE
UNIT
IP address
192.168.1.184
n.a.
Wi-Fi SSID
FES_BMS
n.a.
Wi-Fi password
none
n.a.
Wi-Fi module connection mode
Access point (AP)
n.a.
BMS RS-485 send address
6
n.a.
WiFi module RS-485 receive address
0
n.a.
BMS RS-485 bitrate
56
kbit
LCD RS-485 bitrate
56
kbit
Logging interval
600
s
Temperature units
-
°C
Table 1: Default WiFi module parameter settings

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Setting the device to direct access point (AP mode)
1. Connect to the WiFi device.
2. Select the Firmware tab from the Main menu.
3. Change the Wi-Fi name and Wi-Fi password (up to 50 ASCII signs for
both) to desired credentials and confirm with Submit button.
4. Device will restart and set up the new access point.
Connecting the device to home network (STA mode)
1. Connect to the Wifi device.
2. Select the Firmware tab from the Main menu.
3. Change the Wi-Fi name and Wi-Fi password (up to 50 ASCII signs for
both) of the desired network and confirm with Submit button.
4. If existing network is not found it will revert back an access point with set
credentials, so you maintain your link and can try again.
5. When the Wifi module finds and connects to home network access point,
WiFi network will be established, and you can log in to it when you reconnect
to your home network and find what dynamic IP address has been assigned
to it by your router. If you need to reconfigure it again locally, simply press
the Reset button to reset it back to default (AP) settings.

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5. Functionality
A list of tabs may be selected from the Main menu shown on the left side of the screen.
User may choose between:
-Home
-Tasks
-Voltage
-Impedance
-Temperature
-Settings
-Logs
-Firmware
Figure 3: Main menu tab selection.
Home tab
Battery pack main parameters are shown in the Home tab. FES BMS serial number is
shown on top, while the battery pack main parameters are shown below. State of charge
(SOC) is shown as a graphical colour bar and as a number in % as well. The colour of the
bar changes regarding the battery SOC state.
SOC RANGE [%]
SOC BAR APPERANCE
0-10
10-30
30-50
50-90
90-100
Table 2: Battery pack SOC bar colours

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Battery pack capacity in Ah is shown as total operational capacity and already used capacity.
Total battery pack voltage and charging current are shown as well as charging power in W.
Home tab also displays maximum and minimum cell voltage and maximum battery pack
temperature. State of health (SOH) is displayed under the SOC in %. See Fig. 4
Figure 4: Home screen tab as visible on smartphone
Numbers near the maximum and minimum cell voltage describe their location in the battery
pack. In case an error is present, an exclamation triangle appears in the middle of the
battery icon. User may press the sign for additional error description.
If device is connected to a unit that supports IO tasks, state of all outputs is also displayed.
General-purpose output indicates the state of integrated DC switch with galvanically isolated
opto relay. OFF indicates the relay is open and ON the opto-relay is closed. You can change
its state by pressing Turn on/Turn off button.

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Tasks tab
Figure 5: Tasks tab as visible on smartphone
This tab is designed for BMS firmware update.
Voltage tab
All the battery pack cell’s voltages are displayed. In case one of the cell’s voltage is too high
or too low regarding the BMS cell voltage setting, the value is highlighted in red colour.
Figure 5: Voltage levels of each cell (1-14 cells)

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Impedance tab
All the battery pack cell’s DC impedance values are displayed.
Figure 6: Cells impedances
Temperature tab
All the BMS temperature sensors values are displayed in this tab. On top BMS temperature
is shown, and below battery temperature sensors values are shown. If any temperature
sensor’s temperature is too high, it is highlighted in red.
Figure 7: BMS and Cells’ temperatures

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Settings tab
Figure 8: BMS settings
Enables the user to change most important BMS settings - when unlocked. A Manual
communication input windows in the Firmware tab enable the user to observe and set
non-listed settings.
Logs tab
Figure 9: Logs tab
FES Wi-Fi module logs all BMS data. User can select logging interval in steps from 5 s to 60
min. Logs can be viewed by clicking VIEW button or downloaded by clicking DOWNLOAD
button. If you want to view a saved log that is no longer present on the device, click Import
external log and choose the one you desire to view.
When viewing the log, select the parameter you want to display. Single or multiple
cells/temperatures may be displayed. Logs also display BMS errors in red colour with an
additional description.

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Firmware tab
Figure 10: Firmware tab
Can be used for different purposes:
-to unlock and change the settings
-to set the communication with the connected BMS device
-operational mode of WiFi module can be set here with all the required settings
-this tab also displays the SD card information
-to update firmware of the WiFi module or BMS device.

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6. Troubleshoting
In case of troubles contact local dealer of your glider manufacturer, manufacturer of your
glider or LZ design directly.
Default settings
By pressing the factory reset button and hold it for 20 s, all device settings will be reset to
default.
WiFi MODULE
SETTING
DEFAULT
VALUE
Wi-Fi SSID
REC_BMS
Wi-Fi password
none
IP
192.168.1.184
Send address
16
Receive address
0
Log interval
10 min
Table 3: Wifi module default settings.
To establish successful communication with FES BMS, “Send address” should be set to value
6 (default value after reset is changed to 16).
Power Saving Mode
If a FES BMS device is not detected after an hour, the WiFi module enters standby mode
to reduce the power consumption. Every 2 hours it wakes up and check if device is present.
Same principle applies when a low cell voltage is detected. To wake up device, turn it OFF
and ON again manually by switching the power supply.
7. Revision history
October 2022
Initial release, user manual v1.0