Sprinkler controller with countdown timer on display

ESPHome
1

I have been working on setting up a 8 zone sprinkler controller with an nextion display. Currently I have working touch buttons that change colour if a zone is running, you cannot run more than one zone at one time. Home-assistant can turn on/off each zone and the display reflects the running zone.

What I would like to have some sort of per predefined zone auto off with a countdown timer displayed. I am not sure if this is possible. Does anyone have any ideas?

Here is my current code for anyone interested:-

For each button on the nextion you need to have the below in either the ‘Touch Press Event’ or ‘Touch Release Event’ to pass back to esphome button press events
As detailed here https://github.com/esphome/issues/issues/83

if(bt0.val==1)
{
  printh 65 00 02 01 FF FF FF
}else
{
  printh 65 00 02 00 FF FF FF
}

esphome:
  name: sprinkler_controller
  platform: ESP8266
  board: d1_mini

wifi:
  ssid: "here"
  password: "that"
  manual_ip:
    # Set this to the IP of the ESP
    static_ip: 192.168.178.100
    # Set this to the IP address of the router. Often ends with .1
    gateway: 192.168.178.1
    # The subnet of the network. 255.255.255.0 works for most home networks.
    subnet: 255.255.255.0
    dns1: 192.168.178.2


# Enable logging
logger:

# Enable Home Assistant API
api:

ota:

web_server:
  port: 80

uart:
  rx_pin: D7
  tx_pin: D5
  baud_rate: 9600

time:
  - platform: sntp
    id: sntp_time
    timezone: Australia/Melbourne
    
display:
  - platform: nextion
    id: nextion_display
    update_interval: 10s
    lambda: |-
      char time[10];
      time_t currTime = id(sntp_time).now().timestamp;
      strftime(time, sizeof(time), "%I:%M %p", localtime(&currTime));
      it.set_component_text("time", time);
      
      

i2c:
  sda: 4
  scl: 5
  scan: False

pcf8574:
  - id: 'pcf8574_hub'
    address: 0x20
    pcf8575: False

binary_sensor:
  - platform: nextion
    page_id: 0
    component_id: 2
    nextion_id: nextion_display
    id: zone1_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone1_button
        then:
          - switch.turn_on: relay1
        else:
          - switch.turn_off: relay1  
  - platform: nextion
    page_id: 0
    component_id: 4
    nextion_id: nextion_display
    id: zone2_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone2_button
        then:
          - switch.turn_on: relay2
        else:
          - switch.turn_off: relay2 
  - platform: nextion
    page_id: 0
    component_id: 5
    nextion_id: nextion_display
    id: zone3_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone3_button
        then:
          - switch.turn_on: relay3
        else:
          - switch.turn_off: relay3 
  - platform: nextion
    page_id: 0
    component_id: 6
    nextion_id: nextion_display
    id: zone4_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone4_button
        then:
          - switch.turn_on: relay4
        else:
          - switch.turn_off: relay4  
  - platform: nextion
    page_id: 0
    component_id: 7
    nextion_id: nextion_display
    id: zone5_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone5_button
        then:
          - switch.turn_on: relay5
        else:
          - switch.turn_off: relay5  
  - platform: nextion
    page_id: 0
    component_id: 8
    nextion_id: nextion_display
    id: zone6_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone6_button
        then:
          - switch.turn_on: relay6
        else:
          - switch.turn_off: relay6  
  - platform: nextion
    page_id: 0
    component_id: 9
    nextion_id: nextion_display
    id: zone7_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone7_button
        then:
          - switch.turn_on: relay7
        else:
          - switch.turn_off: relay7  
  - platform: nextion
    page_id: 0
    component_id: 10
    nextion_id: nextion_display
    id: zone8_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone8_button
        then:
          - switch.turn_on: relay8
        else:
          - switch.turn_off: relay8  
          
