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Project web site: http://www.clearskyinstitute.com/ham/HamClock


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ESPHamClock parts list and wiring.

EP = https://www.adafruit.com/products/2821     ESP HUZZAH feather
RA = https://www.adafruit.com/products/1590     RA8875 Display controller
BM = https://www.adafruit.com/products/2652     BME280 Temperature, Humidity Pressure sensor
PC = https://www.adafruit.com/product/161       CdS Photocell

other hardware:

https://www.adafruit.com/products/2354          7" Color TFT with touch screen
https://www.adafruit.com/products/2098          FPC cable extension


Wiring summary:

EP_SCK    RA_SCK
EP_MO     RA_MOSI
EP_MI     RA_MISO
EP_2      RA_CS
EP_15     KX3 RX
EP_16     RA_RST
EP_USB    RA_VIN

Optional sensor pack:

EP_SCL    BM_SCK
EP_SDA    BM_SDI
EP_3V     BM_VIN

Optional photocell:

EP_ADC    PC_1, 330k
EP_GND    PC_2
EP_3V     330k

Connect all GNDs together




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To use a 9" ER-TFTM090-2 from buydisplay.com:

Purchase options:
[ ] Pin header 4 wire SPI
[ ] VDD 5 V
[ ] Touch panel 9" resistive
[ ] Micro SD - none
[ ] Font chip - none

EP_SCK       8 =  SCLK
EP_MO        7 =  SDI
EP_MI        6 =  SDO
EP_2         5 =  CS
EP_16        11 = Reset
EP_USB       3, 4, 37, 38 = 5V
EP_GND       1, 2, 13, 31, 39, 40 = Ground


Touch display requires nearly perfect power supply.



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To use Adafruit ESP Huzzah breakout: https://www.adafruit.com/products/2471

Breakout      9" TFT                7" TFT

16            11 = Reset            RA_RST
2 = Blu LED   5  = CS               RA_CS
12 = MI       6  = SDO              RA_MISO
13 = MO       7  = SDI              RA_MOSI
14 = SCK      8  = SCLK             RA_SCK
15            14 = Backlight        N/C
Vbat          3, 4, 37, 38          RA_VIN       5 V supply
GND           1, 2, 13, 31, 39, 40  RA_GND       supply ground

Sensor:

5             BM_SCK
4             BM_SDI
3V            BM_VIN

Photocell:

A0            PC_1, 330k
GND           PC_2
Vbat          330k


Note: To program the Huzzah breakout:
  1. Attach the 6 pin programming cable
  2. Enable programming mode: Hold GPIO0, click Reset, release GPIO0 then red LED should be on dim
  3. Proceed with programming (blue LED flickers while loading)
  4. After programming is complete, click Reset
  5. Unplug the programming cable if not needed for Serial


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To build a desktop version for linux or macOS, type: make help and pick a good size.

to autostart on pi desktop: 
    mkdir -p ~/.config/autostart
    cp hamclock.desktop ~/.config/autostart
    adjust Exec to match name built above if needed

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