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Topics - renze

1
Project logs / ESP8266 Wifi information lcd




This is a little project I did in about 2 hours. It uses an LCD display I got from an old ISDN phone and shows text sent to it over WiFi.
The ESP8266 runs a webserver which shows a form that can be used to set the text. After the ESP8266 receives the text it sends the text to an Arduino using the serial port. The Arduino then shows the text on the lcd.

The biggest goal was to make the device as small as possible, by placing all the components directly on the lcd's circuit board I managed to make the circuit only a couple of millimetres higher than the height of the clips of the lcd bezel.

(The display is an Optrex dmc50652n lcd)

If anyone is interrested in the source code of the esp8266 and arduino firmware please let me know.
2
Project logs / ESP8266 relay board


Hello everyone,

I want to share my latest project with you: an ESP8266 based relay-switch board.
It's designed in eagle and uses firmware based on esphttpd (by Sprite_tm). I put the design files on Github under CC BY-SA 3.0 license.



Main webpage:
rnplus.nl/wp-content/uploads/2014/11/smartswitch_home.png
(The current version of the firmware also shows the temperature and humidity, this is an old screenshot)

Wifi settings (allows you to connect to a wifi network without reprogramming the ESP8266):



Something that I should have done differently is the way the board is programmed:
My next board will have a  reset circuit that allows automatic reset before programming and to allow for the RTC to wake the esp from deep-sleep), including a transistor to pull GPIO0 down from a usb-serial board. This board requires me to hold down the button that is connected to GPIO0 and remove and reapply power before programming. Since the software (esptool) I use to upload the firmware is bugged I need to do this 3 times in a row to upload the (3 parts of the) firmware...

My website:
http://http://www.rnplus.nl/domotics/esp8266-relay-board/

Github link:
http://http://www.github.com/rnplus/ESP8266-relay-board-hardware

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