switch:
  - platform: gpio
    name: "Zone 1"
    id: relay1
    restore_mode: ALWAYS_OFF
    interlock: [relay2 ,relay3, relay4, relay5, relay6, relay7, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 0
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(nextion_display).set_component_value("bt0", 1);
          - logger.log: "Send enable to touch button bt0"     
    on_turn_off:
          - lambda: |-
              id(nextion_display).set_component_value("bt0", 0);
          - logger.log: "Send disable to touch button bt0"
  - platform: gpio
    name: "Zone 2"
    id: relay2
    restore_mode: ALWAYS_OFF
    interlock: [relay1 ,relay3, relay4, relay5, relay6, relay7, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 1
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(nextion_display).set_component_value("bt1", 1);
          - logger.log: "Send enable to touch button bt1"     
    on_turn_off:
          - lambda: |-
              id(nextion_display).set_component_value("bt1", 0);
          - logger.log: "Send disable to touch button bt1"
  - platform: gpio
    name: "Zone 3"
    id: relay3
    restore_mode: ALWAYS_OFF
    interlock: [relay1 ,relay2, relay4, relay5, relay6, relay7, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 2
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(nextion_display).set_component_value("bt2", 1);
          - logger.log: "Send enable to touch button bt2"     
    on_turn_off:
          - lambda: |-
              id(nextion_display).set_component_value("bt2", 0);
          - logger.log: "Send disable to touch button bt2"
  - platform: gpio
    name: "Zone 4"
    id: relay4
    restore_mode: ALWAYS_OFF
    interlock: [relay1 ,relay2, relay3, relay5, relay6, relay7, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 3
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(nextion_display).set_component_value("bt3", 1);
          - logger.log: "Send enable to touch button bt3"     
    on_turn_off:
          - lambda: |-
              id(nextion_display).set_component_value("bt3", 0);
          - logger.log: "Send disable to touch button bt3"
  - platform: gpio
    name: "Zone 5"
    id: relay5
    restore_mode: ALWAYS_OFF
    interlock: [relay1 ,relay2, relay3, relay4, relay6, relay7, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 4
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(nextion_display).set_component_value("bt4", 1);
          - logger.log: "Send enable to touch button bt4"     
    on_turn_off:
          - lambda: |-
              id(nextion_display).set_component_value("bt4", 0);
          - logger.log: "Send disable to touch button bt4"
  - platform: gpio
    name: "Zone 6"
    id: relay6
    restore_mode: ALWAYS_OFF
    interlock: [relay1, relay2 ,relay3, relay4, relay5, relay7, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 5
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(nextion_display).set_component_value("bt5", 1);
          - logger.log: "Send enable to touch button bt5"     
    on_turn_off:
          - lambda: |-
              id(nextion_display).set_component_value("bt5", 0);
          - logger.log: "Send disable to touch button bt5"
  - platform: gpio
    name: "Zone 7"
    id: relay7
    restore_mode: ALWAYS_OFF
    interlock: [relay1, relay2 ,relay3, relay4, relay5, relay6, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 6
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(nextion_display).set_component_value("bt6", 1);
          - logger.log: "Send enable to touch button bt6"     
    on_turn_off:
          - lambda: |-
              id(nextion_display).set_component_value("bt6", 0);
          - logger.log: "Send disable to touch button bt6"
  - platform: gpio
    name: "Zone 8"
    id: relay8
    restore_mode: ALWAYS_OFF
    interlock: [relay1, relay2 ,relay3, relay4, relay5, relay6, relay7]
    pin:
      pcf8574: pcf8574_hub
      number: 7
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(nextion_display).set_component_value("bt7", 1);
          - logger.log: "Send enable to touch button bt7"     
    on_turn_off:
          - lambda: |-
              id(nextion_display).set_component_value("bt7", 0);
          - logger.log: "Send disable to touch button bt7"



sensor:
  - platform: wifi_signal
    name: sprinkler_controller_wifi
    update_interval: 60s
  - platform: uptime
    name: sprinkler_controller_uptime
    id: uptime_sensor
1 Like
2

I have worked it out if anyone is interested.

As per above. But will explain as best I can how its configured.

My display shows the current time and a timer counting up the current zone run time.

The maximum time a zone can run is hard coded currently to 15 minutes.

Each zone has a button that shows red when off and green when on.

Only one zone can run at a time. I have set that constraint due to limited power-supply size.

Below the current working code

esphome:
  name: sprinkler_controller
  platform: ESP8266
  board: d1_mini

wifi:
  ap:
    ssid: sprinker_controller
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  fast_connect: true
  manual_ip:
    # Set this to the IP of the ESP
    static_ip: 192.168.178.100
    # Set this to the IP address of the router. Often ends with .1
    gateway: 192.168.178.1
    # The subnet of the network. 255.255.255.0 works for most home networks.
    subnet: 255.255.255.0
    dns1: 192.168.178.1

