e-Gizmo EZ HMI Reference Manual

e-Gizmo

EZ HMI Display Terminal

Technical Manual and Communication Functions Reference Manual

%+FT"Q/U

The EZ HMI (Human-Machine Interface) is a general
purpose display and input terminal designed with mi­crocontroller applications in mind. Users can display
messages and data through its LCD display, and
get alphanumeric input from users with the use of
just a few simple commands. It even features a self
contained menu driven function that allows users to
set, edit, and save to its non volatile memory data­herein referred to as Parameters, for later retrieval
and use by the user application programs.

A user interface function that carries these features
usually requires lengthy codes (it does). Now that
these functions are already built-in features of the
EZ HMI, there goes one detail you no longer need to
worry about- you can put all your programming effort
on the application project.

Figure 1. EZ HMI Display Terminal Module.

Figure 2. EZ HMI Display Terminal with LCD
display module removed. You can use a VFD
display module in place of the LCD if you want
a high brightness- high contrast display.

!"#$%&"'()*"%+,-./+0"1234"5"'(6"7.20"8/19":10;"

controller.

!"#$%&"71/;"<197=;.>3+";1"?@AB@"CD#"E10;*"

including Arduino & gizDuino

!").F+"-0+/"G'6"H5".27-;0"I"?"1-;7-;0J"7/1­F.K+0"=KK.;.12=3"-0+/"'(6
!"G.073=4"-0+/"L+2+/=;+K"81/9=;;+K"9+00=L+"

with relative ease.

!"#0+/"G.=31L"8-2<;.12"9=M+0"=<,-.0.;.12"18"

user inputted data simple.
!"C+2-"K/.F+2"N=/=9+;+/"O2;/4"8-2<;.12"=3­lows the user to enter non-volatile data for
later retrieval and use by the host MCU using
just a simple set of functions.

!"O2<1K+/"0P.;<:"=331P0"+2;/4"18"2-9+/.<"=2K"

alphanumeric data, including selected sym­bols.
!"QR"<:=/=<;+/0">4"5"3.2+0"SDG"1/"@)G"K.0­play.

!")1-/"7-0:">-;;12"M+40"-0+K".2"7=/=9+;+/"

entry and dialog mode are free to use for
other purposes in your program.

Page 1 of 16 pages

$/K-.21V".0"="/+L.0;+/+K";/=K+"9=/M"1P2+K">4";:+"
$/K-.21"&+=9W":;;7W((PPPT$/K-.21T<<

©2012 by e-Gizmo Mechatronix Central

EZ HMI Display Terminal

CONTROLS and TERMINALS

16CHARACTERSX2LINES

LCDORVFDDISPLAY

EXIT

SELECT

FUNCTIONSWITCHES

UART PORT

<ENTER

>

ROTARY ENCODERSWITCH

WITHPUSHFUNCTION

Figure 3. EZ HMI Controls and Port layout. The four push button controls and encoder

!"#$%&'()$)')*+'!&)*+(',+$"++-'./'012',3#4$5#-'63-%$#7-!')-('3!+*'(+8-+('63-%$#7-!9

EXT DCINPUT

7.5V-9VDC

AUXDIO

SW2 SW3 SW4 SW5

LCDCONTRAST

ADJUST

UART PORT POWER

Figure 4. EZ HMI showing AUX DIO port location and LCD contrast adjustment.

©2012 by e-Gizmo Mechatronix Central

N=L+"5"18"QR"7=L+0EZ HMI Display Terminal

PIN DESCRIPTION

&=>3+"QT"NQ"A"$#X"G'6

&:+"$#X.3.=/4"G.L.;=3"'27-;"6-;7-;"G'6"<=2">+"8/++34"

used for user applications. These can be controlled
and monitored using the communication functions

=0"K+0</.>+K".2"0+<;.12"YTQ5T"&:+"$#X"G'6"P1/M0"12"
B@"K.L.;=3"31L.<"3+F+30T

Pin No: C$%Z'[\ Description
1 GND Circuit Ground

5 PC4 G.L.;=3"6-;7-;"U
? NDB G.L.;=3"6-;7-;"Q
4 PC6 G.L.;=3"6-;7-;"5
B PC7 G.L.;=3"'27-;"U
6 NGU Digital Input 1

&=>3+"5T"N?"A"#$%&"N6%&

&:+"#$%&"N6%&"&XG"=2K"%XG"3.2+0"=/+""7/1F.K+K"

with a level translator that allows it to be connect

K./+<;34";1"=24":10;"<12;/133+/"P1/M.2L"P.;:"31L.<"3+F+3""
.2"?TU";1"BTU@"/=2L+T"]++").LTR";1").LT"^"81/"91/+"

details.

[1"d-97+/"12"`NQ

a.;:1-;"`NQ*"I@"7.2".0"-0+K"81/"3+F+3"#$%&"'(6"3+F+3"

translation. It must be supplied with a voltage input
+,-=3";1";:+"@<<"0-7734"18";:+"+c;+/2=3":10;"<12;/13­ler. This will ensure logic level compatibility between
the host and EZ HMI.

O[D6GO%"]a'&DE

The encoder switch is a special rotary switch that

7/1F.K+0"81/"="0.973+">-;",-.<M"P=4"18"+2;+/.2L"-0+/"

inputs. Data is generally selected by rotating the
shaft. Pushing the shaft will launch a predetermined
set of actions, which may vary according to the func­tions using it.

