Arduino code LDP0020C: Measurement 4x temperature and relative humidity (4X sensor DHT22) and show at one LED display - FreeHex!

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Nano
Uno
Mega

- 7 Segment TM1637 display: (link) 1--2--3
- DHT22 sensor: (link) 1 - 2 - 3
 
 
- PS9V/1A Power supply unit: (links) 1--2--3
misc: Wires: (link) 1--2--3 -- Resistors: (link) 1--2--3
 
Arduinos
connections (click to enlarge)
- Need additional accessories:

LDP0020C: Measurement 4x temperature and relative humidity (4X sensor DHT22) and show at one LED display - FreeHex!
The offered code enables: Temperature and relative humidity value shown on one display
Required accessories: - see above
For Arduino boards: NANO or UNO or MEGA
Arduino pins are used:
uc ATmega328p (NANO, UNO, ...): (see connections)
uc AtMega2560 (MEGA,.............): (see connections)
 
Electrical and practical notes:
Uses 9V/1A external power supply (VIN/GND) on DC plug (or external 5V/1A on 5V/GND pin).
If you want to use a longer length of the sensor connection cable, use a resistor of smaller value R1 = 2,2K
Display of the both measured value is in the form of one decimal digit.
Use specified type of 7 segments display with decimal points only (not clock dots).
S1 switch selector for temperature display in Celsius or Fahrenheit
P1 Display brightness selection potentiometer (0-7)
 
Download the FreeHEX codes below, unpack and upload to the proper Arduino board (Use a free net tool for example XLoader)
1. uc ATmega328-16MHz-5V (NANO,UNO...) LDP0020C-M328
2. uc AtMega2560 (Mega(ATMEGA2560).....) LDP0020C-M2560
Fully functional code but in hex format only! Test and use it free! If You want ArduinoIDE source code - see below.
 
ArduinoIDE source code (avaliable): Do some donation (HOME) and copy bottom line in Your Email to us (CONTACT). After successful donation You will receive ProjCode on your email soon as possible.
Need of project code: ProjCode-LDP0020C (ArduinoIDE source code)
 

User guide manual:
t1 xxx h1 xxx (temp. and humidity from Sensor1)
t2 xxx h2 xxx (temp. and humidity from Sensor2)
t3 xxx h3 xxx (temp. and humidity from Sensor3)
t4 xxx h4 xxx (temp. and humidity from Sensor4)