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:

web_server:
  port: 80

uart:
  rx_pin: D7
  tx_pin: D5
  baud_rate: 9600

time:
  - platform: sntp
    id: sntp_time
    timezone: Australia/Melbourne

i2c:
  sda: 4
  scl: 5
  scan: False

pcf8574:
  - id: 'pcf8574_hub'
    address: 0x20
    pcf8575: False

globals:
   - id: zone_start_time
     type: int
     restore_value: no
     initial_value: '0'
   - id: zone_run_time
     type: int
     restore_value: no
     initial_value: '0'


     
interval:
  - interval: 1s
    then:
      - if:
          condition:
            lambda: |-
              return id(zone_start_time) != 0;
          then:
            - lambda: |- 
                id(zone_run_time) = id(sntp_time).now().timestamp - id(zone_start_time);
            - logger.log: 
                format: "Zone run time %.1d"
                args: [ 'id(zone_run_time)' ]
          else:
            - lambda: |-
                id(zone_run_time) = 0;
# Set maximum on time per zone, dont know how to do a global variable here
      - if:
          condition:
            for:
              time: 15min
              condition:
                switch.is_on: relay1
          then:
            - switch.turn_off: relay1
      - if:
          condition:
            for:
              time: 15min
              condition:
                switch.is_on: relay2
          then:
            - switch.turn_off: relay2
      - if:
          condition:
            for:
              time: 15min
              condition:
                switch.is_on: relay3
          then:
            - switch.turn_off: relay3
      - if:
          condition:
            for:
              time: 15min
              condition:
                switch.is_on: relay4
          then:
            - switch.turn_off: relay4
      - if:
          condition:
            for:
              time: 15min
              condition:
                switch.is_on: relay5
          then:
            - switch.turn_off: relay5
      - if:
          condition:
            for:
              time: 15min
              condition:
                switch.is_on: relay6
          then:
            - switch.turn_off: relay6
      - if:
          condition:
            for:
              time: 15min
              condition:
                switch.is_on: relay7
          then:
            - switch.turn_off: relay7
      - if:
          condition:
            for:
              time: 15min
              condition:
                switch.is_on: relay8
          then:
            - switch.turn_off: relay8

display:
  - platform: nextion
    id: nextion_display
    update_interval: 1s
    lambda: |-
      char ctime[10]; 
      char rtime[10];
      time_t currTime = id(sntp_time).now().timestamp;
      strftime(ctime, sizeof(ctime), "%I:%M %p", localtime(&currTime));
      time_t zone_time = id(zone_run_time);
      strftime(rtime, sizeof(rtime), "%M:%S", localtime(&zone_time));
      it.set_component_text("time", ctime);
      it.set_component_text("coutdown", rtime);
      
binary_sensor:
  - platform: nextion
    page_id: 0
    component_id: 2
    nextion_id: nextion_display
    id: zone1_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone1_button
        then:
          - switch.turn_on: relay1
        else:
          - switch.turn_off: relay1  
  - platform: nextion
    page_id: 0
    component_id: 4
    nextion_id: nextion_display
    id: zone2_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone2_button
        then:
          - switch.turn_on: relay2
        else:
          - switch.turn_off: relay2 
  - platform: nextion
    page_id: 0
    component_id: 5
    nextion_id: nextion_display
    id: zone3_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone3_button
        then:
          - switch.turn_on: relay3
        else:
          - switch.turn_off: relay3 
  - platform: nextion
    page_id: 0
    component_id: 6
    nextion_id: nextion_display
    id: zone4_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone4_button
        then:
          - switch.turn_on: relay4
        else:
          - switch.turn_off: relay4  
  - platform: nextion
    page_id: 0
    component_id: 7
    nextion_id: nextion_display
    id: zone5_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone5_button
        then:
          - switch.turn_on: relay5
        else:
          - switch.turn_off: relay5  
  - platform: nextion
    page_id: 0
    component_id: 8
    nextion_id: nextion_display
    id: zone6_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone6_button
        then:
          - switch.turn_on: relay6
        else:
          - switch.turn_off: relay6  
  - platform: nextion
    page_id: 0
    component_id: 9
    nextion_id: nextion_display
    id: zone7_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone7_button
        then:
          - switch.turn_on: relay7
        else:
          - switch.turn_off: relay7  
  - platform: nextion
    page_id: 0
    component_id: 10
    nextion_id: nextion_display
    id: zone8_button
    on_state:
      if:
        condition:
          - binary_sensor.is_on: zone8_button
        then:
          - switch.turn_on: relay8
        else:
          - switch.turn_off: relay8  
          
