added stuff from my pc

Initial_email/initial_email_DEMO.txt

+Beste Erik, 
+
+Een tijd terug zijn wij van de Steele group (QN) bij jullie langs geweest voor het solderen en monteren van onze microwave switchbox (zie bijlage 1 & 2). 
+Momenteel zijn wij bezig deze te vernieuwen om aan te kunnen sturen via een Arduino Nano vanaf een PC. Wij hopen in deze versie de knoppen te vervangen met MOSFETs + Arduino en hebben het volgende bedacht, zie bijlage 3, waar we nog wat vragen over hebben. Wij hopen dat jij ons hierover advies kan geven en het eventueel kan monteren voor ons wanneer alle onderdelen binnen zijn. 
+
+ 
+Het idee is, zoals te zien is in de bijlage, om P-channel MOSFETs te gebruiken om onze microwave switch aan te sturen. Welke P-channel MOSFETs zouden wij moeten bestellen hiervoor?
+Wij verwachten 28V en  20-80 mA te moeten sturen naar onze switch.
+MOSFETs + Arduino moeten de stroom doorvoeren via een Fischer kabel naar onze switch. 
+Omdat de switch bestaat uit spoelen dachten wij dat het verstandig is om een diode te plaasten om een voltage peak te verkomen. Welke diode zou hiervoor handig zijn?
+Denk je dat dit circuit het mogelijk maakt om ons doel te behalen of moeten er aanpassen aangemaakt worden?
+
+Graag hopen wij dat je ons verder kunt helpen of in het ander geval ons kunt doorverwijzen naar een collega. 
+Mochten er vragen zijn dan horen ik dat graag. 
+ 
+
+Met vriendelijke groet,
+Jasper Franse
\ No newline at end of file

