From 3eecbb8812376c3f9cb58219dcd5db6435b32e77 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 15:13:41 -0500
Subject: [PATCH 01/18] added PROMPT_I2CSCAN

---
 cubesatsim/cubesatsim.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cubesatsim/cubesatsim.h b/cubesatsim/cubesatsim.h
index 9c5cae80..d5e6ee9c 100644
--- a/cubesatsim/cubesatsim.h
+++ b/cubesatsim/cubesatsim.h
@@ -128,6 +128,7 @@
 #define PROMPT_TEMP 11
 #define PROMPT_FORMAT 12
 #define PROMPT_REBOOT 13
+#define PROMPT_I2CSCAN 14
 
 #define PAYLOAD_QUERY 1
 #define PAYLOAD_RESET 2

From 0a2fc0459f2bde17ab109aa9fca11323ea85b746 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 15:18:56 -0500
Subject: [PATCH 02/18] added prompt for I2C scan

---
 cubesatsim/cubesatsim.ino | 88 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 86 insertions(+), 2 deletions(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 1a2ff53b..92f3be0b 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -4149,11 +4149,15 @@ void serial_input() {
        break;	
 		   
      case 's':
-     case 'S':
        Serial.println("Change to SSTV mode");	     
        new_mode = SSTV;
        break;	
-		   
+
+     case 'S':
+       Serial.println("I2C scan");	     
+       prompt = PROMPT_I2CSCAN;		
+       break;	
+   
      case 'i':
      case 'I':
        Serial.println("Restart CubeSatsim software");	     
@@ -4244,6 +4248,7 @@ void prompt_for_input() {
        Serial.println("f  FSK/DUV mode");	     
        Serial.println("b  BPSK mode");	     
        Serial.println("s  SSTV mode");	     
+       Serial.println("S  I2C scan");	   
        Serial.println("i  Restart");	     
        Serial.println("c  CALLSIGN");	     
        Serial.println("t  Simulated Telemetry");	     
@@ -4411,6 +4416,85 @@ void prompt_for_input() {
       else  
         Serial.println("off");
       break;	
+
+    case PROMPT_I2CSCAN:
+      Serial.print("I2C scan");
+
+/ --------------------------------------
+// i2c_scanner
+//
+// Version 1
+//    This program (or code that looks like it)
+//    can be found in many places.
+//    For example on the Arduino.cc forum.
+//    The original author is not know.
+// Version 2, Juni 2012, Using Arduino 1.0.1
+//     Adapted to be as simple as possible by Arduino.cc user Krodal
+// Version 3, Feb 26  2013
+//    V3 by louarnold
+// Version 4, March 3, 2013, Using Arduino 1.0.3
+//    by Arduino.cc user Krodal.
+//    Changes by louarnold removed.
+//    Scanning addresses changed from 0...127 to 1...119,
+//    according to the i2c scanner by Nick Gammon
+//    https://www.gammon.com.au/forum/?id=10896
+// Version 5, March 28, 2013
+//    As version 4, but address scans now to 127.
+//    A sensor seems to use address 120.
+// Version 6, November 27, 2015.
+//    Added waiting for the Leonardo serial communication.
+// 
+//
+// This sketch tests the standard 7-bit addresses
+// Devices with higher bit address might not be seen properly.
+//
+
+
+{
+  byte error, address;
+  int nDevices;
+
+  Serial.println("Scanning...");
+
+  nDevices = 0;
+  for(address = 1; address < 127; address++ ) 
+  {
+    // The i2c_scanner uses the return value of
+    // the Write.endTransmisstion to see if
+    // a device did acknowledge to the address.
+    Wire.beginTransmission(address);
+    error = Wire.endTransmission();
+
+    if (error == 0)
+    {
+      Serial.print("I2C device found at address 0x");
+      if (address<16) 
+        Serial.print("0");
+      Serial.print(address,HEX);
+      Serial.println("  !");
+
+      nDevices++;
+    }
+    else if (error==4) 
+    {
+      Serial.print("Unknown error at address 0x");
+      if (address<16) 
+        Serial.print("0");
+      Serial.println(address,HEX);
+    }    
+  }
+  if (nDevices == 0)
+    Serial.println("No I2C devices found\n");
+  else
+    Serial.println("done\n");
+
+  delay(5000);           // wait 5 seconds for next scan
+}		  
+		  
+		  
+        Serial.println("complete");
+      break;	
+		  
   }
   prompt = false;	
 }