PUSH

ROTATE

Pin No: C$%Z'[\ Description
1 TXD #$%&"&X"G$&$"6#&N#&

5 %XG #$%&"%X"G$&$"'[N#&
? GND Ground
4 I@ #$%&"N6%&"N1P+/__

__`NQ"A"#$%&"N6aO%"]6#%DO

a.;:"`NQ".20;=33+K*";:+"I@"#$%&"

7.2"=<;"=0"IB@"71P+/".27-;"1/"

output and is used as follows:

no J1 DC input:

!"""Ob"EC'"<=2">+"71P+/+K">4"0-7734.2L"IB@";1";:+"
I@";1"\[G".27-;"18";:+"#$%&"N6%&T
!"""N1P+/"=773.+K";:/1-L:"`Q
!"""I@"=<;0"=0"="IB@"71P+/"01-/<+";:=;"41-"<=2"-0+"
;1"71P+/"1;:+/"K+F.<+0T"D-//+2;"K/=P2";:/1-L:"I@"

7.2"9-0;"21;"+c<++K"5BU9$T

Figure 5. The encoder switch provides a user intui­tive way of inputting data. Numeric and alphanumeric
inputs is possible, replacing multikey ASCII key­board.

N=L+"?"18"QR"7=L+0

©2012 by e-Gizmo Mechatronix Central

EZ HMI Display Terminal

WIRING CONFIGURATIONS

Important:"a./+"3+2L:;0"9-0;"21;"+c<++K"Q"C+;+/.

+5V

SOURCE

HOST CONTROLLER(MICROCONTROLLER)

with5VSupplyVoltage

Figure 6. UART wiring interface with a 5V logic microcontroller host
with separate power source.

+5V

TXD

RXD

GND

JUMPERINSTALLED
ONJP15VPOSITION

GND

7.5-9.0VDC
DCINPUT

HOST CONTROLLER(MICROCONTROLLER)

with5VSupplyVoltagedrawnfromEZHMI

Figure 7. The EZ HMI +5V, when routed through UART V+ by installing a
jumper at JP1 +5V position, can be used to power UART connected device,
such as the host MCU, or even wireless UART devices.

TXD

+5VINPUT

RXD

GND

JUMPERINSTALLED
ONJP15VPOSITION

7.5-9.0VDC
DCINPUT

©2012 by e-Gizmo Mechatronix Central

Page 4 of 16 pagesEZ HMI Display Terminal

+5V

SOURCE

HOST CONTROLLER(MICROCONTROLLER)

with5VSupplyVoltage

VCC

TXD

RXD

GND

JUMPERINSTALLED
ONJP15VPOSITION

GND

Figure 8. The EZ HMI, conversely, can be powered
from a +5V sourced by the host controller circuit.

VCC

HOST CONTROLLER(MICROCONTROLLER)

with3.0-3.3VSupplyVoltage

+3.0-3.3V
SOURCE

VCC

TXD

RXD

GND

GND

VCC

Figure 9. UART wiring interface to host controllers
with 3.0-3.3V working logic levels. Make sure the
jumper in JP1 is removed.

7.5-9.0VDC
DCINPUT

N=L+"B"18"QR"7=L+0

NOJUMPER!

©2012 by e-Gizmo Mechatronix Central

EZ HMI Display Terminal

Figure 10. EZ HMI Schematic Diagram

©2012 by e-Gizmo Mechatronix Central

Page 6 of 16 pagesEZ HMI Display Terminal

1. DISPLAYING MESSAGE

The LCD used in the EZ HMI has a display area

18"QR"<:=/=<;+/0"c"5"3.2+0T"a.;:";:+"-0+"18"d-0;":=38"

dozen or so functions, users can effortlessly display
messages and other info.

!")-2<;.12"ec” erases the whole content of LCD
display.

!")-2<;.12"e>” is use to set the cursor to any location
within the displayable area. This allows you to start
printing anywhere on the LCD display screen.

2. PARAMETERS AND PARAMETER ENTRY
MODE

The EZ HMI Parameter Entry Mode is a built-in func­tion that allows you to set, modify, and save to EZ
HMI non-volatile memory up to 48 data sets; we will
refer to these data sets as parameters here on. This
function will be useful for applications where param­eters need to be adjusted by the user from time to
time. Example applications includes (and not lim­ited to) temperature control, process control, timer,
instrumentation - to name just a few.

!")-2<;.12"e1f"=2K"e2” allows you to display message
on the top line and bottom line respectively. Portions
of LCD display not overwritten with the new mes­sage will remain unaffected.

!")-2<;.12"e3f"=2K"e4”, allows you to display mes-
0=L+"=0".2"e1f"=2K"e2f*"+c<+7;";:+"3.2+".0"<3+=/+K"g/0;"

of its old display before putting in the new message.

Scrolling Message

'8"41-/"9+00=L+".0";11"312L";1"g;".20.K+";:+"QR"

characters display area, you can use the scrolling
message functions to display your long messages.

]</133.2L"8/19"/.L:;";1"3+8;*"8-2<;.12"em” displays your
0</133.2L"9+00=L+"=;";:+";17"3.2+*"P:.3+"8-2<;.12"eM”

use the bottom line to display. You can display mes-

0=L+0"-7";1"h^"<:=/=<;+/0"312L"7+/"3.2+"-0.2L";:+0+"

functions.

Tip: The LCD display does not respond well with

8=0;"<:=2L.2L"K.073=4T"]</133.2L"9+00=L+"9=4"/+0-3;"

in display that appears to overlap on top of each
other, hence, may be hard to read. To minimize this,
adjust the LCD contrast until an acceptable scrolling
display is obtained. This may result in lower over-

=33"<12;/=0;T"&:.0"3.9.;=;.12"K1+0"21;"=7734";1"@)G"

displays.

