Differences

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--- amc2022:grouph:link [2022/09/10 00:02] – gustavo001
+++ amc2022:grouph:link [2023/01/05 14:38] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 ===== Build ======
 {{ :amc2022:grouph:voltage_divider.jpeg?nolink&400 |}}
+| //**figure 5.1**// Setup showing the connections for battery voltage reading on ESP32 |
 ===== Schematics =====
 {{ :amc2022:grouph:batt_schematics.png?nolink&400 |}}
+| //**figure 5.2**// Schematic for battery voltage reading |
 ===== Code & Description ======
@@ Line 59: / Line 61: @@
   }
+*//For the conversion between the actual Analog reading to a percentage we use a mapFloat function
+*//It uses the input range from the analog sensor to produce another set of useful values
+*//float values will allows to get decimal numbers and a more accurate reading
+*//We use a the min voltage value, then max voltage value, and min percentage and max percentage
+*//Then we ask the program to give us the corresponding percentage value within the parameters
@@ Line 69: / Line 75: @@
-  if (voltage > 7.0 && voltage < 8.2) // THIS VALUES HAVE TO CHANGE ACCRODING TO SOURCE
+  if (voltage > 7.0 && voltage < 8.2)            // THIS VALUES HAVE TO CHANGE ACCOrDING TO SOURCE
   {Serial.print("Low bat");                      // USE VOLTMETER TO FIND THE ACCURATE VOLTAGE
   }
-  if (voltage <6.5)                //cut-off value is at 6V according to specification , we use 6.5V
+  if (voltage <6.5)                              //cut-off value is at 5.4V according to specification , we use 6V
   {Serial.print("Replace Battery");
   }
@@ Line 78: / Line 84: @@
+*//We have included a notification that will tell us what is going on with the voltage and overall battery status
+*//We include a parameter that will produce 2 warning signs:
+*// LOW BAT means that our battery is within 7 to 8.2V
+*// REPLACE BATTERY means voltage has dropped below 6.5V, number obtained from data sheet
 }
 }
@@ Line 85: / Line 96: @@
   return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
 }
+*//here we include the parameters and equation that will serve as the backbone for the mapFloat function above.
 void loop()
@@ Line 92: / Line 106: @@
-                                     // NO LOOP NEEDED,,, ONE VALUE WITH WARNING SHOULD BE DISPLAYED ON GRAFANA
+*// NO LOOP NEEDED,,, ONE VALUE WITH WARNING SHOULD BE DISPLAYED ON GRAFANA
@@ Line 101: / Line 115: @@
 ===== Issues & Characteristics ======
-*//The actual voltage will not be 100% accurate because the ADC pins have a non-linear
+The actual voltage will not be 100% accurate because the ADC pins have a non-linear behavior. This means according to the Figure # down below that, above a certain threshold the reading will produce equal inputs, thus we consider that from 3 to 3.3V the battery is at a 100% charge.
+Additionally we can see that the discharge behavior of the battery we are using, which is a model 6F22 is a curve that has a specific equation, we could find the curve's equation and use it to better represent the discharge values, however since we plan to upgrade our battery system we purposely used a simpler version in our code to achieve good enough results.
-<WRAP group>
+^ {{ :amc2022:grouph:9v_battery_.png?400&nolink }}  ^ {{ :amc2022:grouph:adc_behaviour.png?nolink&600 |}}  ^
-<WRAP half column>
+|  //**figure 5.3**// Graph depicting battery discharge for battery model 6F22 9v Source:https://www.mega-piles.com/im/PANASONIC-6F22-9V-CARBONE-ZINC_550.pdf                                                 | //**figure 5.4**// Graph depicting ADC voltage VS reading behavior for ESP32 micro controller. Source:https://microcontrollerslab.com/adc-esp32-measuring-voltage-example/                                                     |
-{{:amc2022:grouph:9v_battery_.png?nolink&300 |}}
-</WRAP>
-<WRAP half column>
-{{:amc2022:grouph:adc_behaviour.png?nolink&2000 |}}
-</WRAP>
-</WRAP>