From 19d9f8018d37433a1269c9d2719caa11dd3056b1 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 15:20:30 -0500
Subject: [PATCH 03/18] typo

---
 cubesatsim/cubesatsim.ino | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 92f3be0b..6f47d123 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -4420,7 +4420,7 @@ void prompt_for_input() {
     case PROMPT_I2CSCAN:
       Serial.print("I2C scan");
 
-/ --------------------------------------
+// --------------------------------------
 // i2c_scanner
 //
 // Version 1

From 49bb44c5f1e7a9dcb3a30e58632ea525c400f36c Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 15:27:04 -0500
Subject: [PATCH 04/18] add bus 2 scanning

---
 cubesatsim/cubesatsim.ino | 48 +++++++++++++++++++++++++++++++++------
 1 file changed, 41 insertions(+), 7 deletions(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 6f47d123..72e0e187 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -4454,7 +4454,7 @@ void prompt_for_input() {
   byte error, address;
   int nDevices;
 
-  Serial.println("Scanning...");
+  Serial.println("Scanning I2C Bus 1");
 
   nDevices = 0;
   for(address = 1; address < 127; address++ ) 
@@ -4467,7 +4467,7 @@ void prompt_for_input() {
 
     if (error == 0)
     {
-      Serial.print("I2C device found at address 0x");
+      Serial.print("I2C device found at bus 1 address 0x");
       if (address<16) 
         Serial.print("0");
       Serial.print(address,HEX);
@@ -4477,21 +4477,55 @@ void prompt_for_input() {
     }
     else if (error==4) 
     {
-      Serial.print("Unknown error at address 0x");
+      Serial.print("Unknown error at bus 1 address 0x");
       if (address<16) 
         Serial.print("0");
       Serial.println(address,HEX);
     }    
   }
   if (nDevices == 0)
-    Serial.println("No I2C devices found\n");
+    Serial.println("No I2C devices found on bus 1\n");
   else
     Serial.println("done\n");
 
   delay(5000);           // wait 5 seconds for next scan
-}		  
-		  
-		  
+	
+  Serial.println("Scanning I2C Bus 2");
+
+  nDevices = 0;
+  for(address = 1; address < 127; address++ ) 
+  {
+    // The i2c_scanner uses the return value of
+    // the Write.endTransmisstion to see if
+    // a device did acknowledge to the address.
+	  
+    Wire1.beginTransmission(address);
+    error = Wire1.endTransmission();
+
+    if (error == 0)
+    {
+      Serial.print("I2C device found at bus 2 address 0x");
+      if (address<16) 
+        Serial.print("0");
+      Serial.print(address,HEX);
+      Serial.println("  !");
+
+      nDevices++;
+    }
+    else if (error==4) 
+    {
+      Serial.print("Unknown error at bus 2 address 0x");
+      if (address<16) 
+        Serial.print("0");
+      Serial.println(address,HEX);
+    }    
+  }
+  if (nDevices == 0)
+    Serial.println("No I2C devices found on bus 2\n");
+  else
+    Serial.println("done\n");
+
+}		  	  
         Serial.println("complete");
       break;	
 		  

From 5c0f2f5c12465b4be27e9da536bec9bb20bddbae Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 15:51:02 -0500
Subject: [PATCH 05/18] short APRS packet

---
 cubesatsim/cubesatsim.ino | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 72e0e187..8f53edb1 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -463,8 +463,8 @@ void send_aprs_packet() {
   char str[1000];
   char header_str[] = "hi hi ";
   strcpy(str, header_str);	
-  strcpy(str, tlm_str);	
-  strcat(str, payload_str);
+//  strcpy(str, tlm_str);	// transmit short APRS packet with just lat lon
+//  strcat(str, payload_str);
 //  print_string(str);
 //  Serial.println(strlen(str));	
 	

From bc4782e3cbac3ce47ccb10e15481129481f332d5 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 16:02:03 -0500
Subject: [PATCH 06/18] print uptime each time

---
 cubesatsim/cubesatsim.ino | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 8f53edb1..745450fb 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -1020,6 +1020,7 @@ void get_tlm_fox() {
     memset(parities, 0, sizeof(parities));
 //    Serial.println("After memset");   
    uptime = (int)(millis() / 1000.0);	  
+   Serial.printf("Uptime: %d \n", uptime);	  
 
     h[0] = (short int) ((h[0] & 0xf8) | (id & 0x07)); // 3 bits
 //    Serial.println("After h[0]");	  

