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Std EditionART ESP32 WiFi TFT Thermostat
Profile:ART ESP32 WiFi Touch TFT Clock Thermostat
License: MIT
My compliments to EasyEDA & OSHWLab & JLCPCB & LCSC for the excellent software and Service ThumbsUp!
Sorry for my Englisch, Dutch is my Mothers language.
Fabio Mastrotto, by seeing his video He got me into this trouble https://youtu.be/CM0h_ad7ETU
The Best NEST Thing ;-)
Part of SMART is ART, ART is SMART.
3d view of the PCB
https://youtu.be/dH2b9dbxTJg
3d view of the PCB https://youtu.be/dH2b9dbxTJg
Design a PCB board to connect ESP32 dev kit 38pin to 14 pin SPI Touch TFT screen
With some extra Female holes to connect other wires / PCB modules
Got my 4inch SPI Touch TFT LCD from https://nl.aliexpress.com/item/4001122632293.html
3.2inch 14pin SPI TFT Touch ili9341 = supported by TFT_eSPI library
https://www.google.com/search?q=aliexpress+SKU%3AMSP3218
http://www.lcdwiki.com/3.2inch_SPI_Module_ILI9341_SKU:MSP3218
http://www.lcdwiki.com/images/d/d4/MSP3218-size.jpg
3.5inch 14pin SPI TFT Touch ili9488 = supported by TFT_eSPI library
https://www.google.com/search?q=aliexpress+SKU%3AMSP3520
http://www.lcdwiki.com/3.5inch_SPI_Module_ILI9488_SKU:MSP3520
http://www.lcdwiki.com/images/2/20/3.5inch_SPI_Size.png
4inch 14pin SPI TFT Touch ili7796 = supported by TFT_eSPI library
https://www.google.com/search?q=aliexpress+SKU%3AMSP4021
http://www.lcdwiki.com/4.0inch_SPI_Module_ST7796
http://www.lcdwiki.com/zh/images/b/b4/4.0inch_SPI_size.png
Maybe also add a connector for
NTC Thermistor KY-013
Like the resolution of a NTC Thermistor
prefer a NTC above big steps off digital sensor (But MayBe BME280 is an good one)
ESP32 analog read example
ESP32 Note: Analog noise and fluctuences with analog read => multiread and capacitor
https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/adc.html
Not so clear for me as DIY Tinker => think they want a 0.1mf 100uf capacitor between signal and ground to damp the analog read
// ESP32 analog read test
// KY-013 NTC thermistor signal is connected to GPIO 34 (Analog ADC1_CH6)
// KY-013 NTC thermistor - is connected to 3.3V //strange but correct - to +3.3V
// KY-013 NTC thermistor + is connected to GND //strange but correct + to GND
// outputs Fahrenheit and Celcius to serial monitor
// https://oshwlab.com/l.dijkman/esp32-dev-kit-38-pin-to-spi-touch-tft
// https://github.com/ldijkman/ART-ESP32-Touch-TFT-Thermostat
// http://www.Arduino.TK
//
// https://www.google.com/search?q=3+fahrenheit+to+celsius
int ThermistorPin = 34; //gpio34
int Vo;
float R1 = 10000;
float logR2, R2, T, Tc, Tf;
float c1 = 1.009249522e-03, c2 = 2.378405444e-04, c3 = 2.019202697e-07;
float voltage = 3.3; //use 3.3volt
void setup() {
Serial.begin(115200); //serial monitor
}
void loop() {
Vo = 0;
for (int i = 0; i <= 500; i++) { // do 500 readings makes it more stable
Vo = Vo + analogRead(ThermistorPin);
}
Vo = Vo / 500; // divide result of 500 radings by 500
R2 = R1 * (4095.0 / (float)Vo - 1.0); // 4095=12bit analog read
logR2 = log(R2);
T = (1.0 / (c1 + c2 * logR2 + c3 * logR2 * logR2 * logR2));
Tc = T - 273.15;
Tf = (Tc * 9.0) / 5 + 32.0;
Serial.print("Temperature: ");
Serial.print(Tf);
Serial.print(" F; ");
Serial.print(Tc);
Serial.println(" C");
Serial.print(Tc,1); // 1 decimal?