USBrfswitch.txt

+//////////////////////////////////////////////////////////////////////////////////////////////////
+// USB controler for Radial RFswitch
+// By Erik van der Wiel
+// TU-delft DEMO
+// Date: 09-04-2021
+// Date lastupdate: 22-04-2021
+// Version: V1.1
+//
+// Description:
+// Can ceive a command over serialport and execute this command to drive the latching coil of a Radial RF switch.
+// Commands:
+// AT
+// CH1
+// CH2
+// CH3
+// CH4
+// CH5
+// CH6
+// CH_RESET
+//
+//
+// A command needs to be preceded bij an AT command
+// A Newline character denotes the end of a command string
+//
+// Example to switch on Channel 1 of the RFswitch:
+// AT(newline)
+// CH1(newline)
+//
+// Example to reset all switches:
+// AT(newline)
+// CH_RESET(newline)
+//
+// All command are case insensitve
+//
+//////////////////////////////////////////////////////////////////////////////////////////////////
+
+#define VERSION "V1.1"
+
+// Define pinnumbers to RF channels and reset
+#define CH1 2
+#define CH2 3
+#define CH3 4
+#define CH4 5
+#define CH5 6
+#define CH_RESET 7
+#define CH6 8
+
+// Pulsetime in ms
+#define PULSE 10
+
+const byte numChars = 32;       // Max size of text command
+char receivedChars[numChars];   // Databuffer array foor receiving cammand by serial port
+char command[numChars];         // Buffer to store command
+char lastcommand[numChars];     // kBuffer to hold previous command
+
+boolean newData = false;        //New data valid flag
+
+void setup() {
+    pinMode(LED_BUILTIN, OUTPUT); // Onboard LED instellen
+    digitalWrite(LED_BUILTIN, LOW); // Onboard LED uitzetten
+    pinMode(CH1, OUTPUT);         // Set Channelpins as output 
+    pinMode(CH2, OUTPUT);
+    pinMode(CH3, OUTPUT);
+    pinMode(CH4, OUTPUT);
+    pinMode(CH5, OUTPUT);
+    pinMode(CH_RESET, OUTPUT);
+    
+    digitalWrite(CH1, LOW);    // Set all used pins to low (0V)
+    digitalWrite(CH2, LOW);
+    digitalWrite(CH3, LOW);
+    digitalWrite(CH4, LOW);
+    digitalWrite(CH5, LOW);
+    digitalWrite(CH_RESET, LOW);
+    
+    Serial.begin(9600); // Set USB serialport to 9600bd
+    Serial.println("<Ready to receive commands @ 9600bd>"); // Report status thru serialport
+    lastcommand[0] = '\0'; // Initialize last received command
+}
+
+void loop() {
+    recvWithEndMarker(); // Wait for input on serialport
+    showNewData(); // Show received data
+    if (newData == true)
+    {
+      Docommand(); // Execute received command id newdata (command) is received
+    }  
+}
+
+void recvWithEndMarker() {
+    static byte ndx = 0;    // char 'pointer'
+    char endMarker = '\n';  // newline charactr denotes the end of and input 
+    char rc;                // Received character
+   
+    while (Serial.available() > 0 && newData == false) {    //Store data while serialport is available and newdata flag is false
+        rc = Serial.read();  
+
+        if (rc != endMarker) {                              // if  no endmarker (newline) is reveived store character
+            receivedChars[ndx] = toupper(rc);               // Set all reveice characters to uppercase to make input not casesensitive
+            ndx++;
+            if (ndx >= numChars) {                          // Make sure not more then numChars (32) are put into the buffer
+                ndx = numChars - 1;
+            }
+        }
+        else {                                              // end marker received
+            receivedChars[ndx] = '\0';                      // terminate the received string
+            ndx = 0;                                        // reset charakter counter
+            newData = true;                                 // 'raise' newdataflag to indicate there is newdata in the buffer
+        }
+    }
+}
+
+
+// Send the received data to the serialport for monitoring
+void showNewData() {
+    char status[80];
+    
+    if (newData == true) {
+        memcpy(lastcommand,command,sizeof(command));          // Save the previous command
+        memcpy(command,receivedChars,sizeof(receivedChars)); // Save curruntly received command in 'command'
+        sprintf(status,"Previous command: %s, Last command: %s",lastcommand,command);
+        Serial.println(status);
+    }
+}
+
+// Execute the received command
+// A channel will pulse high for 15ms which should be sufficient to set the latch relay in the RF switch, only 10ms should be required
+// Although the hardware will prefend the output fron being high for to long it's best practice NOT to keep the output high
+// A constant voltage on the relay will probably damage the coil in the RFswitch
+void Docommand(){
+ // The received command will only be executed when the previous command was "AT" (attention) to prefend inadvertend commands from being executed
+  if (strcmp(lastcommand, "AT") == 0){
+     if (strcmp(command, "CH1") == 0){
+        digitalWrite(CH1, HIGH);
+        delay(PULSE);
+        digitalWrite(CH1, LOW);
+     }
+     else if (strcmp(command, "CH2") == 0){
+        digitalWrite(CH2, HIGH);
+        delay(PULSE);
+        digitalWrite(CH2, LOW);  
+     }
+     else if (strcmp(command, "CH3") == 0){
+        digitalWrite(CH3, HIGH);
+        delay(PULSE);
+        digitalWrite(CH3, LOW);
+     }  
+     else if (strcmp(command, "CH4") == 0){
+        digitalWrite(CH4, HIGH);
+        delay(PULSE);
+        digitalWrite(CH4, LOW);
+     }  
+     else if (strcmp(command, "CH5") == 0){
+        digitalWrite(CH5, HIGH);
+        delay(PULSE);
+        digitalWrite(CH5, LOW);
+     }
+     else if (strcmp(command, "CH6") == 0){
+        digitalWrite(CH6, HIGH);
+        delay(PULSE);
+        digitalWrite(CH6, LOW);
+     }  
+     else if (strcmp(command, "CH_RESET") == 0){
+        digitalWrite(CH_RESET, HIGH);
+        delay(PULSE);
+        digitalWrite(CH_RESET, LOW);
+     }
+     else if (strcmp(command, "VERSION") == 0){
+      Serial.println(VERSION);
+     }
+          
+  }
+  newData = false; // reset newdata flag to indicate receive buffer is 'dirty' and can be overwriten
+}
\ No newline at end of file