Using the same function, each parameter can be
2=9+K">4";:+"-0+/"81/"+=04".K+2;.g<=;.12T"N=/=9+­ters are grouped according to the type of data it can

:13KT"&:+0+"=/+"3.0;+K".2";:+"81331P.2L";=>3+"?T

2.1 Entering Parameter Entry Mode

Parameter entry mode can be initiated by program
control (see section 4.7) or by pressing the encoder
switch push switch as follows:

5TQTQ" N-0:";:+"+2<1K+/"0P.;<:"M21>T"
5TQT5" E13K".;".2"7-0:"710.;.12"-2;.3"e$Kd-0;"N=/=9-

eter Mode” is displayed on LCD screen. This

0:1-3K";=M+"73=<+"P.;:.2"?"0+<12K0T

5TQT?" %+3+=0+";:+"+2<1K+/"7-0:"0P.;<:T

AdjustParameter

Mode

]++";:+"]+<;.12"YTQ";1"YTY"81/"91/+"K+;=.30"12";:+"

usage of the display functions

&=>3+"?T"Ob"EC'"[12"@13=;.3+"G=;="];1/=L+

Parameter No Capacity Data Type Value Range

UAQB 16 QR">.;"].L2+K"'2;+L+/ A?5hRi";1"I?5hRh
QRA?Q 16 16 bit Unsigned Integer UARBB?B
?5AYh 16 ?5">.;"].L2+K"'2;+L+/ A"5*QYh*Yi?*RYi";1"I"5*QYh*Yi?*RYh

Page 7 of 16 pages

©2012 by e-Gizmo Mechatronix Central

EZ HMI Display Terminal

PARAMETER
NUMBER

P Delay(ms)<1
Val: 120

2.2 Parameter Entry Mode display Screen

To select and display parameter value:

OPTIONAL

PARAMETER ALIAS

(SET BY USER)

PARAMETERVALUE

SELECT PARAMETER
NUMBERINDICATOR

5T5TQ" N-0:";:+"+2<1K+/"0P.;<:"=0"9=4">+"2+<+0-

0=/4"-2;.3";:+"ejf"0.L2"=77+=/0"12";:+"/.L:;-

most top line position,

5T5T5" %1;=;+";:+"+2<1K+/"0P.;<:"-2;.3";:+"K+0./+K"

parameter number is displayed.

5T5T?" &:+"7=/=9+;+/"=3.=0"=2K".;0"<-//+2;"F=3-+"=/+"

displayed.

To change parameter alias:

5*5*Y" ]+3+<;";:+"7=/=9+;+/"2-9>+/"=0".2"5T5TQA

5T5T?T

5T5TB" C19+2;=/.34"7-0:"]aB"ekf"0P.;<:T"$"<-/01/"

0:1-3K"=77+=/"=;";:+"g/0;"<:=/=<;+/"710.;.12"

of the alias.

5T5TR" %1;=;+";:+"+2<1K+/"0P.;<:"-2;.3";:+"K+0./+K"

character is displayed.

5T5Th" C19+2;=/.34"7-0:"]aB"ekf"0P.;<:T"&:+"<-/-

sor should jump to the next character.

5T5Ti" %+7+=;"?"=2K"Y"-2;.3";:+"K+0./+K"=3.=0".0"<19-

plete.

]aB

ALIASEDIT
CURSOR

§ Tips:

!"&:+"<-/01/"0P.;<:"]aY"ejf"=2K"]aB"ekf"<=2">+"
7/+00+K"8/++34";1"31<=;+";:+"<-/01/">=<M"=2K"81/;:";1"

the desired character position. Change character as
desired by rotating the encoder switch.

!"$3.=0"2=9+0"<=2";=M+"-7";1"QU"<:=/=<;+/0T

©2012 by e-Gizmo Mechatronix Central

P _<0

Val: 120

Page 8 of 16 pagesEZ HMI Display Terminal

To change/enter parameter value

5T5T^" ]+3+<;";:+"7=/=9+;+/"2-9>+/"=0"K+0</.>+K".2"

5T5TQA5T5T?T

5T5TQU" C19+2;=/.34"7-0:";:+"+2<1K+/"0P.;<:"-2;.3"

;:+"ejf"9=/M+/"=77+=/0"12";:+">1;;19"3.2+"

rightmost position.

5T5TQQ" N/+00";:+"<-/01/"710.;.12"0P.;<:"]aY"ejf"1/"

]aB"ekf";1"710.;.12";:+"<-/01/";1";:+"K+0./+K"

digit position.

5T5TQ5" %1;=;+";:+"+2<1K+/"-2;.3";:+"K+0./+K"F=3-+".0"

displayed.

To Exit Parameter Entry Mode

5T5TQ?" C19+2;=/.34"7/+00"]a5"-2;.3"e]=F+"D:=2L-

+0lf"9+00=L+"=77+=/0T"&:+"m+0([1(D=2<+3"

selection should also appear on the bottom
line.

5T5TQY" N/+00"<-/01/"0P.;<:"]aY"ejf"1/"]aB"ekf"

until the cursor coincides with the desired
response.

5T5TQB" N/+00"]a?";1"+2;+/";:+"<:1.<+"=2K"+c.;T

P MyParameter10
Val: 3726<

SW4“<”ORSW5“>”

TOMOVECURSORPOSITION

]a5""""""]a?""""""j"]aY"""""]aB"k

_

Exit Selection:

Yes – To save all changes to non-volatile

memory

No – To exit without saving to non-volatile
memory. The edited data will remain in effect
but will be reset to the last saved values once

;:+"71P+/".0"<4<3+K"6))";1"6[T

Cancel"n"%+A+2;+/"7=/=9+;+/"+K.;"91K+T

Important: The edit parameter mode exits with a

cleared LCD display. User application program must
reload the display to its previous condition upon
exiting this function. User application program can
detect this condition by using the T test function as
described in the communications section.

