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#Esp8266 arduino mini how to

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From zero to “almost pro”: Newbie trying to learn.

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#Esp8266 arduino mini how to

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Why does micro USB 2.0 have 5 pins, when the A-type only has 4?.

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Why was Mini USB deprecated in favor of Micro USB?.arduino – How to Use SFH235 IR Photodiode Correctly?.arduino – How to get +5v for loud noise, 0v for silence from Electret Microphone (or other components)?.arduino – How many individual lights can an arduino control?.arduino – Selecting a MOSFET for driving load from logic?.arduino – Do I really need resistors when controlling LEDs with Arduino?.arduino – How to get the atmega328 to run for a year on batteries?.arduino – Input impedance of Arduino Uno analog pins?.arduino – Need help calculating resistance for transistor base?.arduino – How much current can I draw from the Arduino’s pins?.arduino – Thermistor control of peltier voltage with Arduino (for DSLR chill box project)?.arduino – How to use a 12 V input on a digital Arduino pin?.arduino – Measure Lithium ion battery voltage (thus remaining capacity)?.arduino – How to properly use a relay module with JD-VCC from Arduino/Raspberry?.)… which of-course is created badly by wetware. Hardware is hard…pfff! hardware is hard because most hardware now requires software. This is the type of thing that drive programmers crazy. I just removed the type declaration which made it use the global variable as it should and all worked fine. That local variable was the one getting populated with the Battery voltage being read from the BATTERY_PIN leaving the similarly named global variable, elsewhere in my application at it’s default state of 0.0 The problem was however in line 8 below: 1: /// Ħ: int Value = analogRead(BATTERY_PIN) //read the value from the Analog PinĨ: BatteryVoltage = (Value/ResistorFactor)*ReferenceVoltage //Calculate the ratio Thanks to PeterJ for helping me confirm what I knew about which Pin to read from and also for the improved syntax. I know this is an electronics forum and I’m asking a programming question, but this is electronics. Int Value = analogRead(BatteryPin) //read the value from the Analog Pinįloat BatteryVoltage = (Value/ResistorFactor)*ReferenceVoltage //Calculate the ratio This reads 0V from my battery.Ĭonst float ReferenceVoltage = 5 //default reference on a 5-volt boardĬonst float R1 = 54350 //49200 //55K2 Ohm resisterĬonst float R2 = 32600 //31000 //32K6 Ohm resisterĬonst float ResistorFactor = 1023.0*(R2/(R1+R2)) Ĭonst int BatteryPin = A1 // V(out) of Voltage devider circuit is attached to analog pin A1 How do I refer to this pin in my program?Ī1 is: static const uint8_t A1 = 19U. I tap the 12V positive pin through a voltage devider into pin A1 (if the USB is pointing up, and the pins away from you, this is the 6th pin from thje botttom right). I have a 3Cell LiPo powering the entire thing (via the relevant regulator bringing it down to 5V). I have an Arduino ProMicro 5V 16MHz board from sparkfun.