trykle

Water management controler

Create a local conf.h based off of conf-example.h

Setup

Install PubSub Client

On arduino ide, goto tools -> Library Search for pubsub Installed v2.8

Configure MQTT Broker

Create a user and ACL for the user

Docker image

docker build --pull --rm -f "dockerfile" -t trykle:latest "."
docker run -it --rm trykle:latest
#  docker run -it --privileged -v /dev:/dev --rm trykle:latest
#  docker run -it --privileged -v /dev/bus/usb:/dev/bus/usb --rm trykle:latest

docker run -it --privileged --device="class/DCDE6AF9-6610-4285-828F-CAAF78C424CC" --rm trykle:latest

Arduino CLI

arduino-cli core install esp8266:esp8266
arduino-cli core list
arduino-cli compile --fqbn arduino:esp8266:esp8266 MyFirstSketch

OpenSprinkler Analysis

Main loop code

• do_setup() Clear watchdog flag os.begin() os.optinos_setup() pd.init9) prograData init Real time clock sync Set last startup time Start network Sync ntp mqtt init reset all stations

• do_loop() check flow Check ethernet packets Check State (AP mode or not) if inital. Set ap mode. start_server_ap if connecting. start_server_client, or timeout if connected. wifi_server->handleClient() or reboot, or timeout ui_state_machine() os.mqtt.loop() Check rain delayed Check soil sensor Check program Switch status (Stop all, manual start) Check if need to run a program based on current time ensure station has non-zero time and is not disabled Enqueue a program if match Check time for any running programs to stop them os.apply_all_station_bits() Activate / deactivate valves Sync time check_network check_weather

Real Time Clock

The Real time clock runs on the I2C protocol

The device address is 0x68

There are 13 registers

• 00h
• ...
• 13h

Real Time Clock Ic^2 signal

• Power 3.3v
• GND
• SDA Data -> GPIO04 -> D2
• SCK Clock -> GPIO14 -> D5

To read, it looks like you have to write the device address and the regsiter address, then read

The data is coded in binary-coded decimal (BCD)

MCP23008-e/p PDIP/SOIC

• SCL/SCK Pin 1
• SDA/SI Pin 2
• A2/SO (Hardware address pin) Pin 3
• A1 (Hardware address pin) Pin 4
• A0 (Hardware address pin) Pin 5
• (-)Reset Pin 6 (Need to Keep high)
• VSS (Ground) Pin 9
• GP0 Pin 10
• GP1 Pin 11
• GP2 Pin 12
• GP3 Pin 13
• GP4 Pin 14
• GP5 Pin 15
• GP6 Pin 16
• GP7 Pin 17
• VDD (Power) Pin 18

Device Address Based on teh A0-1 pins

A0 | A1 | A2 | Decimal | Address

0 | 0 | 0 | 0 | 0x20 0 | 0 | 1 | 1 | 0x21 0 | 1 | 0 | 2 | 0x22 0 | 1 | 1 | 3 | 0x23 1 | 0 | 0 | 4 | 0x24 1 | 0 | 1 | 5 | 0x25 1 | 1 | 0 | 6 | 0x26 1 | 1 | 1 | 7 | 0x27

Register Address

Opensprinkler code:

References

• Example pubsub for mqtt on esp2688 https://github.com/knolleary/pubsubclient/blob/master/examples/mqtt_esp8266/mqtt_esp8266.ino
• Arduino CLI https://arduino.github.io/arduino-cli/latest/getting-started/
• OpenSprinkler repos https://github.com/OpenSprinkler
• PCF8523 Real Time Clock (RTC) Data Sheet https://www.nxp.com/docs/en/data-sheet/PCF8523.pdf
• Adafruit-PCF8523 RTC Breakout PCB Eagle https://github.com/adafruit/Adafruit-PCF8523-RTC-Breakout-PCB
• NTP background https://www.circuitbasics.com/using-an-arduino-ethernet-shield-for-timekeeping/
• Arduino Strings https://majenko.co.uk/blog/evils-arduino-strings
• Arduino Time library docs https://github.com/PaulStoffregen/Time
• C++ Style Guide https://google.github.io/styleguide/cppguide.html
• MCP23008-e/p https://4donline.ihs.com/images/VipMasterIC/IC/MCHP/MCHP-S-A0008004111/MCHP-S-A0008004111-1.pdf?hkey=52A5661711E402568146F3353EA87419
• MCP23008 video demo https://www.youtube.com/watch?v=Sos2ghv80wU
• Adafruit MCP230xx library https://github.com/adafruit/Adafruit-MCP23017-Arduino-Library