From cc3abaea1c9e5830072a8141a462e5bd4a27602a Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 16:10:42 -0500
Subject: [PATCH 07/18] run start_ina219() after ina219 problem

---
 cubesatsim/cubesatsim.ino | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 745450fb..adea6705 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2427,8 +2427,11 @@ void read_ina219()
   }
   voltage_read = false;	
 	
-  if ((millis() - read_time) > 1000)
+  if ((millis() - read_time) > 1000) {
     Serial.println("There is an I2C sensor problem");
+    start_ina219();	  
+	  
+  }
 }
 
 void read_sensors()

From 52c26bd9eb9e3805702806ae40f1342d056341ab Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 16:14:03 -0500
Subject: [PATCH 08/18] set ina219_started false

---
 cubesatsim/cubesatsim.ino | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index adea6705..4a947061 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2429,6 +2429,7 @@ void read_ina219()
 	
   if ((millis() - read_time) > 1000) {
     Serial.println("There is an I2C sensor problem");
+    ina219_started = false;	  
     start_ina219();	  
 	  
   }

From 6beaf3cf5b5389a69cc386a84f2f55e6dc35cd12 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 16:19:40 -0500
Subject: [PATCH 09/18] if I2C sensor problem, check all sensors

---
 cubesatsim/cubesatsim.ino | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 4a947061..d89ee876 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2429,8 +2429,21 @@ void read_ina219()
 	
   if ((millis() - read_time) > 1000) {
     Serial.println("There is an I2C sensor problem");
-    ina219_started = false;	  
-    start_ina219();	  
+	  
+  if (!(i2c_1 = ina219_1_0x40.begin()))  // check i2c bus 1
+    Serial.println("I2C +X sensor (bus 1 0x40) not found");
+  if (!(i2c2 = ina219_1_0x41.begin()))
+    Serial.println("I2C +Y sensor (bus 1 0x41) not found");
+  if (!(i2c3 = ina219_1_0x44.begin()))
+    Serial.println("I2C Batt sensor (bus 1 0x44) not found");
+  if (!(i2c5 = ina219_2_0x40.begin(&Wire1)))  // check i2c bus 2
+    Serial.println("I2C +Z sensor (bus 2 0x40) not found");
+  if (!(i2c6 = ina219_2_0x41.begin(&Wire1)))
+    Serial.println("I2C -X sensor (bus 2 0x41) not found");
+  if (!(i2c7 = ina219_2_0x44.begin(&Wire1)))
+    Serial.println("I2C -Y sensor (bus 2 0x44) not found");
+  if (!(i2c8 = ina219_2_0x45.begin(&Wire1)))
+    Serial.println("I2C -Z sensor (bus 2 0x45) not found");
 	  
   }
 }

From c96cf8fbea278790e5d08fdcf5bc6d3ddade2740 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 16:31:42 -0500
Subject: [PATCH 10/18] turn off sensor if longer than 1 second read

---
 cubesatsim/cubesatsim.ino | 52 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 49 insertions(+), 3 deletions(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index d89ee876..9e75fbc8 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2283,6 +2283,13 @@ void read_ina219()
     }
     voltage[PLUS_X] = loadvoltage;
     current[PLUS_X] = current_mA;
+	  
+  if ((millis() - read_time) > 1000) { 
+    i2c_1 = false;
+    Serial.println("There is a problem with bus 1 0x40");
+  }
+  millis() - read_time;	
+	  
   } else {
     voltage[PLUS_X] = 0.0;
     current[PLUS_X] = 0.0;	  
@@ -2303,6 +2310,13 @@ void read_ina219()
   }
   voltage[PLUS_Y] = loadvoltage;
   current[PLUS_Y] = current_mA;
+	  
+  if ((millis() - read_time) > 1000) { 
+    i2c2 = false;
+    Serial.println("There is a problem with bus 1 0x41");
+  }
+  millis() - read_time;	
+	  
   } else {
     voltage[PLUS_Y] = 0.0;
     current[PLUS_Y] = 0.0;	  
@@ -2340,7 +2354,12 @@ void read_ina219()
   voltage[BUS] = loadvoltage;  // since battery directly supplies, make BUS same as BAT for FoxTelem
   current[BUS] = current_mA;	
 	  
