hydroponic-wemos

Parts list

Summary	URL
power supply 12V 1,25A	https://www.pollin.de/p/hutschienen-schaltnetzteil-meanwell-hdr-15-12-12-v-1-25-a-352109
electricity meter	https://www.pollin.de/p/wechselstromzaehler-reltech-rwzd1-mid-552954
step down converter 12V -> 5V	https://www.pollin.de/p/spannungsregler-st-l7805cv-170041
power cable	https://www.pollin.de/p/netzkabel-mit-schutzkontaktstecker-1-5-m-563230
water pump 12V	https://www.pollin.de/p/wasserpumpe-daypower-wp-3203-ip68-12-v-330060
DIN rail	https://www.amazon.de/Mitening-Montageschiene-H%C3%A4ngeschiene-Verteilerschrank-Schaltschrank/dp/B08PKSHZPZ/
distribution box	https://www.amazon.de/Kunststoffgeh%C3%A4use-Installationsgeh%C3%A4use-Industriegeh%C3%A4use-transparentem-Verteilerkasten/dp/B00BAA69FE/
terminal block	https://www.amazon.de/WayinTop-Schraubklemmen-Terminal-L%C3%B6tbare-Steckverbinder/dp/B088FDGBC7/
temperature sensor	https://www.amazon.de/AZDelivery-digitaler-Temperatursensor-Temperaturf%C3%BChler-wasserdicht/dp/B07CZ1G29V
plant box	https://www.bauhaus.info/pflanzkaesten/pflanzkasten/p/22964614
wooden plate	https://www.bauhaus.info/siebdruckplatten/siebdruckplatte-fixmass/p/22594871

Additional Hardware:

• Multiplexer PCF8574
• SSD1306 OLED Screen 128x32px
• 4 channel relay breakout board

PCB layout

• version 1: add base layout

Wemos D1 Mini

• Wemos D1 Mini Layout

OLED layout

The used OLED uses 128x32px in landscape orientation. For easier management of pixelart, the display is logically divided in 8x2 squares with 16x16px each and used for the following purposes:

X	Column 1	Column 2	Column 3	Column 4	Column 5	Column 6	Column 7	Column 8
Row 1	temp icon	empty	temp value pipe 1	temp value pipe 1 unit	pipe state icon	empty	pipe 1 countdown	pipe 1 countdown unit
Row 2	temp icon	empty	temp value pipe 2	temp value pipe 2 unit	pipe state icon	empty	pipe 2 countdown	pipe 2 countdown unit

Icons are based on the wonderful Ionicon collection.

If you want to convert your icons you can use this awesome page: image2cpp