switch:
  - platform: gpio
    name: "Zone 1"
    id: relay1
    restore_mode: ALWAYS_OFF
    interlock: [relay2 ,relay3, relay4, relay5, relay6, relay7, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 0
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(zone_start_time) = id(sntp_time).now().timestamp;
              id(nextion_display).set_component_value("bt0", 1);
          - logger.log: "Send enable to touch button bt0"  
    on_turn_off:
          - lambda: |-
              id(zone_start_time) = 0;
              id(nextion_display).set_component_value("bt0", 0);
          - logger.log: "Send disable to touch button bt0"
  - platform: gpio
    name: "Zone 2"
    id: relay2
    restore_mode: ALWAYS_OFF
    interlock: [relay1 ,relay3, relay4, relay5, relay6, relay7, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 1
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(zone_start_time) = id(sntp_time).now().timestamp;
              id(nextion_display).set_component_value("bt1", 1);
          - logger.log: "Send enable to touch button bt1"     
    on_turn_off:
          - lambda: |-
              id(zone_start_time) = 0;
              id(nextion_display).set_component_value("bt1", 0);
          - logger.log: "Send disable to touch button bt1"
  - platform: gpio
    name: "Zone 3"
    id: relay3
    restore_mode: ALWAYS_OFF
    interlock: [relay1 ,relay2, relay4, relay5, relay6, relay7, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 2
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(zone_start_time) = id(sntp_time).now().timestamp;
              id(nextion_display).set_component_value("bt2", 1);
          - logger.log: "Send enable to touch button bt2"     
    on_turn_off:
          - lambda: |-
              id(zone_start_time) = 0;
              id(nextion_display).set_component_value("bt2", 0);
          - logger.log: "Send disable to touch button bt2"
  - platform: gpio
    name: "Zone 4"
    id: relay4
    restore_mode: ALWAYS_OFF
    interlock: [relay1 ,relay2, relay3, relay5, relay6, relay7, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 3
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(zone_start_time) = id(sntp_time).now().timestamp;
              id(nextion_display).set_component_value("bt3", 1);
          - logger.log: "Send enable to touch button bt3"     
    on_turn_off:
          - lambda: |-
              id(zone_start_time) = 0;
              id(nextion_display).set_component_value("bt3", 0);
          - logger.log: "Send disable to touch button bt3"
  - platform: gpio
    name: "Zone 5"
    id: relay5
    restore_mode: ALWAYS_OFF
    interlock: [relay1 ,relay2, relay3, relay4, relay6, relay7, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 4
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(zone_start_time) = id(sntp_time).now().timestamp;
              id(nextion_display).set_component_value("bt4", 1);
          - logger.log: "Send enable to touch button bt4"     
    on_turn_off:
          - lambda: |-
              id(zone_start_time) = 0;
              id(nextion_display).set_component_value("bt4", 0);
          - logger.log: "Send disable to touch button bt4"
  - platform: gpio
    name: "Zone 6"
    id: relay6
    restore_mode: ALWAYS_OFF
    interlock: [relay1, relay2 ,relay3, relay4, relay5, relay7, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 5
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(zone_start_time) = id(sntp_time).now().timestamp;
              id(nextion_display).set_component_value("bt5", 1);
          - logger.log: "Send enable to touch button bt5"     
    on_turn_off:
          - lambda: |-
              id(zone_start_time) = 0;
              id(nextion_display).set_component_value("bt5", 0);
          - logger.log: "Send disable to touch button bt5"
  - platform: gpio
    name: "Zone 7"
    id: relay7
    restore_mode: ALWAYS_OFF
    interlock: [relay1, relay2 ,relay3, relay4, relay5, relay6, relay8]
    pin:
      pcf8574: pcf8574_hub
      number: 6
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(zone_start_time) = id(sntp_time).now().timestamp;
              id(nextion_display).set_component_value("bt6", 1);
          - logger.log: "Send enable to touch button bt6"     
    on_turn_off:
          - lambda: |-
              id(nextion_display).set_component_value("bt6", 0);
          - logger.log: "Send disable to touch button bt6"
  - platform: gpio
    name: "Zone 8"
    id: relay8
    restore_mode: ALWAYS_OFF
    interlock: [relay1, relay2 ,relay3, relay4, relay5, relay6, relay7]
    pin:
      pcf8574: pcf8574_hub
      number: 7
      mode: OUTPUT
      inverted: True
    on_turn_on:
      then:
          - lambda: |-
              id(zone_start_time) = id(sntp_time).now().timestamp;
              id(nextion_display).set_component_value("bt7", 1);
          - logger.log: "Send enable to touch button bt7"     
    on_turn_off:
          - lambda: |-
              id(zone_start_time) = 0;
              id(nextion_display).set_component_value("bt7", 0);
          - logger.log: "Send disable to touch button bt7"



sensor:
  - platform: wifi_signal
    name: sprinkler_controller_wifi
    update_interval: 60s
  - platform: uptime
    name: sprinkler_controller_uptime
    id: uptime_sensor
10 Likes
3

wow this is amazing, exactly what ive started working on… you perhaps dont want to share your nextion project?.. for reference

4

Nowadays a sprinkler component for esphome exists:

The author (@kbx81) of that component even has a very nice ClimateSprinklerController in his github:

image

2 Likes