* Inspired from [http://frederickvandenbosch.be/?p=1365 here]:
[[File:raspi0-box.jpg|400px]]<br clear=both>
=== Hardware ===
==== OLED color display based on SD1331 ====
* the Oled display which will fit into decora blank [https://www.adafruit.com/products/684 at this link]
* programming the display https://media.readthedocs.org/pdf/luma-oled/latest/luma-oled.pdf[[File:lcds___displays_684_LRG.jpg|400px|thumb|left]]<br clear=both>[[Image:rpi-oled-connections_bb.png|thumb|700px|right]]
* Rudimentary bit-banging Python driver: [https://gist.github.com/HentschelT/5fa11f13832cca6e7408886f4e89d05e Gist at Github]
* Native driver package [https://github.com/rm-hull/luma.oled at Github]
** Connect display ground to Raspberry Pi ground (black wire).
** Connect display VIN to Raspberry Pi 3.3 volt (red wire).
** Connect display CS to Raspberry Pi CE0 (yellow wire).
** Connect display RST to Raspberry Pi GPIO 24 (blue wire). You can alternatively use any free digital GPIO pin for the reset pin.
** Connect display DC to Raspberry Pi GPIO 23 (cyan wire). You can alternatively use any free digital GPIO pin for the DC pin.
** Connect display CLK to Raspberry Pi SCLK (orange wire).
** Connect display Data to Raspberry Pi MOSI (purple wire).
[[File:rpi-spi-oled-ssd1331-connect.png|500px|left]]
<br clear=both>
[[File:j8header-zero.png|400px|thumb|left|pi4j gpio]][[File:pi-gpio-bcm.png|400px|thumb|BCM GPIO]]<br clear=both>
==== OLED B/W display based on SSD1306 ====
* address 0x7B
* wiring:
[[File:raspberry_pi_RaspberryPi_I2C_bb.png|400px|left]]<br clear=both>
==== Relay board ====
* [[File:Schematic-0G-00004539-Mod-Relay-x1-5V.pdf]]
==== Temp Sensor ====
* Type DS18b20
* Amazon [https://www.amazon.com/gp/product/B00KUNKR3M/ link]
=== Software ===
* install/enable luma.oled [https://luma-oled.readthedocs.io/en/latest/install.html link] + examples [https://github.com/rm-hull/luma.examples link], make sure examples run
* find font files 'concertone-regular.ttf' and 'fontawesome-webfont.ttf'
* install python oled server, use example scripts for verification
* update node-red from current version on RPi https://nodered.org/docs/hardware/raspberrypi
** check this too -> https://timchooblog.wordpress.com/2016/06/14/configuring-the-johnny-five-robotics-library-to-work-in-node-red/
* add "require:require" to the ''settings.js'' in the .node-red directory
* cd '.node-red'
* 'npm install node-red-contrib-stoptimer'
* 'npm install node-red-contrib-ds18b20-sensor'
* https://github.com/node-red/cookbook.nodered.org/wiki/How-to-backup-flows-and-related-configuration
* node-red flow for fireplace (rename to .js and import) [[:File:node-fireplace-js.doc|node-fireplace.js]]
=== Enclosure ===
* the 3d-printable decora cover: [http://www.thingiverse.com/thing:1643841/#files at thingiverse]
** Dimensions:
[[File:decoracover.jpg|400px|thumb|left]]<br clear=both>
* Buttons are [https://www.amazon.com/20pcs-Momentary-Tactile-Button-Switch/dp/B008DGA9UY/ref=pd_day0_60_2?_encoding=UTF8&pd_rd_i=B008DGA9UY&pd_rd_r=GNV66H9DW90V434T9PAN&pd_rd_w=j6naj&pd_rd_wg=jsniR&psc=1&refRID=GNV66H9DW90V434T9PAN at amazon].
[[:File:tactile push button square cap.jpg|400px]]<br clear=both>
=== Design questions ===
# recessed reset button
?
== Design Rev. 3.0 ==
[[Image:Sonoff-TH16.jpg|400px|thumb|right]]
[[Image:Sonoff-TH16-back.jpg|400px|thumb|right|backside]]
* Use Sonoff 16TH, install firmware found [https://github.com/arendst/Sonoff-Tasmota at this link]
* '''before this works, need to have emergency/offline action when network not available, otherwise nothing will shut the fireplace down if network is unavailable'''
* Schematic here: [[:File:Sonoff_TH10A(16A)_schmatic.pdf]]
* Find 5V connection for USB power supply on the board
** make sure relay works
* Enclosure:
** Either drill blank Decoray cover and 3d print a mount
** Or 3d print the whole Decora cover including mount