§ Tips:

!"&:+"212AF13=;.3+"9+91/4"<=2">+"/+P/.;;+2"-7";1"
QUU*UUU";.9+0T"
!"m1-/":10;"<12;/133+/"<=2"/+=K";:+"7=/=9+;+/"+F+2"
P:.3+".;".0">+.2L"=Kd-0;+KT"]++"0+<;.12"YTi"81/"91/+"

details.

SaveChanges?

Yes/No/Cancel

_

N=L+"^"18"QR"7=L+0

©2012 by e-Gizmo Mechatronix Central

EZ HMI Display Terminal

3. DIALOG/USER INPUT MODE

&:+"G.=31L"8-2<;.12"7/1F.K+0"=",-.<M"P=4"81/"41-/"

applications programs to collect user input data. You
<=2"3=-2<:".;"P.;:"=24"7/197;"9+00=L+"41-"3.M+*"3.9­ited only by the 16 characters the LCD can display.
It can accept numeric and alphanumeric user input
up to 14 characters in length.

The Dialog function can only be launched under a
user application program control. It has two operat-

.2L"91K+0*"91K+"U".0";:+"0.973+/"18";:+";P1*"3.9.;­.2L";:+"-0+/";1"="m+0([1(D=2<+3"/+07120+T"C1K+"Q"

allows the user to enter numeric or alphanumeric

.27-;0T"]++"0+<;.12"YT^"81/"91/+"K+;=.30T"&:.0"0+<;.12"

will discuss the function at the user interaction level
only.

3.1 Mode 0: Yes/No/Cancel response

?TQTQ" N/+00"<-/01/"0P.;<:"]aY"ejf"1/"]aB"ekf"

until the cursor coincides with the desired
response.

?TQT5" N/+00"]a?";1"0+2K";:+"0+3+<;+K"/+07120+"

and exit Dialog mode.

]a5""""""]a?""""""j"]aY"""""]aB"k

MyPrompt

Yes/No/Cancel

_

3.2 Mode 1: Numeric/Alphanumeric

In this mode, the input character set is divided into

;:/++"L/1-70";1"9=M+"9+00=L+"<19710.;.12";=0M"

easier. The active input character set selection is in­dicated by a single character on the leftmost position
of the bottom line:

" ["A" [-9>+/"=2K"]49>130
" $"A" D=7.;=3"3+;;+/0"=2K"eopqrf
" ="A" 31P+/<=0+"3+;;+/0"=2K"estuf"

?T5TQT" N/+00"]a5"/+7+=;+K34"=0"9=4">+"2+<+00=/4"

until the desired character input set is se­lected.

?T5T5T" %1;=;+";:+"+2<1K+/"0P.;<:"-2;.3";:+"K+0./+K"

character is displayed.

?T5T?" N/+00"<-/01/"0P.;<:"]aB"ekf";1"71.2;";:+"

cursor to the next character position. You can

-0+";:+"<-/01/"0P.;<:"]aY"ejf"1/"]aB"ekf"
;1"0M.7"1/"L1">=<M";1"=24"710.;.12"P.;:.2";:+"

input display area.

?T5TY" %+7+=;"0;+70"QA?"-2;.3";:+"K+0./+K".27-;".0"

completed.

?T5TB" C19+2;=/.34"7/+00"]a?";1"0+2K".27-;"9+0-

sage and exit Dialog mode

MyPrompt
NUserInput

USE<SW4ORSW5>

TOMOVECURSOR

Important: &:+"G.=31L")-2<;.12"+c.;0"P.;:"="<3+=/+K"

LCD display. User application program must reload
the display to its previous condition upon exiting this
function. User application program can detect this
condition by using the T test function as described in

0+<;.12"YTBT

1234

_

©2012 by e-Gizmo Mechatronix Central

N=L+"QU"18"QR"7=L+0EZ HMI Display Terminal

4. COMMUNICATIONS FUNCTIONS

Communications settings:

v=-K"%=;+W" ^RUU

Data: 8 Bit
Parity: none

E=2K0:=M+W" 212+

Summary of Functions

c - Clear Display

Q" A"G.073=4";1"3.2+"U"H&17"%1PJ
5" A"G.073=4";1"3.2+"Q"Hv1;;19"%1PJ
?" A"D3+=/"w"G.073=4";1"3.2+"U

4 - Clear & Display to line 1

k" A"]+;"N/.2;"];=/;"710.;.12
9" A"]</133"G.073=4";1"3.2+"U
C" A"]</133"G.073=4";1"3.2+"Q

p - Goto Edit Parameter Mode

/" A"%+=K"N=/=9+;+/0
M" A"%+=K"="Z+4"H12+"0:1;"91K+J
Z" A"%+=K"="M+4"H3+F+3"91K+J
+" A"%+=K"-0+/"+2<1K+/
O" A"a/.;+"-0+/"+2<1K+/"F=3-+
v" A"]+;"v=<M3.L:;"v/.L:;2+00"UAQ^

T - Test

G" A"G.=31L"v1c(#0+/"'27-;
]" A"]+;"$-c"6-;7-;
%" A"%+0+;"$-c"6-;7-;
'" A"%+=K"$-c"'27-;

&:+"g/0;"<:=/=<;+/"=8;+/";:+"

q]&Xr""9=/M+/".0"="0.2L3+"

<:=/=<;+/"8-2<;.12"07+<.g+/T"O=<:";/=209.00.12"9=4"
<12;=.2"d-0;"="8-2<;.12"07+<.g+/"1234*"1/"9=4"<12;=.2"
="0+/.+0"18"K=;=".2"=KK.;.12";1";:+"8-2<;.12"07+<.g+/T"

End of transmission is signaled by the qO&Xr9=/M+/T

q]&Xr and qO&Xr"=/+"K=;="7=<M+;"9=/M+/0"=2K"0:1-3K"

not be transmitted as literal string. They should be

0+2K".2";:+./"$]D''"/+7/+0+2;=;.12T"&:+"<1//+<;"P=4"

of transmitting the q]&Xr and qO&Xr"9=/M+/0"=/+"0:1P2"
in the following example:

Example 1: Clear LCD Display

Transmission Format: q]&Xrcq]&Xr

&:.0"0:1-3K">+";/=209.;;+K".2";:+./"$]D''"<1K+"/+7/+­sentation as shown in the following table:

]49>13 ]&X c ETX

Hex UcU5 UcR? UcU?