Serial.println(" C");
delay(500);
}
Relay Module 5V Relay module KY-019
(VCC 5V. Control line can be 3.3V For ESP32) (module KY-019)
on this board the control line goes to a transistor
other boards use an optical gate wich is also good / ok
wich switches the vcc 5v coil voltage
so safe to switch with 3.3volt esp32 gpio
// ESP32 relays test KY-019 tick like a clock
// VCC = 5v
// GND
// IN from gpio 26
// https://oshwlab.com/l.dijkman/esp32-dev-kit-38-pin-to-spi-touch-tft
// https://github.com/ldijkman/ART-ESP32-Touch-TFT-Thermostat
// http://www.Arduino.TK
const int relay = 26;
void setup() {
Serial.begin(115200);
pinMode(relay, OUTPUT);
}
void loop() {
digitalWrite(relay, LOW);
Serial.println("relays off");
delay(500);
digitalWrite(relay, HIGH);
Serial.println("relays on");
delay(500);
}
Passive Buzzer module KY-006
Passive can make different tones with PWM)
// ESP32 KY-006 passive buzzer test
// https://oshwlab.com/l.dijkman/esp32-dev-kit-38-pin-to-spi-touch-tft
// https://github.com/ldijkman/ART-ESP32-Touch-TFT-Thermostat
// http://www.Arduino.TK
#include <Tone32.h> //https://github.com/lbernstone/Tone32
#define BUZZER_PIN 12 //gpio 12 signal and ground for KY-006 Passive buzzer module
#define BUZZER_CHANNEL 0
void setup() {
}
void loop() {
tone(BUZZER_PIN, NOTE_C4, 500, BUZZER_CHANNEL);
noTone(BUZZER_PIN, BUZZER_CHANNEL);
tone(BUZZER_PIN, NOTE_D4, 500, BUZZER_CHANNEL);
noTone(BUZZER_PIN, BUZZER_CHANNEL);
tone(BUZZER_PIN, NOTE_E4, 500, BUZZER_CHANNEL);
noTone(BUZZER_PIN, BUZZER_CHANNEL);
tone(BUZZER_PIN, NOTE_F4, 500, BUZZER_CHANNEL);
noTone(BUZZER_PIN, BUZZER_CHANNEL);
tone(BUZZER_PIN, NOTE_G4, 500, BUZZER_CHANNEL);
noTone(BUZZER_PIN, BUZZER_CHANNEL);
tone(BUZZER_PIN, NOTE_A4, 500, BUZZER_CHANNEL);
noTone(BUZZER_PIN, BUZZER_CHANNEL);
tone(BUZZER_PIN, NOTE_B4, 500, BUZZER_CHANNEL);
noTone(BUZZER_PIN, BUZZER_CHANNEL);
}
Add Moisture sensor DHT11 or DHT22
https://randomnerdtutorials.com/esp32-dht11-dht22-temperature-humidity-sensor-arduino-ide/
Add i2c Barometric pressure sensor BMP280-BaroMeter
from what i have read this sensor also has a temperature sensor
wth a nice resolution of 0.01 degree
BME280? https://randomnerdtutorials.com/esp32-bme280-arduino-ide-pressure-temperature-humidity/
BMP280 can only measure temperature and air pressure
BME280 can measure humidity in addition to temperature and air pressure.
also interesting a webserver with this sensor https://randomnerdtutorials.com/esp32-web-server-with-bme280-mini-weather-station/
/*********
***************************************************************
most of this code came from https://randomnerdtutorials.com
***************************************************************
changes made by luberth dijkman
For Art Thermostat, a better NEST
BME 280 Baromter Humidity and temperature sensor
ESP32 arduino ide example
https://oshwlab.com/l.dijkman
https://github.com/ldijkman/ART-ESP32-Touch-TFT-Thermostat
// http://www.Arduino.TK
i2c SDA SCL
gpio 21, gpio 22
VCC 3.3V
GND
*********/
#include <Wire.h>
#include <Adafruit_Sensor.h> // i luberth used https://github.com/adafruit/Adafruit_Sensor
#include <Adafruit_BME280.h> // i luberth used https://github.com/adafruit/Adafruit_BME280_Library
#define SEALEVELPRESSURE_HPA (1013.25)
Adafruit_BME280 bme; // I2C
void setup() {
Serial.begin(115200);
delay(500); // a delay here otherwise next line whas not recieved by terminal==to fast???
