Amateur radio remote aerial switching unit

1//Antenna switch control software Issue-1
2//description, antenna relay  switch controller with LCD display display using 3 wire [binary] control to switch  up to 6 remote RF relays. Requires ATmega328P-PU (Arduino Nano), 1x SPDT toggle  switch [mom-off-mom] and either I2C 16x2 or 20x4 LCD module
3//display information  and relay switch driver(s) are stored in EEPROM and recalled on power rebootA
4//Added  test for EEPROM corruption, code lines 203 204..
5//David Allen G8LHD © 22nd June  2021
6
7#include <EEPROM.h>
8#include <Wire.h> 
9#include <LiquidCrystal_I2C.h>  //library installation required from GitHub
10
11// * Download LiquidCrystal_I2C  zipped library from GitHub  https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library
12//  * install in Arduino > libraries > new folder "LiquidCrystal_I2C"
13// * After  placing in folder run Arduino IDE software, Sketch > Include Library > Add.ZIP Library...
14//  * May be necessary to reboot Arduino IDE software after library installation
15//  * Change text strings in following lines of code to your own preferences
16// *  Line56, declare lcd type, 16 x 2 line default or 20 character x 4 line alternative.
17//  * Line80, add station call sign
18// * Line131; add antenna description, NOTE fill  LCD text string statement with spaces to stop LCD overlap of text string.
19//  * Line142; add antenna description
20// * Line152; add antenna description
21//  * Line162; add antenna description
22// * Line172; add antenna description
23//  * Line182; add antenna description
24// * code lines 91 "if(page_counter <7)"  and code line 110 "page_counter= 7;" the number used reflects the highest page  number if not using all antenna ports, binary address '110' is used on last page,  all relays off.
25
26
27//-------Pins-----//
28int up = 2;        //Up button,   digital pin2, PD2 ATmega328P 28pin dip = pin4, normally open = LOW, closed =  HIGH
29int down = 3;      //Down button, digital pin3, PD3 ATmega328P 28pin dip  = pin5, normally open = LOW, closed = HIGH
30int outputA0 = 14; //A0, digital pin14,  ATmega328P 28pin dip = pin23
31int outputA1 = 15; //A1, digital pin15, ATmega328P  28pin dip = pin24
32int outputA2 = 16; //A2, digital pin16, ATmega328P 28pin dip  = pin25
33
34//----variable to move between pages----//
35int page_counter;       
36     
37//---------Storage debounce function-----//
38bool current_up = LOW;          
39bool  last_up=LOW;            
40bool last_down = LOW;
41bool current_down = LOW;
42
43void  setup() {
44
45checkpagecounterState(); //----Check last EEPROM stored page count----//
46
47pinMode(up,INPUT);         //initialize digital pin PD2 as an input.
48pinMode(down,INPUT);       //initialize  digital pin PD3 as an input.
49pinMode(outputA0,OUTPUT);  //initialize analogue  pin A0 as an output.
50pinMode(outputA1,OUTPUT);  //initialize analogue pin A1  as an output.
51pinMode(outputA2,OUTPUT);  //initialize analogue pin A2 as an output.
52
53//----Check  0x27 is correct I2C address for LCD display----//
54 
55LiquidCrystal_I2C lcd(0x27,  16, 2);       // LiquidCrystal_I2C lcd(0x27, 20, 4); // use with 4 line LCD display
56lcd.init();                               // Initialize the LCD
57lcd.backlight();                          //  turn on backlight
58lcd.clear();                              // clear display
59}
60
61//----De-bouncing  function for all buttons----//
62boolean debounce(boolean last, int pin)
63{
64boolean  current = digitalRead(pin);
65if (last != current)
66{
67delay(40);  //----40ms  delay for debounce----//
68current = digitalRead(pin);
69}
70return current;
71}
72
73void  loop() {
74
75
76LiquidCrystal_I2C lcd(0x27, 20, 4); //this is required inside  loop for lcd.functions to work
77    lcd.backlight();
78    lcd.setCursor(0,0);  //----indent one charachter, line 0----//
79    lcd.print("Gxxxx Loc xxxxxx");          //write station callsign and Maidenhead grid square locator on first line  of LCD display
80//  lcd.print("1234567812345678");    Character number guide  for 16 x 2 LCD display
81current_up = debounce(last_up, up);         //Debounce  for Up button
82current_down = debounce(last_down, down);   //Debounce for Down  button
83