@.0-=3"v=0.<W

Correct:

" ]+/.=3QT7/.2;H<:/H5JIfcfI<:/H?JJ

" a/12LW

" ]+/.=3QT7/.2;Heq]&XrcqO&XrfJ

Line (TopRow)0
Line (BotRow)1

Important:

Communications Format

OF+/4"7=<M+;"18"K=;=";/=209.00.12"H=2K"/+07120+J"

are wrapped inside an q]&Xr"and qO&Xr"9=/M+/T"

q]&Xr"n"];=/;"18";/=209.00.12"9=/M+/*"$]D''"F=3-+""y"

UcU5

qO&Xr"n"O2K"18";/=209.00.12"9=/M+/*"$]D''"F=3-+""y"

UcU?

_

Arduino:

Correct:

" ]+/.=3TP/.;+HUcU5Jx
" ]+/.=3T7/.2;Hec”);
" ]+/.=3TP/.;+HUcU?Jx

" a/12LW

" ]+/.=3T7/.2;Heq]&XrcqO&XrfJx

Page 11 of 16 pages

©2012 by e-Gizmo Mechatronix Central

EZ HMI Display Terminal

Oc=973+"5W"G.073=4"eE+331"a1/3Kzf"12";17"3.2+

&/=209.00.12")1/9=;W"q]&Xr1E+331"a1/3KzqO&Xr
@.0-=3"v=0.<W

ASCII ]&X 1 H e l l o a o r l d z ETX
Hex UcU5 Uc?Q UcYi UcRB UcR< U<R< UcR8 Uc5U UcBh UcR8 Uch5 UcR< UcRY Uc5Q UcU?

]+/.=3QT7/.2;H<:/H5JIf1E+331"a1/3KzfI<:/H?JJ"

Arduino:

" ]+/.=3TP/.;+HUcU5Jx" " ((

q]&Xr

" ]+/.=3T7/.2;He1E+331"a1/3KzfJx"" ((QE+331"a1/3Kz
" ]+/.=3TP/.;+HUcU?Jx" " ((qO&Xr

$3;+/2=;+34*"41-"<=2"-0+";:+"D($/K-.21"e{f"17+/=;1/"
;1"0+2K";:+"$]D''"<1K+"18"q]&Xr and qO&Xr, together

with the function and data:

" ]+/.=3T7/.2;He{UU51E+331"a1/3Kz{UU?fJx"

P:+/+W"e{UU5f"y"q]&Xr*"e{UU?f"y"qO&Xr

Notice that in both example, only the q]&Xr and qO&Xr"

9=/M+/"2++K";1">+"<12F+/;+K"9=2-=334";1";:+./"$]D''"

code, for the simple reason that they have no equiv­alent printable characters. The three line implemen-

;=;.12"H312L":=2K"81/9=;J"9=4"9=M+"41-/"7/1L/=9"

longer, but is more human readable. Hence, for clar­ity, all example codes given are shown in the long

81/9=;T"a+"3+=F+".;"-7";1"41-".8"41-"P=2;";1"<1K+".;".2"

short format.

Function Description

Example (Arduino):

" ]+/.=3TP/.;+HUcU5Jx" ((STX code
" ]+/.=3T7/.2;HecfJx" ((c – Clear LCD function
" ]+/.=3TP/.;+HUcU?Jx" ((ETX code

YT5T" >"A"]+;"N/.2;.2L"];=/;"N10.;.12"

Note: This function is not available while the EZ HMI

.0".2"N=/=9+;+/"O2;/4"("OK.;"C1K+"1/"P:.3+".2"G.=31L"

mode.

)1/9=;W"

q]&Xr>nnqO&Xr

a:+/+W"
" 22"y"0;=/;"7/.2;"710.;.12*"UAQB
" " U"A"3+8;"910;"710.;.12
" " QB"n"/.L:;910;"710.;.12
" " G+8=-3;"F=3-+yU

%+07120+W"H[1;+W"a/=77+K"P.;:"q]&Xr &"qO&Xr)
" 6Z"n" %+=K4
" O%%"A""N/.2;"];=/;"710.;.12".2F=3.K

Example:

]+;"7/.2;"0;=/;"710.;.12";1"QU;:"<:=/=<;+/".2"="3.2+

4.1. c - Clear LCD

Clear LCD display

Note: This function is not available while the EZ HMI

.0".2"N=/=9+;+/"O2;/4"("OK.;"C1K+"1/"P:.3+".2"G.=31L"

mode.

)1/9=;W"" q]&XrcqO&Xr

%+07120+W"H[1;+W"a/=77+K"P.;:"q]&Xr &"qO&Xr)

" 6Z"n"%+=K4

(Arduino):

" ]+/.=3T7/.2;HUcU5Jx" ((q]&Xr
" ]+/.=3T7/.2;He>”);
" ]+/.=3T7/.2;HeQUfJx
" ]+/.=3T7/.2;HUcU?Jx" ((qO&Xr

©2012 by e-Gizmo Mechatronix Central

N=L+"Q5"18"QR"7=L+0EZ HMI Display Terminal

YT?T" N/.2;.2L(G.073=4")-2<;.120

Oc=973+"5"H$/K-.21JW"

1"n"N/.2;";1"S.2+"U"H&17"%1PJ
2"n"N/.2;";1"S.2+"Q"Hv1;;19"%1PJ
3"n"D3+=/"=2K";:+2"N/.2;"9+00=L+";1"S.2+"U
4 - Clear and then Print message to Line 1

Note: These functions are not available while the

Ob"EC'".0".2"N=/=9+;+/"O2;/4"("OK.;"C1K+"1/"P:.3+".2"

Dialog mode.