Serial.println("BME280 test");
bool status;
// default settings
// (you can also pass in a Wire library object like &Wire2)
status = bme.begin(0x76);
if (!status) {
Serial.println("Could not find a valid BME280 sensor, check wiring!");
while (1);
}
Serial.println("-- Default Test --");
Serial.println();
}
void loop() {
printValues();
delay(1000);
}
void printValues() {
Serial.print("Temperature = ");
Serial.print(bme.readTemperature());
Serial.println(" *C");
// Convert temperature to Fahrenheit
/*Serial.print("Temperature = ");
Serial.print(1.8 * bme.readTemperature() + 32);
Serial.println(" *F");*/
Serial.print("Pressure = ");
Serial.print(bme.readPressure() / 100.0F);
Serial.println(" hPa");
Serial.print("Approx. Altitude = ");
Serial.print(bme.readAltitude(SEALEVELPRESSURE_HPA));
Serial.println(" m");
Serial.print("Humidity = ");
Serial.print(bme.readHumidity());
Serial.println(" %");
Serial.println();
}
LDR adjust background TFT Brightness by ambient light
arduino ldr module KY-018
// ESP32 LDR test should work
// https://oshwlab.com/l.dijkman/esp32-dev-kit-38-pin-to-spi-touch-tft
// https://github.com/ldijkman/ART-ESP32-Touch-TFT-Thermostat
// http://www.Arduino.TK
int LDRValue=0;
byte LIGHT_SENSOR = 36; // GPIO 36 Analog Input
void setup()
{
Serial.begin(115200);
pinMode(LIGHT_SENSOR,INPUT);
}
void loop()
{
//Get the ADC values
LDRValue = analogRead(LIGHT_SENSOR);
Serial.print(LDRValue);
Serial.print(" ");
//Get brightness Percentage
double lumLevel = (LDRValue / 4095.00);
Serial.print((lumLevel * 100.00),2);
Serial.println("%");
delay(1000);
}
RealTimeClock module DS3231 (if there is no WiFi NTP time server present)
NTP Time example => https://lastminuteengineers.com/esp32-ntp-server-date-time-tutorial/
Mine NTP => https://youtu.be/m04PbIkMzjE
OhOh => i used SDA wich is Hardware gpio i2c
want to use it for RTC DS3231
solution wire.h => softwarei2c on other gpio pins
https://randomnerdtutorials.com/esp32-i2c-communication-arduino-ide/#3
// ESP32 I2C RTC DS3231 realtimeclock test
// sets the time on DS3231 from computer when progam loads
// and print inforation about time and date to serial monitor
// software i2c on other i/o = non hardware i2c
// ART ESP32Thermostat by luberth dijkman
// https://oshwlab.com/l.dijkman/esp32-dev-kit-38-pin-to-spi-touch-tft
// https://github.com/ldijkman/ART-ESP32-Touch-TFT-Thermostat
// http://www.Arduino.TK
#include <Wire.h>
#define I2C_SDA 33 //gpio33
#define I2C_SCL 32 //gpio32
#include "RTClib.h" // https://github.com/adafruit/RTClib
RTC_DS3231 rtc; // download zip from above and install library from zip
char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
void setup(void) {
Wire.begin(I2C_SDA, I2C_SCL);
Serial.begin(115200);
if (! rtc.begin()) {
Serial.println("Couldn't find RTC");
Serial.flush();
abort();
}
if (rtc.lostPower()) {
Serial.println("RTC lost power, let's set the time!");
// When time needs to be set on a new device, or after a power loss, the
// following line sets the RTC to the date & time this sketch was compiled
rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
// This line sets the RTC with an explicit date & time, for example to set
// January 21, 2014 at 3am you would call:
// rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
}
// When time needs to be re-set on a previously configured device, the
// following line sets the RTC to the date & time this sketch was compiled
// rtc.adjust(DateTime(F(__DATE__), F(__TIME__)));
// This line sets the RTC with an explicit date & time, for example to set
// January 21, 2014 at 3am you would call:
// rtc.adjust(DateTime(2014, 1, 21, 3, 0, 0));
}
void loop () {
DateTime now = rtc.now();
Serial.print(now.year(), DEC);
Serial.print('/');
Serial.print(now.month(), DEC);
Serial.print('/');
Serial.print(now.day(), DEC);
Serial.print(" (");
Serial.print(daysOfTheWeek[now.dayOfTheWeek()]);
Serial.print(") ");
Serial.print(now.hour(), DEC);
Serial.print(':');
Serial.print(now.minute(), DEC);
Serial.print(':');
Serial.print(now.second(), DEC);
Serial.println();
Serial.print("Temperature: ");
Serial.print(rtc.getTemperature());
Serial.println(" C");
Serial.println();
delay(1000);
}
image from Paul Stofregen
example image
what i want, a board to connect ESP32 to SPI TFT
example image
what i want, a board to connect ESP32 to SPI TFT
image from Paul Stofregen
https://nl.aliexpress.com/item/4000415147087.html
38pin ESP32 dev kit
Can anyone tell me the SKU number for this module => post a comment on the bottom of page?
