Summary of ESM – External Serial Monitor Using Arduino
This article describes the creation of an External Serial Monitor (ESM) using an Atmel ATmega328 microcontroller, chosen for its 2KB internal SRAM needed for handling large data. The ESM features a menu for setting baud rate and controlling reading operations. The project includes a detailed circuit, a comprehensive parts list, and various Arduino sketch files handling the display, buttons, menu functions, and fonts, designed to work with an EA_DOG-S102-6 display.
Parts used in the External Serial Monitor (ESM):
- C1, C8, C10 - 100nF/50V capacitors
- C2, C3 - 22pF/50V capacitors
- C4, C5, C6 - 1µF capacitors
- C7, C9 - 47µF/16V capacitors
- D1, D2, D3, D4 - OSRAM TOPLED LED-SMD, 9 mcd, green
- Display1 - EA_DOG-S102-6 LCD display
- IC1 - ATMEGA328 (DIL28S) microcontroller
- IC3 - L7805 5V voltage regulator
- K1 - Female connector
- Q1 - 16MHz crystal oscillator
- R1, R2, R3, R4 - 100 KOhm resistors
- R5, R6, R7, R8 - 100 Ohm resistors
- R9 - 3.3 KOhm resistor
- R10 - 1 KOhm resistor
- S2, S3, S4, S5 - JTP-1230 buttons
- S6 - Slide switch
- 9V Battery
The first picture shows an example how could be it designed.
For the ESM I used an Atmel Atmega328 (based on the Arduino-Board) because it have an internal SRAM with 2KBytes. It’s necessary for the big data processing.
So you need more than 1KByte SRAM.
With the menu in the ESM you can do…
… setting the baud rate
… start and pause the reading
Step 1: Circuit
Step 2: Parts list
C2,C3 22pF/50V
C4,C5,C6 1µF
C7,C9 47µF/16V
D1,D2,D3,D4 LED-SMD OSRAM TOPLED, 9 mcd, green
Display1 EA_DOG-S102-6
IC1 ATMEGA328(DIL28S)
IC3 L7805 5V VOLTAGE CONVERTER
K1 FEMALE CONNECTOR
Q1 16MHz
R1,R2,R3,R4 100KOhm
R5,R6,R7,R8 100 Ohm
R9 3,3KOhm
R10 1KOhm
S2,S3,S4,S5 JTP-1230 BUTTON
S6 SLIDE SWITCH
9V Battery
Step 3: Arduino sketch
esm.ino
The main sketch.
vars.h
Global variables are defined here.
menu.h
The menu-functions.
buttons.h
The buttons are here defined.
programs.h
The functions behind the menu.
menu()
startSerial()
settings()
mode()
myDOG.h
Functions for the DOGS-102 display.
static void setChipSelectPin(PIN No. as const int)
static void writeByte(unsigned int)
static void Init()
static void begin()
static void drawPic(byte[8][102])
static void displayClear()
static void print(Text as char*)
static void print(Text as char*, Row as int)**
static void print(Text as char*, Col as int, Row as int)**
static void print(Number long, Col as int, Row as int)**
** Col = 0 to 102 pix, Row 0 – 7
myfont.h
Font definitions and functions.
myPic.h
The start image.
mySPI.h
The SPI function.
esm.zip8 KB