Message can contain any printable characters up
to 16 characters long. Long messages will be auto­matically truncated to 16 characters.

)-2<;.120"1 and 2 will simply write over any pre-
+c.0;.2L"9+00=L+"12"="3.2+*";=M.2L";:+"07=<+"18"1234"
;:10+"2++K+K">4";:+"3=;+0;"9+00=L+T")1/"+c=973+*".8"
41-/"7/1L/=9"K.073=4+K"e];/.2L"&:+1/4f"12"3.2+"Q">+­81/+:=2K*"=2K"41-"7/.2;"=21;:+/"9+00=L+"=0"eQ5?f*"
;:+"/+0-3;"P.33">+"eQ5?.2L"&:+1/4fT"&:.0"8+=;-/+".0"

useful for programs that need to refresh just a small
portion of the displayed message from time to time.

';":+370"/+K-<+"0</++2"/+8/+0:"|.<M+/T"

Use functions 3 and 4 if you want to erase all pre­existing message on a line before printing the new
message.

Use >"N/.2;"];=/;"N10.;.12"8-2<;.12">+81/+"<=33.2L"=24"
one of the printing functions if you want to start print­ing on any arbitrary position along the line.

)1/9=;W"" q]&Xr1wqO&Xr

a:+/+W"
" Py"-0+/"9+00=L+*"-7";1"QR"<:=/=<;+/0"312L

G.073=4"e+A\.}91f";1"3.2+"Q"2+=/"<+2;+/"710.;.12

// Set start position

" ]+/.=3TP/.;+HUcU5Jx" //STX code

// Start printing on 4th character position

" ]+/.=3T7/.2;He>”);
" ]+/.=3T7/.2;HeYfJx"
" ]+/.=3TP/.;+HUcU?Jx" //ETX

// clear line & print message

" ]+/.=3TP/.;+HUcU5Jx" " //STX code

// 4 – clear print to line 1 function

" ]+/.=3T7/.2;He4”);
" ]+/.=3T7/.2;He+A\.}91fJx" // m=e-Gizmo
" ]+/.=3TP/.;+HUcU?Jx" " //ETX

YTY" ]</133.2L"G.073=4")-2<;.120

m"n"K.073=4"="0</133.2L"9+00=L+";1"3.2+"U
M – display a scrolling message to line 1

Note: This function is not available while the EZ HMI

.0".2"N=/=9+;+/"O2;/4"("OK.;"C1K+"1/"P:.3+".2"G.=31L"

mode.

Long messages can be displayed on a line using

;:+"]</133.2L"G.073=4")-2<;.12T"C+00=L+0"-7";1"h^"

characters long can be displayed on a line.

Tips:

!"]</133.2L"9+00=L+".0"91/+"/+=K=>3+".8"7/+<+K+K">4"
QB">3=2M"07=<+0T"
!"S1P+/"SDG"<12;/=0;".8";:+"<:=/=<;+/0"=77+=/"1F+/-

lapping as they are scrolled.

Example 1 (Arduino):

G.073=4"e`?`?912f";1"3.2+"U

" ]+/.=3TP/.;+HUcU5Jx" //STX code
" ]+/.=3T7/.2;He1”); // 1 – print to line 0 function
" ]+/.=3T7/.2;He`?`?912fJx" // w
" ]+/.=3TP/.;+HUcU?Jx" //ETX

Alternatively:

" ]+/.=3T7/.2;He{UU51`?`?912{UU?fJx

N=L+"Q?"18"QR"7=L+0

)1/9=;W"" q]&XrmwqO&Xr
q]&XrMwqO&Xr

a:+/+W"
Py"-0+/"9+00=L+*"-7";1"h^"<:=/=<;+/0"312L

%+07120+W"H[1;+W"a/=77+K"P.;:"q]&Xr &"qO&Xr)
" 6Z"A"%+=K4

©2012 by e-Gizmo Mechatronix Central

EZ HMI Display Terminal

Example 1 (Arduino):

4.7. p - Edit Parameter Mode

]</133.2L"G.073=4"eN/1L/=99+/0":=F+"91/+"8-2zf";1"

line 1

" ]+/.=3TP/.;+HUcU5Jx" //STX code

// M – scrolling display to line 1 function

" ]+/.=3T7/.2;HeM”);
" ]+/.=3T7/.2;HeN/1L/=99+/0":=F+"91/+"8-2zfJx"
" ]+/.=3TP/.;+HUcU?Jx" //ETX

YTBT" T"n"&+0;"D199-2.<=;.12"S.2M

#0+";1";+0;";:+"<199-2.<=;.120"3.2M"=2K"K+;+/9.2+"

device status.