NOTE: LEFT BOTTOM above V5 is CMD FLASH / GPIO11 not GND, yep i did it ;-(
NOTE: LEFT BOTTOM above V5 is CMD FLASH / GPIO11 not GND, yep i did it ;-(
Can anyone tell me the SKU number for this module => post a comment on the bottom of page?
38pin ESP32 dev kit
https://nl.aliexpress.com/item/4000415147087.html
NOTE: LEFT BOTTOM above V5 is CMD FLASH / GPIO11 not GND, yep i did it ;-(
Can anyone tell me the SKU number for this module => post a comment on the bottom of page?
Think this one has a better pin description not the same PCB placement of components but pinout is the same
Think this one has a better pin description not the same PCB placement of components but pinout is the same
https://dl.espressif.com/dl/schematics/esp32_devkitc_v4-sch.pdf
https://www.arduino.cc/en/software
My Arduino IDE Settings for this ESP32 38pin dev kit
Arduino IDE
https://www.arduino.cc/en/software
my arduino ide Settings for this ESP32 38pin dev kit
File => preferences => aditional board managers
http://arduino.esp8266.com/stable/package_esp8266com_index.json
https://dl.espressif.com/dl/package_esp32_index.json
File => preferences => aditional board managers
http://arduino.esp8266.com/stable/package_esp8266com_index.json
https://dl.espressif.com/dl/package_esp32_index.json
TFT_eSPI library
would like to use the pinout from
https://github.com/Bodmer/TFT_eSPI
like this TFT SPI library much
like the touch calibration process of this library much / perfect
TFT_eSPI ESP32 wroom 32 dev kit 38pin - SPI TFT ST7796 touch https://github.com/Bodmer/TFT_eSPI touch calibration
Download the ZIP from https://github.com/Bodmer/TFT_eSPI and install library from ZIP
Then you have an up to date version
File => Examples => TFT_eSPI there are a lot off examples to play with
Edit
/home/pi/Arduino/libraries/TFT_eSPI/User_Setup.h (Path willl be a bit different on a MicroSoft Windows PC)
With a text editor to meet your display and microprocessor
or include the file in arduino IDE as a TAB
Sketch => Add File
and edit the User_Setup.h in Arduino IDE to meet your hardware Specs

*
This is wat your Arduino IDE should look like, Main File with the TAB files
ART_ESP32_Thermostat_7_12_2020_ver2.ino => is the Main File
The other files are included tab files (Should be in the same Directory as Main File)
HOWTO ESP32 to SPI TFT by Xtronical https://www.youtube.com/watch?v=rq5yPJbX_uk
SPI TFT ST7796 touch
Hope i did not make any mistakes but i Solemnly Swear, sincerely honestly believe ;-) this is my pinout
Some notes on WiFi and analog ports https://microcontrollerslab.com/adc-esp32-measuring-voltage-example/
TABLE data from LCDWIKI
http://www.lcdwiki.com/3.2inch_SPI_Module_ILI9341_SKU:MSP3218
http://www.lcdwiki.com/3.5inch_SPI_Module_ILI9488_SKU:MSP3520
http://www.lcdwiki.com/4.0inch_SPI_Module_ST7796
Number | Pin label | Description | =======> | Connected to |
---|---|---|---|---|
1 | VCC | 5V or 3.3V power input | 5V according lcdwiki schematic TFT has own U1=3,3 voltage regulator wich powers TFT ic's so safe for ESP32 5VCC only for brighter backLED backled is switched by a transistor LED maybe even better to use 5V for backlight no extra load for ESP32 onboard 3.3V regulator i think the 5V is comming from USB https://dl.espressif.com/dl/schematics/esp32_devkitc_v4-sch.pdf |
|
2 | GND | Ground | GND | |
3 | CS | LCD chip select signal, low level enable | Gpio 15 | |
4 | RESET | LCD reset signal, low level reset | Gpio 4 | |
5 | DC/RS | LCD command / data selection signal, high level: command, low level: data |
Gpio 2 | |
6 | SDI(MOSI) | LCD SPI bus write data signal | Gpio 23 | |
