How to solve the issue with incorrect date/year extract from Unix time (with ESP8266 board)

original article

    A reader of my blogs announce my this issue about wrong conversion of the date/year when extract data from Unix Time (Epoch Time). Also, the solution for this issue is simple, like here: https://github.com/arduino-libraries/NTPClient/issues/149.

I open the Serial Monitor and epochTime is ok, but conversion to date not

- 1st step: TOOLS -> BOARD -> BOARD MANAGER

- 2nd step: ssearch ESP8266

- 3th step: search 2.7.4 version

- 4th step: wait to full install a old file

- 5th step: close Arduino IDE and restart Arduino IDE

- 6th: upload the sketch

    I tested and add some feature for clasical Morphing Clock:

- Ceas NTP cu tranzitii animate si date meteo pe afisaj P5 RGB 64x32 cu ESP8266

- Ceas NTP cu tranzitii animate si date meteo pe afisaj P5 RGB 64x32 cu ESP8266 (continuare)

- Ceas NTP cu tranzitii animate si date meteo pe afisaj P5 RGB 64x32 cu ESP8266 (3)

- Ceas NTP cu tranzitii animate si date meteo pe afisaj P5 RGB 64x32 cu ESP8266 (4)

Show Temperature and Humidity as WiFi SSID with ESP8266 and DHT22 Sensor

   I use informations from article Show Temperature and Humidity as WiFi SSID with ESP8266 and HTU21D Sensor, just change sensor. Instead HTU21D, I use DHT22 (AM2302), my schematic is

   I program NodeMCU development board (work any development board with ESP8266: Lolin, Adafruit, WeMos, etc) with Arduino IDe software, using dht_custom_ssid_exp8266_1.ino sketch.
   For frogram ESP8266 as Arduino must follow steps from เพิ่มบอร์ด ESP8266 ใน Arduino IDE (or from my article named Placa NodeMcu v.0.9 programata in Arduino IDE).
  Also, you need 3 library:
- DHT
- Pstring
- Streaming
   Now, we can find Wi-Fi network with custon name (ESP8266 is in AP mode):
- on Android phone

- on PC with Windows 7

   Name of SSID will change at every 10 seconds, but best view is in Android phone (quick change).
   I made Show Temperature and Humidity as WiFi SSID with ESP8266 and DHT22 Sensor video to see how this system work:

Revival and use the Arduino ESP8266 Wifi Shield Version 1.0 by Wang Tongze

   Some time ago (2015) I bought "Arduino ESP8266 Wifi Shield Version 1.0 by Wang Tongze" without more documentation... neither now 😕 Last year, I write an article in my language with this board, because I pressed and shuffled and firmware was erased... But let's start as normal condition...

   For normal operation mode switch must be in this position:

  In first tests, I connect Rx-Tx from this shield at Arduino Mega at Rx1-Tx1 pins, for see how work...

  I upload ESP8266_mega_serialtest.ino with 112500bps instead 9600bps (board is Arduino Mega, shield witj ESP8266 is just accessory)

   I open serial monitor window and I write some AT commands:

   You cand upload various sketches with ESP8266 chip controlled by Arduino.

   

   If you play with switches as me, with this configuration

and pus ESP-RST button, firmware will be erased... and this sheild not work, is just a piese untill you reflash the ESP8266 chip.

   I use info from article ESP8266: Reflash Dance! writted by Dave Vandenbout for classic ESP8266:

  First, you must download esp8266_flasher.exe and v0.9.2.2. AT Firmware.bin files (or https://github.com/techiesms/ESP8266-Firmware-Upgrading-Files).

  Connect USB FTDI interface with 3.3V logic level as in photo

   Must push ESP-RST button and open software

  Find the COM used by USB interface

Change value in software

  Using BIN software button open files

  Using DOWNLOAD software button is write bin files in ESP8266 chip

  In software is writed procent

until is see

   Must change switch position in normal operation mode

   See ESP8266MOD shiled reflash movie, when I made exactlly as in descripription from above

PS: Original article is at http://nicuflorica.blogspot.ro/2016/09/placa-de-retea-wifi-shield-cu-esp8266mod.html 😎

WeMos D1 board (with ESP8266) as Web Switch Control with autoreconnect to wi-fi network

    I tested an (retired now) WeMos D1 development board made with ESP8266EX microcontroller. About this board I found some info at https://www.wemos.cc/product

   For easy use as other Arduino boards, is ok to see this picture:

    Last project with this board is a Web Switch Control.

    For upload a sketch like in any Arduino board must use newish Arduino IDE software from https://www.arduino.cc/en/Main/Software to have this situation:

   For this, must go to FILES -> PREFERENCES

and add http://arduino.esp8266.com/package_esp8266com_index.json adress 

(see detailed data in article Placa NodeMcu v.0.9 programata in Arduino IDE).

    After that in TOOLS -> BOARD->BOARDS MANAGER you will see

and than

   Now, Arduino IDE software is ready for verify/compile and upload the sketch.

   First, I tested a sketch found at ESP8266 Community Forum in post named GARAGE DOOR OPENER EXAMPLE V2 (SEE POST #2). This sketch is writted by JoseAngel

   This sketch made a webserver using AJAX style (static page and just some datas is changes).

   My sketch led_controlled_from_webpage.ino has some change line, but I use same password (1234), and my led is at GPIO5 (D15/SCL) and GND (I not put 220-470 ohms resistor limiter, but is more good to put). I use 8087 port, but you can change to 80.

   I made WeMos board control a led using protected webpage using Ajax movie when you can how it use and control the led:

   After I tested about one mounth, I see some problemes, when wi-fi router is disconnected and reconnect.. so, I study but I give a tip from a collaborator, Mircea Craciun, who indicate my another post from ESP8266 forum.

   Now, my sketch led_controlled_from_webpage_auto.ino made autocreconnect in wi-fi network if apear some problemes.

   I put an LED for wi-fi error at  GPIO12 (D12/MISO) and GND.

   At first start, after restart or if link between router and WeMos is broken, second led blink until link with wi-fi is ok. You can see in ESP8266 Switch control with autoreconnect to wi-fi network movie how WeMos D1 board is working.

   At http://www.esp8266.com/wiki/doku.php?id=arduino-docs I found how I can use EEPROM memory from ESP8266EX microcontroller for store the state of led (ON or OFF) and number of good clicks (just for see how work the system).

   Last sketch, led_controlled_from_webpage_auto_eeprom.ino, has this feature with stored data in EEPROM. You can see that in ESP8266 Switch control with autoreconnect to wi-fi network (2) movie

   

Bibliography:

1) ESP8266 Community Forum - http://www.esp8266.com/

2) Placa NodeMcu v.0.9 programata in Arduino IDE

3) Comanda led de pe pagina web creata cu WeMos D1 (ESP8266)

4) Comanda led de pe pagina web creata cu WeMos D1 (continuare)