)1/9=;W"" q]&XrTqO&Xr

%+07120+W"H[1;+W"a/=77+K"P.;:"q]&Xr &"qO&Xr)
" OG'&""y"<-//+2;34".2"+K.;"91K+
" G'$"""y"<-//+2;34".2"K.=31L"91K+
" %O)""y"K.073=4"/+8/+0:"/+,-+0;"H0++"+c73=-

nation below)

" 6Z" y""%+=K4

Tip: The Parameter and Dialog function exits with

=">3=2M"SDG"0</++2T"$33"K=;="K.073=4+K"7/.1/";1";:+"
8-2<;.12"/+,-+0;"=/+"+/=0+KT"&:+"%O)"/+07120+"/+-

minds the user of this condition, and user code must
reload the LCD with the desired display. Any display

8-2<;.12"/+,-+0;"P.33"<3+=/";:+"%O)"<12K.;.12T

4.6. BA"v=<M3.L:;"v/.L;:2+00

&:+"SDG">=<M3.L:;">/.L:;2+00"<=2">+"=Kd-0;+K".2"Qi"
0;+70*"P.;:"Q"0+;;.2L".;";1";:+"K.99+0;"=2K"Q^"H=2K"UJ"

to the brightest setting.

)1/9=;W"" q]&XrBnnqO&Xr

Note: This function is not available while the EZ HMI

is in Dialog mode.

EZ HMI has a built-in function that allows you to
enter and save on its non-volatile memory up to 48

040;+9"7=/=9+;+/0"HK=;=JT"]++"0+<;.12"5"eN$%$CO­&O%]"=2K"N$%$CO&O%"O[&%m"C6GOf"81/"-0=L+"

and details.

Tips:

!"m1-"<=2"/+=K"=24"7=/=9+;+/"P:.3+".;".0">+.2L"91K.­g+K".2";:+"OK.;"N=/=9+;+/"C1K+T
!"N=/=9+;+/0"F=3-+0"=/+"+c<3-0.F+"81/"-0+/"07+<.g+K"

applications. No stored parameter value has any

.2|-+2<+"12";:+"17+/=;.12"18"Ob"EC'T

)1/9=;W"" q]&XrpqO&Xr

%+07120+W"H[1;+W"a/=77+K"P.;:"q]&Xr &"qO&Xr)

EDIT - Currently in Edit Parameter Mode

4.8. r n"%+=K"="7=/=9+;+/

Note: This function is not available while the EZ HMI
is in Dialog mode.

%+=K"="7=/=9+;+/"K=;="8/19"ObAEC'T

)1/9=;W"" q]&XrrnnqO&Xr

a:+/+W
" 22"n"N=/=9+;+/".2K+c*"UAYhT

%+07120+W"H[1;+W"a/=77+K"P.;:"q]&Xr &"qO&Xr)

parameter value

a:+/+W
" 22"n"v/.L:;2+00"3+F+3*"UAQi

%+07120+W"H[1;+W"a/=77+K"P.;:"q]&Xr &"qO&Xr)
" O%%""" "y".2F=3.K"3+F+3
" 6Z" y""%+=K4

Example (Arduino):

]+;"SDG">=<M3.L:;">/.L:;2+00";1"B

" ]+/.=3TP/.;+HUcU5Jx" //STX code
" ]+/.=3T7/.2;HeB”); // LCD Backlight function
" ]+/.=3T7/.2;HeBfJx" // nn brightness level
" ]+/.=3TP/.;+HUcU?Jx" //ETX

©2012 by e-Gizmo Mechatronix Central

Page 14 of 16 pagesEZ HMI Display Terminal

YT^T" D"n"67+2"="G.=31L"H#0+/"'27-;J

Note: This function is not available while the EZ HMI

.0".2"N=/=9+;+/"O2;/4"("OK.;"C1K+T

&:+"67+2"="G.=31L")-2<;.12"7/1F.K+0"=2"+=04"P=4"

for a user to interact with a host controller. Using this
function, the user can easily display a prompt mes­sage, and then get the user respond, which may be

="0.973+"m+0([1(D=2<+3"/+07120+*"1/"="[-9+/.<"1/"
$37:=2-9+/.<"-0+/".27-;T"]++"0+<;.12"?"eG'$S6\(
#]O%"'[N#&f"81/"-0=L+"=2K"K+;=.30T

)1/9=;W" "q]&XrDnwqO&Xr

g/0;"%+=K"Z+4"M"/+,-+0;*"0->0+,-+2;"%+=K"Z+4"k
/+,-+0;"P.33"/+;-/2"="eUf"+F+2".8";:+"=KK/+00+K"M+4"
/+9=.2+K"7/+00+KT"#0+/"9-0;"/+3+=0+";:+"M+4"=2K"
%+=K"Z+4"M"9-0;"0++";:+"M+4".2"/+3+=0+K"0;=;+">+­81/+".;"<=2"/+71/;".;";1">+".2"7/+00+K"eQf"0;=;+"=L=.2T"

This feature is useful in preventing the host control­ler from unintentionally repeating the execution of

019+";=0M".2"/+07120+";1"="M+4"<310-/+T

#0+";:+"3+F+3"91K+"Z".8"41-"P=2;";1"/+=K";:+"<-//+2;"
0;=;+"18";:+"=KK/+00+K"M+4T"&:=;".0*"=0"312L"=0";:+"
=KK/+00+K"M+4".0"7/+00+K*"%+=K"Z+4"K will report it
.2"eQf"0;=;+"=;"+F+/4"/+,-+0;T"$0"=3P=40*".8";:+"M+4".0"
21;"7/+00+K*".;"P.33">+"/+71/;+K".2"eUf"0;=;+T

a:+/+W

n – Dialog type:

" " U"n"m+0([1(D=2<+3*
" " Q"n"[-9+/.<($37:=2-9+/.<"H-7";1"QY"

characters)

w- User Prompt (16 character maximum)

%+07120+W"H[1;+W"a/=77+K"P.;:"q]&Xr &"qO&Xr)
" #0+/"+2;+/+K"2-9+/.<(=37:=2-9+/.<"K=;=

DIA - Entered Dialog mode

Example (Arduino):

D/+=;+"="G.=31L";:=;"/+;-/20"="m([(D"-0+/"/+07120+

" ]+/.=3TP/.;+HUcU5Jx" //STX code

// Dialog with Yes/No/Cancel selection

" ]+/.=3T7/.2;HeD”);
" ]+/.=3T7/.2;HeUfJx
" ]+/.=3T7/.2;He&+0;"'27-;WfJx""// “Test Input:” prompt
" ]+/.=3TP/.;+HUcU?Jx //ETX

YTQUT" k, K"A"%+=K"Z+4

k"n"%+=K"8-2<;.12"M+4"0;=;+"H12+"0:1;"91K+J
K"n"%+=K"8-2<;.12"M+4"0;=;+"H3+F+3"91K+J

Note: This function is not available while the EZ HMI

.0".2"N=/=9+;+/"O2;/4"("OK.;"C1K+"1/"P:.3+".2"G.=31L"

mode.