7 | SCK | LCD SPI bus clock signal | Gpio 18 | |
8 | LED | Backlight control, high level lighting, if not controlled, connect 3.3V always bright |
3.3V or Gpio 32 | |
9 | SDO(MISO) | SPI bus read data signal, if you do not need to the read function, you can not connect it |
Not used Some Say Possible problems when SDO(MISO) connected https://github.com/Bodmer/TFT_eSPI/issues/849 |
|
The following is the touch screen signal line wiring,
Number | Pin label | Description | ======> | Connected to |
---|---|---|---|---|
10 | T_CLK | Touch SPI bus clock signal | Gpio 18 | |
11 | T_CS | Touch screen chip select signal, low level enable | Gpio 21 | |
12 | T_DIN | Touch SPI bus input | Gpio 23 | |
13 | T_DO | Touch SPI bus output | Gpio19 | |
14 | T_IRQ | Touch screen interrupt signal, low level when touch is detected |
Not used | |
some notes on WiFi and analog ports https://microcontrollerslab.com/adc-esp32-measuring-voltage-example/
Other pins based on the example code on this page | |||
---|---|---|---|
NTC Thermistor | Gpio 34 | ||
Relays | Gpio 26 | ||
Buzzer | Gpio 12 |
Other pins based on the example code on this page | |||
---|---|---|---|
I2C SDA DS3231RealTimeClock |
Gpio 33 | ||
I2C SCL DS3231RealTimeClock |
Gpio 32 | ||
Backlight brightness control LED connection on SPI Connector TF |
Gpio32 used by i2c must test another |
||
SD card not used by me
HOWTO ESP32 to SPI TFT by Xtronical https://www.youtube.com/watch?v=rq5yPJbX_uk
Silk name | Description | Connects to SPI or ESP32 | ||
---|---|---|---|---|
SD_CS | Chip Select? | https://www.youtube.com/watch?v=rq5yPJbX_uk Tell me if you have figured it out from above video I think Gpio 5 |
||
SD_MOSI | DATA IN? | To SPI header => SDI(MOSI) => Gpio 23 | ||
SD_MISO | DATA OUT? | To SPI header => T_DO => Gpio 19 | ||
SD_SCK | Clock? | To SPI header => SCK => Gpio 18 | ||
i think the pinning in the SDcard jpeg demo TFT_eSPI/examples/generic/ESP32_SDcard_jpeg/ pinning from video is different as above https://www.youtube.com/watch?v=rq5yPJbX_uk |
||||
CUT the 3.3v trace and put a jumper wire GPIO32 to LED
Possibility to dim the screen during evening/night hours on time => to save energy => Suggestion from Jo from Belgium
Bright Light up on touch? for ?? time
// ESP32 test SPI TFT backlight PWM brightnes
// PWM = Pulse Width Modulation or pulse-duration modulation
// more or less PWM creates a voltage from 0 to 3.3volt on gpio 32
// But SPI connector LED goes to a transistor on the TFT PCB wich switches the VCC wich i have connected to 5Volt
// https://oshwlab.com/l.dijkman/esp32-dev-kit-38-pin-to-spi-touch-tft
// https://github.com/ldijkman/ART-ESP32-Touch-TFT-Thermostat
// http://www.Arduino.TK
const int ledPin = 32; // corresponds to GPIO32
// connect to LED of SPI TFT display
// setting PWM properties
const int freq = 4000; // 4khz
const int ledChannel = 1; // think channel 0 is in use by buzzer
const int resolution = 8; // 8bit 0 to 255
void setup(){
// configure LED PWM functionalitites
ledcSetup(ledChannel, freq, resolution);
// attach the channel to the GPIO to be controlled
ledcAttachPin(ledPin, ledChannel);
}
void loop(){
// increase the LED brightness
for(int dutyCycle = 0; dutyCycle <= 255; dutyCycle++){
// changing the LED brightness with PWM
ledcWrite(ledChannel, dutyCycle);
delay(15);
}
// decrease the LED brightness
for(int dutyCycle = 255; dutyCycle >= 0; dutyCycle--){
// changing the LED brightness with PWM
ledcWrite(ledChannel, dutyCycle);
delay(15);
}
}
https://www.youtube.com/user/LuberthDijkman/videos
Arduino Mega Thermostat
The Best Nest Thing. ;-) The Nest Best Thing.