-	  
+  if ((millis() - read_time) > 1000) { 
+    i2c3 = false;
+    Serial.println("There is a problem with bus 1 0x44");
+  }
+  millis() - read_time;	
+	  	  
   } else {
     voltage[BAT] = 0.0;
     current[BAT] = 0.0;	  
@@ -2361,6 +2380,12 @@ void read_ina219()
   }
   voltage[PLUS_Z] = loadvoltage;
   current[PLUS_Z] = current_mA;
+	  
+  if ((millis() - read_time) > 1000) { 
+    i2c5 = false;
+    Serial.println("There is a problem with bus 2 0x40");
+  }
+  millis() - read_time;	  
   } else {
     voltage[PLUS_Z] = 0.0;
     current[PLUS_Z] = 0.0;	  
@@ -2381,6 +2406,13 @@ void read_ina219()
   }
   voltage[MINUS_X] = loadvoltage;
   current[MINUS_X] = current_mA;
+	  
+  if ((millis() - read_time) > 1000) { 
+    i2c6 = false;
+    Serial.println("There is a problem with bus 2 0x41");
+  }
+  millis() - read_time;	
+	  
   } else {
     voltage[MINUS_X] = 0.0;
     current[MINUS_X] = 0.0;	  
@@ -2401,6 +2433,13 @@ void read_ina219()
   }
   voltage[MINUS_Y] = loadvoltage;
   current[MINUS_Y] = current_mA;
+	  
+  if ((millis() - read_time) > 1000) { 
+    i2c7 = false;
+    Serial.println("There is a problem with bus 2 0x44");
+  }
+  millis() - read_time;	
+	  
   } else {
     voltage[MINUS_Y] = 0.0;
     current[MINUS_Y] = 0.0;	  
@@ -2421,12 +2460,19 @@ void read_ina219()
   }
   voltage[MINUS_Z] = loadvoltage;
   current[MINUS_Z] = current_mA;
+	  
+  if ((millis() - read_time) > 1000) { 
+    i2c8 = false;
+    Serial.println("There is a problem with bus 2 0x45");
+  }
+  millis() - read_time;	
+	  
   } else {
     voltage[MINUS_Z] = 0.0;
     current[MINUS_Z] = 0.0;	  
   }
   voltage_read = false;	
-	
+/*	
   if ((millis() - read_time) > 1000) {
     Serial.println("There is an I2C sensor problem");
 	  
@@ -2444,7 +2490,7 @@ void read_ina219()
     Serial.println("I2C -Y sensor (bus 2 0x44) not found");
   if (!(i2c8 = ina219_2_0x45.begin(&Wire1)))
     Serial.println("I2C -Z sensor (bus 2 0x45) not found");
-	  
+*/	  
   }
 }
 

From a75846420c62680f544b00608fe594afb3f66076 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 16:46:55 -0500
Subject: [PATCH 11/18] typo

---
 cubesatsim/cubesatsim.ino | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 9e75fbc8..1a7ffae7 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2288,7 +2288,7 @@ void read_ina219()
     i2c_1 = false;
     Serial.println("There is a problem with bus 1 0x40");
   }
-  millis() - read_time;	
+  read_time = millis();	
 	  
   } else {
     voltage[PLUS_X] = 0.0;
@@ -2315,7 +2315,7 @@ void read_ina219()
     i2c2 = false;
     Serial.println("There is a problem with bus 1 0x41");
   }
-  millis() - read_time;	
+  read_time = millis();	
 	  
   } else {
     voltage[PLUS_Y] = 0.0;
@@ -2358,7 +2358,7 @@ void read_ina219()
     i2c3 = false;
     Serial.println("There is a problem with bus 1 0x44");
   }
-  millis() - read_time;	
+  read_time = millis();	
 	  	  
   } else {
     voltage[BAT] = 0.0;
@@ -2385,7 +2385,7 @@ void read_ina219()
     i2c5 = false;
     Serial.println("There is a problem with bus 2 0x40");
   }
-  millis() - read_time;	  
+  read_time = millis();	
   } else {
     voltage[PLUS_Z] = 0.0;
     current[PLUS_Z] = 0.0;	  
@@ -2411,7 +2411,7 @@ void read_ina219()
     i2c6 = false;
     Serial.println("There is a problem with bus 2 0x41");
   }
-  millis() - read_time;	
+  read_time = millis();	
 	  
   } else {
     voltage[MINUS_X] = 0.0;
@@ -2438,7 +2438,7 @@ void read_ina219()
     i2c7 = false;
     Serial.println("There is a problem with bus 2 0x44");
   }
-  millis() - read_time;	
+  read_time = millis();	
 	  