)1/9=;W""

q]&XrknqO&Xr

q]&XrKnqO&Xr

a:+/+W
" 2"n"Z+4"[-9>+/"
" " U"n"]a5
" " Q"n"]a?
" " 5"n]aY"ejf
" " ?"n"]aB"ekf

%+07120+W"H[1;+W"a/=77+K"P.;:"q]&Xr &"qO&Xr)
" Q"n".8"2"M+4".0"7/+00+K
" U"n"K".8"2"M+4".0"21;"7/+00+K"
" U"A"k".8"2"M+4".0"=3/+=K4"K+;+<;+K"=0"7/+00+K"

=2K"-0+/"M++7"7/+00.2L".;T

" O%%"A".2F=3.K"M+4"2-9>+/

11. e, E"A"%+=K"8/19(a/.;+";1"O2<1K+/"

Note: This function is not available while the EZ HMI

.0".2"N=/=9+;+/"O2;/4"("OK.;"C1K+"1/"P:.3+".2"G.=31L"

mode.

$"-0+/"/+L.0;+/"M++7.2L"="<174"18"+2<1K+/"F=3-+"<=2"

be read and loaded with a value by the user using
this function. The encoder value is a 16-bit signed
integer register which can assume any value with

I?5hRh(A?5hRi"/=2L+T"@=3-+"/1330";1"17710.;+"0.L2"

each time the encoder is adjusted past it minimum
and maximum value.

%+=K";:+"0;=;+"18"=24"12+"18";:+"81-/"8-2<;.120"M+40T"
&:+"M+4"0;=;+"<=2">+"/+=K".2";P1"P=40A"12+"0:1;"

mode k and level mode K.

'2"12+"0:1;"91K+*"="7/+00+K"M+4"P.33">+"|=LL+K"=0"
eQf"1234".8".;":=0">++2"K+;+<;+K"=0"21;"7/+00+K"K-/­.2L"="7/+F.1-0"%+=K"Z+4"/+,-+0;T"'2"1;:+/"P1/K0*"
P:+2+F+/"="M+4".0"7/+00+K*".;"P.33"/+;-/2"="eQf"12";:+"

N=L+"QB"18"QR"7=L+0

)1/9=;W"" q]&XreqO&Xr

q]&XrEqO&Xr

%+07120+W"H[1;+W"a/=77+K"P.;:"q]&Xr &"qO&Xr)
e"A" ].L2+K"+2<1K+/"F=3-+
E"A" 6Z

©2012 by e-Gizmo Mechatronix Central

EZ HMI Display Terminal

YTQ5T" S,R,I""Ob"EC'"$-c.3.=/4"'(6"8-2<;.120

S"n"]+;"=2"Ob"EC'"1-;7-;"HS1L.<"QJ
R"n"%+0+;"=2"Ob"EC'"1-;7-;"HS1L.<"UJ
I n"%+=K"=2"Ob"EC'".27-;

&:+"Ob"EC'":=0"=2"=-c.3.=/4"K.L.;=3"'(6"71/;"H<12­2+<;1/"NQJA"<120.0;.2L"18"?"1-;7-;"71/;0"=2K"5".27-;"

ports, that you can control and use in your target
applications.

)1/9=;W"" q]&XrSnqO&Xr
q]&XrRnqO&Xr
q]&XrInqO&Xr

a:+/+W
" 2"n"'(6"2-9>+/"
" " 6-;7-;"N1/;
" " """U"n"NDY
" " """Q"nNDB
" " """5n"NDR

Input Port

" " H"a.;:"P+=M"7-33"-7*"21/9=334"eQfJ
" " """U"n"NDh
" " """Q"n"NGU

%+07120+W"H[1;+W"a/=77+K"P.;:"q]&Xr &"qO&Xr)

S,R function

" " 6Z"A"%+=K4"
" " O%%" A'2F=3.K"'(6"2-9>+/

I function

" " U" A"" .27-;"/+=K0"31L.<"U
" " Q" A" .27-;"/+=K0"31L.<"eQf
" " O%%" A" '2F=3.K"'(6"2-9>+/

Example (Arduino):

]+;"NDB";1"31L.<"eQf

" ]+/.=3TP/.;+HUcU5Jx" //STX code
" ]+/.=3T7/.2;HeS”); // Set an output
" ]+/.=3T7/.2;HeQfJx" // output 1 = PC5
" ]+/.=3TP/.;+HUcU?Jx" //ETX

Oc=973+"H$/K-.21JW"%+=K"0;=;+"18"NDh"

" ]+/.=3TP/.;+HUcU5Jx" //STX code
" ]+/.=3T7/.2;HeI”); // Read an INPUT
" ]+/.=3T7/.2;HeUfJx" // input 0 = PC7
" ]+/.=3TP/.;+HUcU?Jx" //ETX

©2012 by e-Gizmo Mechatronix Central

Page 16 of 16 pagesEZ HMI Display Terminal