The Best Nest Thing. ;-) The Nest Best Thing. https://youtu.be/lny7J7KXk9w
https://github.com/Bodmer/TFT_eSPI/issues/849
Thermostat remote control html web interface test layout
test various various html input elements on different devices
be surprised by the difference
https://jsfiddle.net/luberth/b6y53cn0
https://jsfiddle.net/luberth/b6y53cn0/embedded/result/ Try it on your phone or tablet or pc in differen browsers and be surprised
Thermostat remote control html web interface test layout
test various various html input elements on different devices
be surprised by the difference
https://jsfiddle.net/luberth/b6y53cn0
https://jsfiddle.net/luberth/b6y53cn0/embedded/result/
Connect with a Phone to the ESP 32 WiFi => ART Thermostat AccesPoint (AP)
and Browse to 192.168.4.1
Then you get a html webpage to edit your WiFi RouterName and PassWord settings
Save and the ESP32 connects to your WiFi router local network
Now lookup the designated ip adress on the touch screen of ART Thermostat
Go with the browser to the ipadres in your local network
And now you can control ART Thermostat from a webpage
If you forward the ip adress in your wifirouter then you can control your ART Thermostat from anywhere in the World
ART is Smart!
WEBCONFIG by Jhon Lassen for ESP8266
liked this one for ESP8266
Has dual mode
AP=access point =direct connection to a phone and STA is network mode wifi router connected
it shows STA network ip adres when in AP=AccessPoint direct connection
and possible to do station/network connnect and accespoint connect
WIFIMANAGER by TZAPU for ESP32 https://youtu.be/m04PbIkMzjE
does not have dual mode AP+STA
does not show ip adress from STA when in AP mode
so whe have to show STA ip adress on touch screen
most people will find it not handy say hard to lookup gadered STA ip adres in wifi router manager
more will be comming in the future
i have to change the code from arduino mega 2560 to ESP32
and also change it for TFT_eSPI graphic library
BUSY WITH THE CONVERSION
ART_ESP32_Thermostat_7_12_2020.zip = https://create.arduino.cc/editor/luberth/5e47cbb4-811d-432f-84ac-8976c56a76c4/preview
i do not understand how github works but trying
github is great for the software => you can see when a file is changed
github easy 4me to upload new code
https://github.com/ldijkman/ART-ESP32-Touch-TFT-Thermostat
Latest Video https://www.youtube.com/watch?v=qNYT64CaLEI
green pixels is just for touch testing => to see if touch is at correct location
design is for a smaller screen
// ESP32 I2C RTC DS3231 realtimeclock test
If for 30 seconds screen not touched => hide the buttons
animate slide / grow screen to full screen = more space for time, date, barometer, humidity
if screen is touched show the buttons again, bit like a menubar on pc_screen hide/show
X V let color SetPoint temperature. indicate wich mode is active, eco=green auto=DutchOrange normal/continu=gray V
X V Add Cool Mode= iceBlue V
Smooth sharp text font
store / restore temperture time / week program settings in spifs file system on ESP32
X V time temp week program change times and temp on tft V
Design a case, 3D Printer
Design a PCB with all components on it
DHL Germany is CRAZY
DHL CRAZY TRACKING JLPCB Shenzhen china to hongkong to leipzig to keulen to dusseldorf to leipzig to keulen to dusseldorf to ???
DHL CRAZY TRACKING JLPCB Shenzhen china to hongkong to leipzig to keulen to dusseldorf to leipzig to keulen to dusseldorf to ???
https://easyeda.com/editor#id=|476629139fe1472188edc581f8542dac|652cf902783e44f0b4ff0ab338b8ae5d
https://youtu.be/MsuR6W-jN5M?list=PLbKMtvtYbdPMZfzGuVTdc0MWKrFvU4nsut**
Time for a break, Time for a drink...
Where is the ladder https://youtu.be/XzO9jGPtrhc

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