USBrfswitch/USBrfswitch.ino

+//////////////////////////////////////////////////////////////////////////////////////////////////
+// USB controler for Radial RFswitch
+// By Erik van der Wiel
+// TU-delft DEMO
+// Date: 09-04-2021
+// Date lastupdate: 22-04-2021
+// Version: V1.1
+//
+// Description:
+// Can ceive a command over serialport and execute this command to drive the latching coil of a Radial RF switch.
+// Commands:
+// AT
+// CH1
+// CH2
+// CH3
+// CH4
+// CH5
+// CH6
+// CH_RESET
+//
+//
+// A command needs to be preceded bij an AT command
+// A Newline character denotes the end of a command string
+//
+// Example to switch on Channel 1 of the RFswitch:
+// AT(newline)
+// CH1(newline)
+//
+// Example to reset all switches:
+// AT(newline)
+// CH_RESET(newline)
+//
+// All command are case insensitve
+//
+//////////////////////////////////////////////////////////////////////////////////////////////////
+
+#define VERSION "V1.1"
+
+// Define pinnumbers to RF channels and reset
+#define CH1 2
+#define CH2 3
+#define CH3 4
+#define CH4 5
+#define CH5 6
+#define CH_RESET 7
+#define CH6 8
+
+// Pulsetime in ms
+#define PULSE 10
+
+const byte numChars = 32;       // Max size of text command
+char receivedChars[numChars];   // Databuffer array foor receiving cammand by serial port
+char command[numChars];         // Buffer to store command
+char lastcommand[numChars];     // kBuffer to hold previous command
+
+boolean newData = false;        //New data valid flag
+
+void setup() {
+    pinMode(LED_BUILTIN, OUTPUT); // Onboard LED instellen
+    digitalWrite(LED_BUILTIN, LOW); // Onboard LED uitzetten
+    pinMode(CH1, OUTPUT);         // Set Channelpins as output 
+    pinMode(CH2, OUTPUT);
+    pinMode(CH3, OUTPUT);
+    pinMode(CH4, OUTPUT);
+    pinMode(CH5, OUTPUT);
+    pinMode(CH_RESET, OUTPUT);
+    
+    digitalWrite(CH1, LOW);    // Set all used pins to low (0V)
+    digitalWrite(CH2, LOW);
+    digitalWrite(CH3, LOW);
+    digitalWrite(CH4, LOW);
+    digitalWrite(CH5, LOW);
+    digitalWrite(CH_RESET, LOW);
+    
+    Serial.begin(9600); // Set USB serialport to 9600bd
+    Serial.println("<Ready to receive commands @ 9600bd>"); // Report status thru serialport
+    lastcommand[0] = '\0'; // Initialize last received command
+}
+
+void loop() {
+    recvWithEndMarker(); // Wait for input on serialport
+    showNewData(); // Show received data
+    if (newData == true)
+    {
+      Docommand(); // Execute received command id newdata (command) is received
+    }  
+}
+
+void recvWithEndMarker() {
+    static byte ndx = 0;    // char 'pointer'
+    char endMarker = '\n';  // newline charactr denotes the end of and input 
+    char rc;                // Received character
+   
+    while (Serial.available() > 0 && newData == false) {    //Store data while serialport is available and newdata flag is false
+        rc = Serial.read();  
+
+        if (rc != endMarker) {                              // if  no endmarker (newline) is reveived store character
+            receivedChars[ndx] = toupper(rc);               // Set all reveice characters to uppercase to make input not casesensitive
+            ndx++;
+            if (ndx >= numChars) {                          // Make sure not more then numChars (32) are put into the buffer
+                ndx = numChars - 1;
+            }
+        }
+        else {                                              // end marker received
+            receivedChars[ndx] = '\0';                      // terminate the received string
+            ndx = 0;                                        // reset charakter counter
+            newData = true;                                 // 'raise' newdataflag to indicate there is newdata in the buffer
+        }
+    }
+}
+
+
+// Send the received data to the serialport for monitoring
+void showNewData() {
+    char status[80];
+    
+    if (newData == true) {
+        memcpy(lastcommand,command,sizeof(command));          // Save the previous command
+        memcpy(command,receivedChars,sizeof(receivedChars)); // Save curruntly received command in 'command'
+        sprintf(status,"Previous command: %s, Last command: %s",lastcommand,command);
+        Serial.println(status);
+    }
+}
+
+// Execute the received command
+// A channel will pulse high for 15ms which should be sufficient to set the latch relay in the RF switch, only 10ms should be required
+// Although the hardware will prefend the output fron being high for to long it's best practice NOT to keep the output high
+// A constant voltage on the relay will probably damage the coil in the RFswitch
+void Docommand(){
+ // The received command will only be executed when the previous command was "AT" (attention) to prefend inadvertend commands from being executed
+  if (strcmp(lastcommand, "AT") == 0){
+     if (strcmp(command, "CH1") == 0){
+        digitalWrite(CH1, HIGH);
+        delay(PULSE);
+        digitalWrite(CH1, LOW);
+     }
+     else if (strcmp(command, "CH2") == 0){
+        digitalWrite(CH2, HIGH);
+        delay(PULSE);
+        digitalWrite(CH2, LOW);  
+     }
+     else if (strcmp(command, "CH3") == 0){
+        digitalWrite(CH3, HIGH);
+        delay(PULSE);
+        digitalWrite(CH3, LOW);
+     }  
+     else if (strcmp(command, "CH4") == 0){
+        digitalWrite(CH4, HIGH);
+        delay(PULSE);
+        digitalWrite(CH4, LOW);
+     }  
+     else if (strcmp(command, "CH5") == 0){
+        digitalWrite(CH5, HIGH);
+        delay(PULSE);
+        digitalWrite(CH5, LOW);
+     }
+     else if (strcmp(command, "CH6") == 0){
+        digitalWrite(CH6, HIGH);
+        delay(PULSE);
+        digitalWrite(CH6, LOW);
+     }  
+     else if (strcmp(command, "CH_RESET") == 0){
+        digitalWrite(CH_RESET, HIGH);
+        delay(PULSE);
+        digitalWrite(CH_RESET, LOW);
+     }
+     else if (strcmp(command, "VERSION") == 0){
+      Serial.println(VERSION);
+     }
+          
+  }
+  newData = false; // reset newdata flag to indicate receive buffer is 'dirty' and can be overwriten
+}