   } else {
     voltage[MINUS_Y] = 0.0;
@@ -2465,7 +2465,7 @@ void read_ina219()
     i2c8 = false;
     Serial.println("There is a problem with bus 2 0x45");
   }
-  millis() - read_time;	
+  read_time = millis();	
 	  
   } else {
     voltage[MINUS_Z] = 0.0;

From 0870a0e6e1a8b72f64faff4dcd08c0a1ee26cc20 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 16:49:00 -0500
Subject: [PATCH 12/18] typo

---
 cubesatsim/cubesatsim.ino | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 1a7ffae7..f098b60d 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2489,9 +2489,9 @@ void read_ina219()
   if (!(i2c7 = ina219_2_0x44.begin(&Wire1)))
     Serial.println("I2C -Y sensor (bus 2 0x44) not found");
   if (!(i2c8 = ina219_2_0x45.begin(&Wire1)))
-    Serial.println("I2C -Z sensor (bus 2 0x45) not found");
-*/	  
+    Serial.println("I2C -Z sensor (bus 2 0x45) not found");	  
   }
+  */
 }
 
 void read_sensors()

From 4ea4ea9c943a79011ff7abcc36f05a560db0792b Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 16:54:01 -0500
Subject: [PATCH 13/18] changed from 1000 to 100 for ms per sensor read

---
 cubesatsim/cubesatsim.ino | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index f098b60d..1e052b0e 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2284,7 +2284,7 @@ void read_ina219()
     voltage[PLUS_X] = loadvoltage;
     current[PLUS_X] = current_mA;
 	  
-  if ((millis() - read_time) > 1000) { 
+  if ((millis() - read_time) > 100) { 
     i2c_1 = false;
     Serial.println("There is a problem with bus 1 0x40");
   }
@@ -2311,7 +2311,7 @@ void read_ina219()
   voltage[PLUS_Y] = loadvoltage;
   current[PLUS_Y] = current_mA;
 	  
-  if ((millis() - read_time) > 1000) { 
+  if ((millis() - read_time) > 100) { 
     i2c2 = false;
     Serial.println("There is a problem with bus 1 0x41");
   }
@@ -2354,7 +2354,7 @@ void read_ina219()
   voltage[BUS] = loadvoltage;  // since battery directly supplies, make BUS same as BAT for FoxTelem
   current[BUS] = current_mA;	
 	  
-  if ((millis() - read_time) > 1000) { 
+  if ((millis() - read_time) > 100) { 
     i2c3 = false;
     Serial.println("There is a problem with bus 1 0x44");
   }
@@ -2381,7 +2381,7 @@ void read_ina219()
   voltage[PLUS_Z] = loadvoltage;
   current[PLUS_Z] = current_mA;
 	  
-  if ((millis() - read_time) > 1000) { 
+  if ((millis() - read_time) > 100) { 
     i2c5 = false;
     Serial.println("There is a problem with bus 2 0x40");
   }
@@ -2407,7 +2407,7 @@ void read_ina219()
   voltage[MINUS_X] = loadvoltage;
   current[MINUS_X] = current_mA;
 	  
-  if ((millis() - read_time) > 1000) { 
+  if ((millis() - read_time) > 100) { 
     i2c6 = false;
     Serial.println("There is a problem with bus 2 0x41");
   }
@@ -2434,7 +2434,7 @@ void read_ina219()
   voltage[MINUS_Y] = loadvoltage;
   current[MINUS_Y] = current_mA;
 	  
-  if ((millis() - read_time) > 1000) { 
+  if ((millis() - read_time) > 100) { 
     i2c7 = false;
     Serial.println("There is a problem with bus 2 0x44");
   }
@@ -2461,7 +2461,7 @@ void read_ina219()
   voltage[MINUS_Z] = loadvoltage;
   current[MINUS_Z] = current_mA;
 	  
-  if ((millis() - read_time) > 1000) { 
+  if ((millis() - read_time) > 100) { 
     i2c8 = false;
     Serial.println("There is a problem with bus 2 0x45");
   }

From a8ac7c9aacaa610cf98385253ce8e56b18f507b1 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 17:00:54 -0500
Subject: [PATCH 14/18] added reat_time_total