84//----Page counter function to move between pages----//
85//----change  code lines 91 "if(page_counter <7)" and code line 110 "page_counter= 7;" replace  7 with highest number of pages----//
86
87//Page Up
88    if (last_up== LOW &&  current_up == HIGH){ 
89      lcd.clear();                     //When page is changed,  lcd clear to print new page   
90      if(page_counter <7){             //Page  counter never higher than 7(total of pages)
91      page_counter= page_counter  +1;   //Page up
92      
93      }
94      else{
95      page_counter= 1;                //return  to page 1
96      }
97  }
98
99    last_up = current_up;
100
101//Page Down
102    if (last_down== LOW && current_down == HIGH){
103      lcd.clear();                     //When  page is changed, lcd clear to print new page    
104      if(page_counter >1){             //Page  counter never lower than 1 (total of pages)
105      page_counter= page_counter  -1;   //Page down
106      
107      }
108      else{
109      page_counter= 7;              //----return to page 7----//
110      }
111  }
112    
113    last_down  = current_down;
114
115
116EEPROM.update(0, page_counter); //----write to ATmega328  EEPROM adress 0, page_counter variable (1-7)----//
117
118
119
120    
121//----Aerial  Switch function----//
122
123  switch (page_counter) {
124   
125    case 1:{     //Design  of home page 1
126    digitalWrite(outputA0,LOW); //----antenna port address 000,  A0 least significant bit----//
127    digitalWrite(outputA1,LOW);
128    digitalWrite(outputA2,LOW);
129    lcd.setCursor(0,1);
130    lcd.print("A 6m/2m/70c Vert");
131//  lcd.print("1234567812345678");    Character number guide for 16 x 2 LCD display
132    }
133    break;
134
135
136    case 2: { //Design of page 2 
137    digitalWrite(outputA0,HIGH); //----antenna  port address 001, A0 least significant bit----//
138    digitalWrite(outputA1,LOW);
139    digitalWrite(outputA2,LOW);
140    lcd.setCursor(0,1);  //indent one charachter,  print on line 1
141    lcd.print("B 144MHz 2m Horz");
142//  lcd.print("1234567812345678");   
143    }
144    break;
145
146    case 3: {   //Design of page 3 
147    digitalWrite(outputA0,LOW);  //----antenna port address 010, A0 least significant bit----//
148    digitalWrite(outputA1,HIGH);
149    digitalWrite(outputA2,LOW);
150    lcd.setCursor(0,1);
151    lcd.print("C  50MHz 6m Horz ");
152//  lcd.print("1234567812345678");      
153    }
154    break;
155
156    case 4: {   //Design of page 4
157    digitalWrite(outputA0,HIGH); //----antenna  port address 011, A0 least significant bit----//
158    digitalWrite(outputA1,HIGH);
159    digitalWrite(outputA2,LOW);
160    lcd.setCursor(0,1);
161    lcd.print("                ");
162//  lcd.print("1234567812345678");    
163    }
164    break;
165
166    case 5:  {   //Design of page 5
167    digitalWrite(outputA0,LOW); //----antenna port address  100, A0 least significant bit----//
168    digitalWrite(outputA1,LOW);
169    digitalWrite(outputA2,HIGH);
170    lcd.setCursor(0,1);
171    lcd.print("                "); 
172//  lcd.print("1234567812345678");    
173    }
174    break;
175
176    case 6: {   //Design of page 6
177    digitalWrite(outputA0,HIGH);  //----antenna port address 101, A0 least significant bit----//
178    digitalWrite(outputA1,LOW);
179    digitalWrite(outputA2,HIGH);
180    lcd.setCursor(0,1);
181    lcd.print("                ");
182//  lcd.print("1234567812345678");    
183    }
184    break;
185
186    case 7: {   //Design of page 7
187    digitalWrite(outputA0,LOW); //----unused  antenna port address 110, A0 least significant bit, all relays off.----//
188    digitalWrite(outputA1,HIGH);
189    digitalWrite(outputA2,HIGH);
190    lcd.setCursor(0,1);
191    lcd.print("All  relays off  ");
192//  lcd.print("1234567812345678");
193    }
194    break;
195
196  }//switch end
197
198}//1st loop end
199
200void checkpagecounterState() //----program  loop for reading EEPROM adress 0 pagecounter last stored value----//
201{
202  page_counter  = EEPROM.read(0);
203if (page_counter <1)return 1; //if eeprom value becomes corrupted  returns a page_counter value of page 1
204if (page_counter >7) return 1;
205
206}//2nd  loop end
207
208
209
210
211//end