---
 cubesatsim/cubesatsim.ino | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 1e052b0e..c1693e42 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2255,7 +2255,7 @@ void test_radio()
 void read_ina219()
 {
   unsigned long read_time = millis();
-	
+  unsigned long read_time_total = millis();	
   if (voltage_read && !i2c_bus1 && !i2c_bus3)
     Serial.println("Nothing to read");
 /*	
@@ -2472,10 +2472,10 @@ void read_ina219()
     current[MINUS_Z] = 0.0;	  
   }
   voltage_read = false;	
-/*	
-  if ((millis() - read_time) > 1000) {
+	
+  if ((millis() - read_time_total) > 1000) {
     Serial.println("There is an I2C sensor problem");
-	  
+/*	  
   if (!(i2c_1 = ina219_1_0x40.begin()))  // check i2c bus 1
     Serial.println("I2C +X sensor (bus 1 0x40) not found");
   if (!(i2c2 = ina219_1_0x41.begin()))

From 3edec723752e01a4151f42ad635d48ce343ec4a0 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 17:02:01 -0500
Subject: [PATCH 15/18] typo

---
 cubesatsim/cubesatsim.ino | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index c1693e42..dc381b2a 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2475,6 +2475,7 @@ void read_ina219()
 	
   if ((millis() - read_time_total) > 1000) {
     Serial.println("There is an I2C sensor problem");
+  }	  
 /*	  
   if (!(i2c_1 = ina219_1_0x40.begin()))  // check i2c bus 1
     Serial.println("I2C +X sensor (bus 1 0x40) not found");

From 3507a7297dc667931f9ecbfefafe41be39937b58 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 17:10:07 -0500
Subject: [PATCH 16/18] added read_time for bme and mpg

---
 cubesatsim/cubesatsim.ino | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index dc381b2a..c940a370 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2645,6 +2645,7 @@ void start_payload() {
 
 void read_payload()
 {
+  unsigned long read_time = millis();	
   payload_str[0] = '\0';  // clear the payload string
 //  print_string(payload_str);	
 	
@@ -2664,8 +2665,13 @@ void read_payload()
     else
         sprintf(str, "0.0 0.0 0.0 0.0 "); 
     strcat(payload_str, str);
-//    print_string(payload_str);		  
-
+//    print_string(payload_str);
+      if ((millis() - read_time) > 500) {
+        Serial.println("There is a bme280 sensor problem");	 
+	bnePresent = false;
+      }
+      read_time = millis();
+	  
     if (mpuPresent) 	 { 
 //    print_string(payload_str);	
       mpu6050.update();
@@ -2688,8 +2694,12 @@ void read_payload()
       if (rotation > 5)
         led_set(STEM_LED_BLUE, HIGH);
       else
-        led_set(STEM_LED_BLUE, LOW);  	    
+        led_set(STEM_LED_BLUE, LOW);  	 
 	    
+      if ((millis() - read_time) > 500) {
+        Serial.println("There is an mpu6050 sensor problem");	 
+	mpuPresent = false;
+      }	    
     }   else
         sprintf(str, "MPU6050 0.0 0.0 0.0 0.0 0.0 0.0 ");     
     strcat(payload_str, str);

From a23c4a8980d8f4b37b0229be9ad528db72e891e0 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 17:12:40 -0500
Subject: [PATCH 17/18] typo

---
 cubesatsim/cubesatsim.ino | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index c940a370..fcfda0a9 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2668,7 +2668,7 @@ void read_payload()
 //    print_string(payload_str);
       if ((millis() - read_time) > 500) {
         Serial.println("There is a bme280 sensor problem");	 
-	bnePresent = false;
+	bmePresent = false;
       }
       read_time = millis();
 	  

From 175539aaf2934c8e65c174947a8ce10657b4edc3 Mon Sep 17 00:00:00 2001
From: alanbjohnston <alan.b.johnston@gmail.com>
Date: Mon, 12 Dec 2022 17:59:52 -0500
Subject: [PATCH 18/18] don't print uptime

---
 cubesatsim/cubesatsim.ino | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index fcfda0a9..c2637098 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -1020,7 +1020,7 @@ void get_tlm_fox() {
     memset(parities, 0, sizeof(parities));
 //    Serial.println("After memset");   
    uptime = (int)(millis() / 1000.0);	  
-   Serial.printf("Uptime: %d \n", uptime);	  
+//   Serial.printf("Uptime: %d \n", uptime);	  
 
     h[0] = (short int) ((h[0] & 0xf8) | (id & 0x07)); // 3 bits
 //    Serial.println("After h[0]");